Resource · Water metering

Choosing a water meter

Choose a compatible water meter. Check the sizing, output and requirements, then compare models and prepare your order.

Latest meter verification: 3 September 2026. Sources accompany the specifications.

Start here

Choose what you need

Start with the reading you need, then check the meter and register together.

What you need from the meter
You need	Read	Confirm before ordering
Consumption	A running total	Register units and pulse weight
Flow rate	An instantaneous reading	4-20 mA output and configured span
Both	Total and rate	Both outputs, or an encoder through a Signalizer

Measurements and ordering mistakes

Total consumption and flow rate are different measurements

A totalizer counts volume that has already gone past: cubic metres since the meter was installed, the same running number your utility bills from. A rate signal reports how fast water is moving right now, in litres per minute or m³/h, and it keeps no memory of what came before. A meter can report one, the other or both, and which you get depends on the register and the output you order rather than on how the meter measures.

Why a factory wants both

Consumption is what pays for the project: overnight baseline, weekend flow through an empty building, litres per unit produced, the line on the bill. Rate is what you watch while somebody turns a valve, and it is the number that shows a pump running dry or a line letting go. On a water main our default is a pulse output for consumption and a 4-20 mA loop for rate wherever the meter offers one, both landing on the same centralized dashboard.

Five ways to buy the wrong meter

Ordering mistakes and how to avoid them
Check	Why it matters
Sized to the pipe instead of the flow	A 2" service line does not mean a 2" meter. Neptune's 2" T-10 holds ±1.5% from 2.5 to 160 USGPM, so a building drawing 15 to 20 USGPM sits inside the accurate range rather than below it. What oversizing really costs you is the low end: the same sheet puts 95% accuracy at 1 USGPM, so an overnight trickle or a slow leak under that never registers, and the meter runs far under the 80 USGPM of continuous duty a 2" is sized for. Size the meter to the minimum, typical and maximum flow, and let the pipe be its own calculation. Neptune T-10 (1-1/2" and 2") product sheet · AWWA M-22 flows, via Denver Water
The wrong output signal	The measuring element and the output are separate purchases. A Neptune or Badger meter body ships with a mechanical odometer and no wired signal at all, and the encoder register is a line item somebody has to remember to add. Confirm the output on the purchase order, not on the morning of the install. Neptune T-10 product sheet
The wrong units	Most North American registers ship reading US gallons or cubic feet, because the big manufacturers build primarily for the US market and nothing in Canadian law forces a metric register. Canadian utilities bill in cubic metres. Ask for the register unit in writing and check it against the faceplate when the meter lands. Measurement Canada, water meter consultation
Resolution too coarse to see anything	Display resolution and pulse weight are two different settings. A register can read to three decimals and still be programmed to close its contact once per 100 US gallons, which turns an overnight leak into a flat line. Pick the pulse weight for the leak you want to catch, then confirm what the register is actually set to at commissioning. Sensus OMNI+ register datasheet
An encoder with nowhere to plug in	Neptune's R900i puts the encoder and the radio on one board inside one sealed housing, so there is no three-wire pigtail to tap. ScadaMetrics says it outright: the Signalizer is not compatible with the R900i versions of these registers. A standalone R900 wired to a separate register is fine, because those three wires are still exposed. Neptune E-CODER)R900i FAQ · Signalizer Neptune datasheet

Our picks

Our picks and their limits

Check the size, signal and operating limits before specifying a model.

Our picks, their limits and Canadian buying routes
Model	Measurement limits	Connection and installation	Buying and evidence
NeptuneMACH 10	Type and sizes Ultrasonic, inline; 5/8", 3/4", 1", 1-1/2", 2" Temperature and potable rating 0.5 to 50 °C; NSF 61, AWWA C715 Lowest stated flow 5/8: 0.02 m³/h; 3/4: 0.02 m³/h; 1: 0.09 m³/h; 1-1/2: 0.8 USGPM; 2: 1.5 USGPM Flow range ratio not stated Watch out: Battery life varies by size; the 20-year figure covers 5/8 to 1 inch.	Quantify reads consumption: encoder through a Signalizer; rate: 4-20 mA Installation cut into the line, horizontal or vertical, straight run 0 D upstream, 0 D downstream Power 3.6 V lithium battery, potted and non-replaceable Register units USgal, IGal, ft³, m³ Battery life 20 years expected at 5/8 to 1 inch; not stated at 1-1/2 to 2 inches	Price band and Canadian route $$; neptune-canada, evan-supply, Wolseley Waterworks (Wolseley Canada Inc.) Verified 3 September 2026
Why we specify it The full evidence
NeptuneMACH 10 C&I	Type and sizes Ultrasonic, inline; 3", 4", 6", 8", 10", 12" Temperature and potable rating -10 to 65 °C; NSF 61, AWWA C715 Lowest stated flow 3: 0.75 USGPM; 4: 1.5 USGPM; 6: 2 USGPM; 8: 6 USGPM; 10: 10 USGPM; 12: 12 USGPM Flow range ratio not stated Watch out: Battery life is 10 years on this size range.	Quantify reads consumption: encoder through a Signalizer; rate: 4-20 mA Installation cut into the line, horizontal or vertical, straight run 0 D upstream, 0 D downstream Power Sealed lithium battery Register units USgal, ft³, m³ Battery life 10 years expected at 3 to 12 inches	Price band and Canadian route $$$; neptune-canada, evan-supply, Wolseley Waterworks (Wolseley Canada Inc.) Verified 3 September 2026
Why we specify it The full evidence
KeyenceFD-Q series	Type and sizes Ultrasonic, clamp-on; 1/4 (8A), 3/8 (10A), 1/2 (15A), 3/4 (20A), 1 (25A), 1 1/4 (32A), 1 1/2 (40A), 2 (50A) Temperature and potable rating 0 to 85 °C; not stated Lowest stated flow not stated Flow range ratio not stated Watch out: For trending, with sizes only up to 2 inches; larger mains need another model.	Quantify reads consumption: pulse; rate: 4-20 mA Pulse weight not stated Installation clamps on, no cut Power 20-30 VDC, Class 2/LPS; 100-130 mA excluding load Register units L Battery life not stated	Price band and Canadian route $$$; keyence-canada-direct Verified 3 September 2026
Why we specify it The full evidence
DAEAS250U	Type and sizes Single jet; 1" Temperature and potable rating up to 40 °C; no NSF 61 Lowest stated flow 1: 0.75 USGPM Flow range ratio not stated Watch out: This model is not NSF 61 certified.	Quantify reads consumption: pulse; rate: no route Pulse weight 10 gal/pulse (1in) Installation cut into the line Power No supply for the base meter; passive dry-contact pulse Register units USgal Battery life not stated	Price band and Canadian route $; Amazon.ca Verified 3 September 2026
Why we specify it The full evidence
GF Signet2536 Rotor-X	Type and sizes Paddlewheel, insertion; 1/2-36 (PP/PVDF); 1/2-4 (PVC body) Temperature and potable rating -18 to 85 °C; NSF 61 Lowest stated flow not stated Flow range ratio 66:1 Watch out: Its output is fixed open-collector frequency; it is not switch-selectable.	Quantify reads consumption: no route; rate: derived from pulses Pulse weight not stated Installation cut into the line Power 5-24 VDC from the host transmitter; less than 20 mA Register units not stated Battery life not stated	Price band and Canadian route $$; Canadian distributor not stated Verified 3 September 2026
Why we specify it The full evidence
GF Signet2537	Type and sizes Paddlewheel, insertion; 1/2-8" Temperature and potable rating -18 to 85 °C; NSF 61 Lowest stated flow not stated Flow range ratio not stated Watch out: Output families are fixed by order code; confirm the output before ordering.	Quantify reads consumption: pulse; rate: 4-20 mA Pulse weight not stated Installation cut into the line Power Depends on the ordered output; voltages in the evidence below Register units not stated Battery life not stated	Price band and Canadian route $$; Canadian distributor not stated Verified 3 September 2026
Why we specify it The full evidence
ScadaMetricsSignalizer Model EMP	Type and sizes Other; not stated Temperature and potable rating -40 to 85 °C; not stated Lowest stated flow not stated Flow range ratio not stated Watch out: It does not work on integrated R900i registers.	Quantify reads consumption: pulse; rate: 4-20 mA Pulse weight configurable via DIP switches: gallon, cubic foot, or cubic metre, scaled x1/x10/x100/x1000/x0.1/x0.01/x0.001/x0.0001/x0.00001 Installation clamps on, no cut Power 9-36 VDC; 1.25 W typical Register units not stated Battery life not stated	Price band and Canadian route $$; Canadian distributor not stated Verified 3 September 2026
Why we specify it The full evidence

Model-specific ordering notes

The MACH 10's 20-year battery is a residential figure. Neptune's own C&I product sheet states 10 years for the 3" to 12" sizes, which are the ones that go on a water main, so do not carry the 20-year number across the line. Keyence's FD-Q does not measure temperature, whatever the family brochure suggests; that belongs to the FD-R and FD-H, and the FD-Q stops at 2", so FD-R is the Keyence answer for anything larger.

The GF Signet 2536 has exactly one output, an open-collector frequency signal at 49 Hz per m/s, and it is not switch-selectable; it needs a 9900, 9950 or 8150 transmitter, or a frequency-counting PLC input, before it produces either a totalized pulse or a 4-20 mA rate. The reed-versus-solid-state choice people remember lives on the 2537, where GF calls the mechanical option a Dry Contact Relay, and one unit ships with only one of the four output families, fixed by order code. The DAE AS250U is the budget pick and it is not NSF 61 certified, so keep it off potable service where a by-law asks for NSF 61 and use DAE's MJ-series instead.

Sizing

Check the operating range

Use the expected flow range. Pipe size alone cannot establish meter accuracy.

Measurements to bring to the size check
Reading	Use it to check
Minimum flow	Low-flow and leak visibility
Typical flow	Normal operating range
Maximum flow	Peak capacity

Check a size against the standards

This tool needs JavaScript. The full flow tables are printed below it, so you can do the same check by hand.

Flow bands by size and standard

AWWA C700 · Positive displacement 5 sizes

Nominal	Low (Q1)	Normal (Q3)	Max (Q4)	Unit	Source
5/8"	not stated	10	20	USGPM	Source
3/4"	not stated	15	30	USGPM	Source
1"	not stated	25	50	USGPM	Source
1-1/2"	not stated	50	100	USGPM	Source
2"	not stated	80	160	USGPM	Source

AWWA C700 (manufacturer-stated normal operating range, Sensus SR II) · Positive displacement 3 sizes

Nominal	Low (Q1)	Normal (Q3)	Max (Q4)	Unit	Source
5/8"	1	not stated	20	USGPM	Source
3/4"	2	not stated	30	USGPM	Source
1"	3	not stated	50	USGPM	Source

AWWA M-22 (High Normal Meter Flow, via Denver Water) · Positive displacement 4 sizes

Nominal	Low (Q1)	Normal (Q3)	Max (Q4)	Unit	Source
3/4"	not stated	15	not stated	USGPM	Source
1"	not stated	25	not stated	USGPM	Source
1-1/2"	not stated	50	not stated	USGPM	Source
2"	not stated	80	not stated	USGPM	Source

AWWA C708 · Multi jet 1 size

Nominal	Low (Q1)	Normal (Q3)	Max (Q4)	Unit	Source
1"	3	not stated	50	USGPM	Source

AWWA C712 (manufacturer claim, DAE) · Single jet 1 size

Nominal	Low (Q1)	Normal (Q3)	Max (Q4)	Unit	Source
1/2"	0.25	7.5	15	USGPM	Source

AWWA C702 · Compound 4 sizes

Nominal	Low (Q1)	Normal (Q3)	Max (Q4)	Unit	Source
3"	not stated	not stated	320	USGPM	Source
4"	not stated	not stated	500	USGPM	Source
6"	not stated	not stated	1000	USGPM	Source
8"	not stated	not stated	1600	USGPM	Source

AWWA M-22 (High Normal Meter Flow, via Denver Water) · Compound 5 sizes

Nominal	Low (Q1)	Normal (Q3)	Max (Q4)	Unit	Source
2"	not stated	80	not stated	USGPM	Source
3"	not stated	160	not stated	USGPM	Source
4"	not stated	250	not stated	USGPM	Source
6"	not stated	500	not stated	USGPM	Source
8"	not stated	800	not stated	USGPM	Source

AWWA C701 (Class II, via AWWA M22-04 Table 6-1) · Turbine 2 sizes

Nominal	Low (Q1)	Normal (Q3)	Max (Q4)	Unit	Source
10"	not stated	not stated	3800	USGPM	Source
12"	not stated	not stated	5000	USGPM	Source

AWWA M-22 (High Normal Meter Flow, Turbine Class II, via Denver Water) · Turbine 7 sizes

Nominal	Low (Q1)	Normal (Q3)	Max (Q4)	Unit	Source
1-1/2"	not stated	80	not stated	USGPM	Source
2"	not stated	100	not stated	USGPM	Source
3"	not stated	240	not stated	USGPM	Source
4"	not stated	420	not stated	USGPM	Source
6"	not stated	920	not stated	USGPM	Source
8"	not stated	1600	not stated	USGPM	Source
10"	not stated	2500	not stated	USGPM	Source

Manufacturer rating (DAE WP-250N, non-AWWA) · Woltmann 1 size

Nominal	Low (Q1)	Normal (Q3)	Max (Q4)	Unit	Source
2-1/2"	not stated	not stated	300	USGPM	Source

AWWA C715 Standard Type 1 (Neptune MACH 10, normal operating range @ ±1.5%) · Ultrasonic, inline 5 sizes

Nominal	Low (Q1)	Normal (Q3)	Max (Q4)	Unit	Source
5/8"	0.1	not stated	25	USGPM	Source
3/4"	0.1	not stated	35	USGPM	Source
1"	0.4	not stated	55	USGPM	Source
1-1/2"	0.8	not stated	125	USGPM	Source
2"	1.5	not stated	160	USGPM	Source

ISO 4064 / OIML R49 (illustrative Q1-Q4 worked example from the Australian NMI R49 market, not a Canadian benchmark) · Other 1 size

Nominal	Low (Q1)	Normal (Q3)	Max (Q4)	Unit	Source
DN20	0.02	4	5	m³/h	Source

Flow definitions, accuracy and sizing notes

Sizing definitions and their limits
Check	Definition and limits
Q1 to Q4, and the R ratio	OIML R49, which is word for word the same text as ISO 4064, describes every meter with four flow points. Q1 is the lowest flow it still measures inside its permitted error, Q2 is the transitional point at 1.6 times Q1 that splits the range into a loose zone and a tight one, Q3 is the highest flow it can run at continuously, and Q4 is a short-duration overload fixed at 1.25 times Q3. A meter is designated by its Q3 and by R, the ratio Q3 divided by Q1, and the higher R is the further down into a trickle the meter keeps reading. One utility study found an R800 meter registered 8% more water than the R200 meter it replaced on the same service, which is 8% of that customer's consumption happening below what the old meter could see.
What the accuracy classes permit	Class 1 allows ±1% in the upper zone for water between 0.1 °C and 30 °C, widening to ±2% above 30 °C, and ±3% in the lower zone at any temperature. Class 2 allows ±2% in the upper zone, ±3% above 30 °C, and ±5% in the lower zone. Below Q1 there is no accuracy guarantee at all, which is the number that matters when you are sizing for leak detection.
The AWWA way of saying the same thing	AWWA organizes cold-water meters by technology rather than by one universal Q number, and utilities work from a stated safe maximum operating capacity per nominal size with continuous duty recommended at roughly half of it. A 5/8" displacement meter is rated 20 USGPM safe maximum and about 10 USGPM continuous, and a 2" is 160 and about 80. Different engineering guidelines apply different margins to the same underlying AWWA M-22 data, which is why the table below carries the same size twice under two standards with two different numbers; both are shown rather than averaged.
Velocity and pressure loss	The Uniform Plumbing Code and AWWA Manual M-22 both cap service velocity at 10 ft/s, while the International Plumbing Code treats anything past 5 to 8 ft/s as not usually recommended. Velocity above a meter's rated range wears moving elements faster and drives pressure loss up with roughly the square of velocity. AWWA publishes a maximum allowable head-loss curve that manufacturers plot their own meters against, and real figures sit in the range of 7.0 psi at 20 USGPM for a 5/8" displacement meter up to 14.0 psi at 30 USGPM for a 3/4" multi-jet, against effectively nothing for a mag or an ultrasonic meter.
Both mistakes are real, in opposite directions	Oversize the meter and typical flows fall under Q1, so ordinary draws and slow leaks go unmeasured, and even the flows that do register sit in the loose accuracy zone rather than the tight one. Undersize it and flows sit near or past the safe maximum, which the standards only permit for short bursts, so pressure loss climbs, the measuring element wears faster and accuracy drifts out of tolerance early. The failure that costs more is usually oversizing, because it is silent.
Getting the flow numbers honestly	Metered history beats every estimate: twelve months of utility bills, or a logged minimum, typical and maximum off an existing submeter, needs no citation beyond the client's own data. Where there is no history, a fixture-unit count or a mechanical engineer's hydraulic calculation is the right input, and it is worth paying for. Once you have the three numbers, check that the minimum clears the candidate meter's Q1, the typical sits comfortably inside the normal range rather than at its ceiling, and the peak stays under Q4.

Output signals

Connect the output to Quantify

Order the output with the meter. LoRaWAN is one of the 900 MHz protocols we install; Digi XBee and similar radios reach the same gateway. For a clamp-on process line, check the model’s stated accuracy and temperature limit in Technologies and Catalogue.

Meter signal, the Quantify device that reads it, what it gives you, and our preference
Meter signal	Our device	What you get	Preference
Pulse, reed or solid state, from the meter's own register, a Signalizer, a Badger HR-LCD Pulse or a Sensus OMNI+	LoRaWAN pulse counter	Running total, counted pulses times the pulse weight	Preferred for consumption
4-20 mA, from a process meter's own transmitter or from a Signalizer reading an encoder	Analog LoRaWAN or read-only Modbus node on the loop	Instantaneous flow rate	Preferred for rate
Encoder register: Neptune ARB and E-CODER, Sensus UI-1203, Badger ADE and HR-E	Signalizer EMP into a pulse counter, with an analog node off the same box for rate	Total, and rate from the same box	Preferred for encoder-only meters
Read-only Modbus RTU or TCP, on process instruments	Read-only Modbus gateway	Whatever the register map exposes, usually total and rate, sometimes temperature and alarms	Used where offered

Signal wiring, encoders and compatibility

Pulse

A pulse output is a contact that closes once per fixed volume: one tick, one unit, for the life of the meter. A reed switch is a magnet-actuated dry contact, needs no power at the meter, and is rated well past a hundred million cycles for metering duty. Because a magnet closes it, a magnet held against the meter can also spoof it, which is why AMI-grade registers add their own tamper, leak and reverse-flow flags instead of trusting the raw pulse train. A solid-state output, meaning an open collector or a Hall sensor, needs a small supply but takes far higher rates and does not bounce.

Pulse weight and dividers

Pulse weight is the volume one closure represents, and it is set at the register rather than built into the meter body. On a Sensus OMNI+ register you choose which digit of the nine-digit totalizer drives the output, which steps the weight through 1, 10, 100 and on up to 100,000 US gallons, with parallel tables for cubic feet and cubic metres. The Signalizer exposes the same idea as DIP-switch scalars from x0.00001 through x1,000. That digit choice is all anybody means by a pulse divider.

The rate ceiling almost never binds

A representative industrial LoRaWAN pulse counter accepts up to 2000 Hz with a 250 µs minimum pulse width. Run that against real flow bands and the worst case in the whole size run, an 8" meter at 4000 USGPM, would need a 0.126 L pulse weight before it reached the ceiling, which is far finer than any register offers. So choose the weight for how quickly you want to see a leak and for what the register can actually be set to, not to protect the counter. Where the ceiling does start to matter is a raw frequency sensor: a GF Signet 2536 puts out 49 Hz per m/s, so about 294 Hz at the top of its range.

Debounce and wiring

Mechanical contacts bounce for a moment after they close, and the counting device suppresses the extra counts with a debounce window; the counter above states a 250 µs minimum pulse width and digital filtering for exactly that. Everything in this section is a dry contact or an open-collector sink, so the receiving device supplies its own pull-up. The Signalizer takes 12 to 26 AWG on screw terminals, a GF Signet 2536 ships with 7.6 m of shielded twisted pair and runs to 305 m through a junction box, and the pulse counter arrives with a 1 m tail. No manufacturer publishes a blanket maximum cable length, so treat each device's own figure as the limit.

4-20 mA

A current loop reports instantaneous flow rate: 4 mA is zero and 20 mA is whatever full-scale flow the transmitter is configured for. There is no accumulator on the wire, so a running total has to be integrated downstream, and the error in that total comes from how often you sample against how fast the flow really changes. Resolution belongs to the receiving device rather than the loop; the Signalizer generates its output through a 16-bit converter and offers fixed full-scale spans up to 18,000 USGPM. If the transmitter is loop-powered it draws its supply from the same pair, and adding a second loop supply on top of it causes damage, which the Signalizer's own quick-start guide states in as many words.

Read-only Modbus, HART, BACnet and M-Bus

These live on process instruments rather than on AWWA utility meters. Neptune, Sensus and Badger utility registers speak their own encoder protocols, while a GF Signet 9900 transmitter takes a plug-in read-only Modbus RS-485 module or a HART module as ordering options. HART is a digital signal riding on top of the 4-20 mA loop, carrying diagnostics without disturbing the analog value. BACnet is a building-automation standard that a meter reaches through a gateway rather than a native output, and M-Bus is the European two-wire remote-reading bus you meet on Kamstrup-class meters. When a meter does speak read-only Modbus it usually exposes a totalizer, a rate register and sometimes temperature and alarm bits, but the register map varies by instrument, so ask for it before you promise anything.

Encoder registers, and the encoded trap

An encoder register reports an absolute reading over a synchronous three-wire interface: power and clock on one wire, data on the second, common on the third. That is the real difference from a pulse. A pulse says one more unit happened and can never recover a missed count, while an encoder says the total is now this number, so a reader that lost power simply asks again. Neptune's ARB and E-CODER, Sensus UI-1203 and Badger's ADE and HR-E all work this way, and none of them does anything useful wired into a generic pulse counter.

The ScadaMetrics Signalizer is the box that bridges it, and there is exactly one model, the EMP. The separate PDFs on ScadaMetrics' site are per-brand DIP-switch tables for the same physical unit. It decodes Neptune MACH 10, ProCoder and E-CODER, Sensus fixed and variable-digit registers and Elster or AMCO K-frame registers, and it produces a 4-20 mA rate signal, a dry-contact volume pulse and a fault contact, while passing the encoder straight through to a utility AMI endpoint. On the older Neptune ProRead it gives pulse only, because six digits are too coarse to hold a stable analog output.

Then there is the R900i. Neptune builds the R900 radio onto the same board as the encoder inside one sealed housing, on purpose, to cut installation cost and tamper points, and the product sheet lists no external wires as a feature. ScadaMetrics' footnote is blunt: the Signalizer is not compatible with the R900i versions of these registers. A standalone R900 is a different animal, wired to the register by three exposed terminals, so a Signalizer can sit in parallel with it and both keep working.

If a site is already full of R900i registers, check the part number first, because only the fused R900i units are affected. Neptune's registers are bayonet-mounted and field-swappable by design, so swapping the register for a standalone E-CODER or ProCoder is an option to confirm with a Neptune distributor. No Neptune procedure or compatibility table for that specific swap turned up in this research, so treat it as a question for the distributor rather than a settled fix.

Two ways in, one way out. The encoder path in cyan is the one most utility meters need.

Pulse weight and leak visibility

Recommended pulse weight by meter size

Quantify guidance, not a standard. Flow figures are Neptune's published maximums for each size; the arithmetic and the recommendation are ours.

Recommended pulse weight by meter size, with pulse rate at maximum flow and time to one pulse at a small overnight leak
Size	Max flow	Max flow, L/s	Pulse weight we ask for	Pulses per second at max flow	Share of a 2000 Hz ceiling	Time to one pulse at a 2 L/min leak
5/8"	25 USGPM	1.58	1 L	1.58	0.08%	30 s
3/4"	35 USGPM	2.21	1 L	2.21	0.11%	30 s
1"	55 USGPM	3.47	1 L	3.47	0.17%	30 s
1-1/2"	100 USGPM	6.31	10 L	0.63	0.03%	5 min
2"	160 USGPM	10.09	10 L	1.01	0.05%	5 min
3"	500 USGPM	31.55	10 L	3.16	0.16%	5 min
4"	1250 USGPM	78.86	10 L	7.89	0.39%	5 min
6"	2000 USGPM	126.2	10 L	12.62	0.63%	5 min
8"	4000 USGPM	252.4	10 L	25.2	1.26%	5 min

Small sizes measure down to a fraction of a USGPM already, so a 1 L pulse keeps leak visibility in proportion to what the meter itself can resolve. From 1-1/2" up, a 2 L/min leak is close to or below the meter's own extended low-flow floor, so a finer weight buys little and costs radio airtime and battery. Flow figures from Neptune's MACH 10 residential, T-10 intermediate and MACH 10 C&I product sheets.

Units, registers and power

Specify units and power

Ask for the register unit and pulse weight in writing.

Register choices
Register	Reading	Check
Mechanical	Odometer and sweep hand	Unit and multiplier
Electronic LCD	Total, often rate	Display and pulse resolution
Absolute encoder	Stored total	Protocol and compatible reader

Conversions, registers and power options

Exact conversions between the five units found on water meter registers
Unit	Exactly equals	Source
1 US gallon	3.785411784 L	NIST SP 811
1 Canadian (Imperial) gallon	4.54609 L	Weights and Measures Act, Schedule II
1 cubic foot	28.316846592 L, or 0.028316846592 m³	NIST SP 811
1 cubic metre	1000 L	Weights and Measures Act, Schedule I

A US gallon and a Canadian gallon are not the same unit; the American one is about 20% smaller. A spec sheet that only says "gallons" is ambiguous until somebody confirms which.

Why a Canadian meter reads in US gallons

Nothing in Canadian law forces a metric register, because water meters sit outside Measurement Canada's approval regime, so there is no rule to comply with. The large utility-meter manufacturers build primarily for the US market, so the stock configuration reads US gallons or cubic feet while Canadian municipalities bill in cubic metres. Specify the register unit on the purchase order, check it against the faceplate at commissioning, and write down the conversion factor you used so the next person does not have to work it out.

Three kinds of register

A mechanical odometer with a sweep hand gives the whole-unit total on numbered wheels and sub-unit resolution on the rotating pointer, and the reading convention is to take the lower number when the hand sits between two. An electronic LCD register is a digital totalizer that usually offers a choice of unit and often shows instantaneous rate alongside the total. An absolute encoder stores the reading electronically and non-volatilely, which is what lets an AMI endpoint or a Signalizer ask for it repeatedly without ever losing count.

Multipliers and rollover

Some registers print one or more fixed trailing zeros, or colour a digit differently, to signal a multiplier so the printed number is in tens or hundreds of units. Where the manufacturer's own manual does not confirm the multiplier for that exact model, treat it as not stated instead of guessing from a generic reading guide. Every totalizer also rolls over at its digit limit, and there is no universal rollover value across manufacturers, so pull it from the model's own datasheet.

Display resolution is not pulse resolution

The smallest increment the register displays and the volume one pulse represents are two separate numbers, set independently. A register at maximum resolution paired with a Signalizer can produce one pulse per litre, and the same Signalizer has a slower mode producing one pulse per ten litres; that is an installer setting, not a property of the meter. Before wiring anything into a counter, confirm the pulse weight the register is currently programmed to, and confirm it again at commissioning rather than trusting a datasheet default.

Power

Power options across the catalogue
Option	What it means	Where you meet it
None	A fully mechanical register accumulates and displays with no power at all. Anything bolted on afterwards, such as an encoder driver, a Signalizer or an AMI radio, needs its own supply.	Neptune T-10, Badger Recordall, most displacement and turbine bodies
Battery	A sealed lithium cell, usually potted and not user-replaceable, rated for a multi-year design life. Read the figure per size rather than per family.	MACH 10 at 20 years on 5/8" to 1" and 10 years on 3" to 12"; Siemens MAG 8000 up to 15 years on a four D-cell pack
Loop-powered	A 4-20 mA device draws its operating power from the same pair that carries the signal, so no separate power run is needed. Never add a second loop supply on top of one.	Signalizer 4-20 mA output, most two-wire process transmitters
Externally powered	24 VDC or 120 VAC at the meter. Standard on process instruments, and the reason a mag meter in a remote pit is usually the battery version instead.	Siemens MAG 5100 W, GF Signet transmitters, most clamp-on ultrasonic units

What a display can and cannot do

Rate as well as total, a choice of unit, and a programmable pulse divider are register features rather than meter features, so they are ordered with the register. A meter body and its register are usually separate part numbers, and on Neptune's line the register is bayonet-mounted and swappable in the field. That is good news when a site needs a different signal later, and it is the reason an R900i, where the register and radio are one sealed unit, closes the door.

Certifications and rules

Check the required approvals

Match the requirements to the service and installation.

Certification scope and ordering checks
Check	What it covers	Ordering action
NSF 61 / 372	Leaching and lead content	Read both listings
AWWA	Technology-specific standards	Confirm the cited standard
Measurement Canada	Water meters exempt from approval	Check local billing requirements
Hot water and wet locations	Temperature class and enclosure	Confirm the model’s temperature and immersion limits
Process and electrical requirements	Sanitary, powered and pressure applications	Read the application-specific rules below

Standards, approvals and local requirements

NSF 61 and NSF 372 do different jobs

NSF/ANSI/CAN 61 says a wetted component does not leach contaminants into drinking water above the allowable thresholds. NSF/ANSI/CAN 372 is the separate check on lead, against a weighted average of 0.25% across the wetted surfaces. A meter can be listed to 61 and carry no 372 claim, which is exactly what several Neptune and Sensus datasheets do, so read both lines. Only a product bearing the mark is certified, so search the NSF listing rather than trusting a datasheet claim.

There is an AWWA standard per technology, not one stamp

Nothing is simply "AWWA approved". Each meter type has its own standard, and the one a datasheet cites tells you what family the meter belongs to.

AWWA standards by scope
Standard	Scope
C700	displacement type, metal alloy main case, 1/2" to 2".
C710	displacement type, plastic main case, 1/2" to 1".
C701	turbine type for customer service, 3/4" to 20", split into vertical-shaft Class I and horizontal high-velocity Class II.
C702	compound type, 2" to 8", a turbine mainline element plus a displacement bypass.
C703	fire-service type, 3" to 10".
C704	propeller type for waterworks, 2" to 72".
C707	encoder-type remote-registration systems, which is the standard behind E-CODER, UI-1203 and ADE class registers.
C708	multi-jet type, 5/8" to 2".
C712	single-jet type, 5/8" to 6".
C713	fluidic-oscillator type, 1/2" to 2".
C714	meters for residential fire-sprinkler systems, 3/4" to 2".
C715	electromagnetic and ultrasonic type for revenue applications, 1/2" to 20". This is the one a MACH 10 or a flowIQ cites.
C750	transit-time flowmeters in full closed conduits, a process standard rather than a revenue one.
C751	magnetic inductive flowmeters, likewise process rather than revenue.

Titles and scopes from the AWWA standards list.

Measurement Canada does not approve water meters

This is the correction worth making out loud, because it comes up on nearly every project. Measurement Canada's own consultation page states that water meters are exempt from requiring approval and initial inspection before they are used to determine a customer's water consumption, unlike scales and gas pumps. Its role is verifying that trade devices measure accurately, while provincial and municipal authorities set billing practice and rates. You do not need a Measurement Canada approval to bill a tenant for water, which is genuinely different from gas, electricity and thermal energy.

Measurement Canada, water meter consultation

Ontario sub-metering rules are about electricity

Section 57(c.1) of the Ontario Energy Board Act makes unlicensed unit sub-metering an offence, and the OEB's Unit Sub-Metering Code sets installation, testing, reading and billing rules for licensees. The OEB's own scope statement limits all of that to electricity and says plainly that it does not regulate billing for natural gas or water. For a commercial or industrial water sub-meter the controlling documents are the municipal water by-law and the lease, which is a much shorter path than electricity sub-metering. A residential rental building is a different question, because the Residential Tenancies Act constrains suite-level billing, and that one is worth a lawyer rather than a meter catalogue.

OEB unit sub-metering

Two Ontario examples

Guelph's sub-meter rebate requires sub-meters to meet or exceed AWWA and NSF/ANSI 61 standards, and its water by-law makes protecting the meter from freezing the property owner's job, including maintaining heat to it. Hamilton runs a formal submeter application through Meter Operations, sizes meters to AWWA M22, tests accuracy to AWWA standards, and bills the owner for the test and the replacement when a meter reads more than 2% out. Neither by-law mentions Measurement Canada anywhere.

Guelph sub-meter rebate · Guelph water by-law · Hamilton water works by-law manual

Hot water needs a different meter

Standard cold-water meters are built for roughly 30 °C to 50 °C. ISO 4064 and OIML R49 mark the range as a temperature class: T30 and T50 are cold, T70 and T90 are hot, and T130 and above are district heating. B Meters' GSD8-RFM shows the split cleanly, sold as a 0 °C to 50 °C cold version and a 30 °C to 90 °C hot version of the same multi-jet body. Seals, lubricants and register plastics are what fail first when a cold meter is run hot, so read the stated class instead of inferring it from the body material.

B Meters GSD8-RFM datasheet

IP67 and IP68 are not interchangeable

IP67 covers brief immersion to about a metre. IP68 covers continuous or deeper submersion, to a depth and duration the manufacturer states rather than a fixed number in the standard. A register or transmitter in a below-grade pit where water stands needs IP68, and IP67 is for positions that get weather but not standing water. There is no equivalent freeze-rating scheme, so treat freeze tolerance as the manufacturer's stated minimum operating temperature and read the local by-law on whose job it is to protect the meter.

Powered meters carry electrical marks too

NSF 61 and AWWA say nothing about electrical safety. On any powered meter look separately for a CSA or UL mark, and only where the installation is genuinely near fuel, solvent or dust, for a hazardous-area rating. Endress+Hauser's Promag H 200 is the worked example, listing ATEX, IECEx and cCSAus with an intrinsically safe Ex ia option, and Class I Division 2 Groups A to D is the North American classification to ask about. Most of the utility-grade catalogue below needs none of this.

E+H Promag H 200 approvals

Food, beverage and pharma run a separate track

3-A Sanitary Standards, EHEDG and FDA-compliant wetted materials govern cleanability: compatibility with clean-in-place and steam-in-place, crevice-free geometry, a defined surface finish. That is not what NSF/ANSI/CAN 61 tests, which is chemical leaching into drinking water. A meter can be excellent on a dairy line and carry no NSF 61 listing at all, because it was never meant for a distribution system.

Anderson-Negele hygienic flow meters

Non-potable lines need none of it

Wastewater, reclaimed water and irrigation sit outside the scope of NSF 61 and 372, because those standards exist to protect drinking water. What matters instead is solids tolerance and turndown, which is why electromagnetic and ultrasonic designs dominate there; a mag meter has nothing in the bore to foul. In Ontario, metered effluent flow is usually a condition inside a facility's own Environmental Compliance Approval rather than a blanket statutory rule, so read your ECA rather than assuming either way.

McCrometer on mag meters in dirty water · Environmental Registry of Ontario 019-0773

CRN: almost every water meter is exempt in Ontario

O. Reg. 220/01 does not apply to a fitting or piping carrying liquids no more hazardous than water at 65 °C or less and 250 psi or less, and separately exempts buried water piping at 65 °C or less and 740 psi or less. A standard water service meter sits squarely inside that exemption and needs no Canadian Registration Number. A hotter process line, a higher-pressure line, or anything that is not water falls outside it and is worth a direct question to TSSA rather than a guess.

O. Reg. 220/01 · TSSA on CRN

Technologies

Compare measuring technologies

Start with the application and limitation. Open the evidence for accuracy, installation and sources.

Choose a measuring technology
Technology	Best for	Watch out
Positive displacement (nutating disc / oscillating piston)	Residential and small-commercial potable billing, 5/8"–2"	Water carries grit or sediment
Positive displacement (nutating disc / oscillating piston): evidence The full evidence
Single-jet	Very low-cost sub-metering and budget applications	Low-flow leak detection or long service life without recalibration is the priority; prefer multi-jet or positive displacement
Single-jet: evidence The full evidence
Multi-jet	Residential and small commercial billing needing better low-flow performance than single-jet without moving to positive displacement or ultrasonic cost	Water is dirty or gritty
Multi-jet: evidence The full evidence
Turbine	Larger commercial, institutional and mainline billing (1.5" and up)	Flows are frequently very low relative to the meter's size (oversizing risk)
Turbine: evidence The full evidence
Woltmann (helix turbine)	Bulk and mainline metering at larger diameters where a helical-rotor turbine design is offered	Flows are frequently very low relative to the meter's size
Woltmann (helix turbine): evidence The full evidence
Insertion paddlewheel	Retrofitting flow monitoring onto an existing process or utility line without cutting it, where legal-for-trade billing accuracy is not required	Application is revenue billing requiring AWWA/ISO 4064 accuracy classes
Insertion paddlewheel: evidence The full evidence
Compound	Mixed-use buildings and services combining domestic and fire-protection flow through one connection, 2"–8"	Service is single-purpose, domestic-only or fire-only, where a correctly sized turbine or positive-displacement meter is cheaper and simpler
Compound: evidence The full evidence
Electromagnetic (mag, incl. battery-powered)	Dirty or turbid raw or process water	No power source is practical and a battery-service interval is unacceptable
Electromagnetic (mag, incl. battery-powered): evidence The full evidence
Ultrasonic (inline, transit-time)	New utility billing installs at any size 5/8" and up where turndown, leak-detection sensitivity and zero wear-driven drift matter	No power and battery servicing is acceptable at all
Ultrasonic (inline, transit-time): evidence The full evidence
Ultrasonic (clamp-on)	Retrofitting flow measurement or verification onto existing pipe without a shutdown	Need billing-grade accuracy at low cost (compact units like Keyence FD-Q are explicitly below process-grade accuracy)
Ultrasonic (clamp-on): evidence The full evidence
Vortex	Steam, gas and liquid process flows in industrial facilities, especially where the same instrument type is wanted across multiple services	Application is potable or utility water billing at typical municipal velocities and sizes, where mag or ultrasonic almost always fit the straight-run and low-flow requirements better
Vortex: evidence The full evidence
Coriolis	Custody-transfer or high-value fluid metering	Application is general potable or utility water flow or volume billing at typical municipal pipe sizes, where cost and the size ceiling rule Coriolis out long before mag or ultrasonic would be
Coriolis: evidence The full evidence
Other or not stated	not stated	You need a stated measuring principle for a specification or a by-law submission.
Other or not stated: evidence The full evidence

Technology families and detailed comparison

Inferential meters count physical motion. A nutating disc, an oscillating piston, a jet wheel, a turbine rotor or an insertion paddlewheel moves with the water, and the register counts the movement. They need no power to register a total and they are cheap at small sizes, but they wear, they jam on grit, and they read low as they age.

The other family has nothing moving in the bore. An electromagnetic meter reads the voltage a conductive liquid induces as it crosses a magnetic field; an ultrasonic meter times sound pulses running with and against the flow. Neither wears, both need power, and both cost more at 5/8" than a disc meter does. The revenue standard covering them is AWWA C715, not C750, which is a separate standard for transit-time process flowmeters.

Side by side

Water meter technologies compared on moving parts, size, accuracy, straight run, pressure loss, dirty-water tolerance and power
Technology	Moving parts	Typical sizes	Accuracy, as stated	Straight run	Pressure loss	Dirty water	Power
Positive displacement, nutating disc	Yes	5/8" to 2" (C700 and C710)	±1.5% in normal flow	None required	Highest of the mechanical types	Poor	None, or battery for an electronic register
Positive displacement, oscillating piston	Yes	5/8" to 1" (C700)	±1.5% in normal flow	None required	7.0 psi at 20 USGPM on 5/8" (Sensus SR II)	Poor	None, or battery
Single jet	Yes	5/8" to 6" (C712)	±1.5% claimed by DAE	Not stated	Not stated	Poor	None, or battery
Multi jet	Yes	5/8" to 2" (C708)	±1.5% in normal flow (Sensus PMM)	Not stated	14.0 psi at 30 USGPM on 3/4"	Poor	None, or battery
Turbine, including Woltmann	Yes	3/4" to 20" (C701)	Not stated in the sources reviewed	Not stated in the sources reviewed	Not stated in the sources reviewed	Moderate with a strainer	None, or battery
Insertion paddlewheel	Yes	1/2" to 36" (GF 2536)	Linearity ±1%, repeatability ±0.5%	Not stated in the datasheet	Negligible	Poor to moderate	Loop or external
Compound	Yes, two elements	2" to 8" (C702)	Not stated in the sources reviewed	Not stated in the sources reviewed	Not stated in the sources reviewed	Poor to moderate	None, or battery
Electromagnetic	No	DN15 to DN2000 by model	0.2% to 0.4% of rate (MAG 8000)	Down to 0D, verified to MI-001	Insignificant to about 0.36 psi	Good	Mains, loop, or D-cell packs
Ultrasonic, inline	No	1/2" to 20" (C715)	±1.5% normal, ±3% extended low flow	None to meet C715; 5D recommended	Not stated in the sources reviewed	Good, with empty-pipe and reverse-flow flags	Long-life internal battery
Ultrasonic, clamp-on	No	1/4" to 394" by model	±0.5 to ±1% (FS230); ±2 to ±3% of reading (E+H W400)	10D up and 5D down typical; 2D with E+H FlowDC	None	Sensitive to scale and entrained air	Mains or loop
Vortex	No, the bluff body is fixed	Not sized in this research	Not stated in the sources reviewed	15D up and 5D down	Not stated in the sources reviewed	Not stated in the sources reviewed	Mains or loop
Coriolis	No	Practically capped near 10"	Very high, no model figure sourced	Effectively none	Higher than mag or ultrasonic	Not stated in the sources reviewed	Mains or loop

Sizes and standards from the AWWA standards list. Pressure-loss figures from the Sensus SR II and Sensus PMM datasheets. Clamp-on figures from Siemens FS230 and E+H Prosonic Flow W400. Where a row says a value is not stated in the sources reviewed, no datasheet in this research gave it, and we would rather leave it blank than guess.

Catalogue

Compare the catalogue

Eight meters to start: favourites, then fuller records. Filter, search or show all; compare up to three.

How to read the catalogue

Three things are worth knowing before you read a row. Kamstrup's flowIQ 2200 only exposes a register we can read in the Encoded Output hardware variant, which implements the Sensus UI-1203 and UI-1204 specification and is also compatible with Neptune ProRead and E-CODER reading systems; the RF and Cellular variants of the same meter do not. Mueller's SSM calls its protocol an industry-standard encoder without naming Sensus or Neptune, so treat it as a Signalizer candidate to confirm rather than a proven one. And Hersey is no longer a brand, since Mueller's own brand list has dropped it and herseymeters.com is a parked error page, so the old Hersey turbine and compound role now sits with Mueller's MVR.

Price bands are comparative judgements by product class rather than quoted figures, because none of these manufacturers publish list prices for this equipment. Where we found a public reseller price, we kept it in our own notes to justify the band, and never print it here as though it were a quote.

Search, filtering and comparison need JavaScript. All catalogue rows and full specifications are readable below.

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Search the catalogue58 meters and accessories

Compare	Manufacturer	Model	Technology	Sizes	Outputs	Potable	Max °C	Price	Quantify fit
	DAE	AS250UAS-Series Single-Jet Water Meter	Single jet	1"	Pulse	no	40	$	Consumption PulseRate No route
Full specification
	GF Signet	2536 Rotor-XPaddlewheel Flow Sensor	Paddlewheel, insertion	1/2-36 (PP/PVDF); 1/2-4 (PVC body)	Pulse	NSF 61	85	$$	Consumption No routeRate Pulse-derived
Full specification
	GF Signet	2537Paddlewheel Flowmeter	Paddlewheel, insertion	1/2-8"	Pulse, Other, 4-20 mA	NSF 61	85	$$	Consumption PulseRate 4-20 mA
Full specification
	Neptune	MACH 10ultrasonic (residential/intermediate)	Ultrasonic, inline	5/8", 3/4", 1", 1-1/2", 2"	Encoder register	NSF 61	50	$$	Consumption SignalizerRate 4-20 mA
Full specification
	Neptune	MACH 10 C&Iultrasonic (commercial/industrial, large-size)	Ultrasonic, inline	3", 4", 6", 8", 10", 12"	Encoder register	NSF 61	65	$$$	Consumption SignalizerRate 4-20 mA
Full specification
	Keyence	FD-Q seriesclamp-on flow sensor	Ultrasonic, clamp-on	1/4 (8A), 3/8 (10A), 1/2 (15A), 3/4 (20A), 1 (25A), 1 1/4 (32A), 1 1/2 (40A), 2 (50A)	Pulse, 4-20 mA, Other	not stated	85	$$$	Consumption PulseRate 4-20 mA
Full specification
	Badger Meter	E-Series Ultrasonic(Cold Water Stainless Steel)	Ultrasonic, inline	5/8", 5/8 x 3/4, 3/4", 1"	Encoder register	NSF 61	60	$$	Consumption SignalizerRate No route
Full specification
	Badger Meter	ModMAG M2000Electromagnetic Flow Meter	Electromagnetic	1/2", 3/4", 1", 1-1/2", 2", 3", 4", 6", 8"	4-20 mA, Modbus, Pulse, Encoder register	NSF 61	150	$$$$	Consumption PulseRate 4-20 mA
Full specification
	Badger Meter	Recordall Compound Series	Compound	2", 3", 4", 6"	Encoder register	NSF 61	40.6	$$$	Consumption SignalizerRate No route
Full specification
	Badger Meter	Recordall Disc Series(Models 25/35/55/70/120/170)	Positive displacement	5/8", 5/8 x 3/4, 3/4", 1", 1-1/2", 2"	Encoder register	NSF 61	26.7	$	Consumption SignalizerRate No route
Full specification
	Badger Meter	Recordall Turbo Series(Models 160–6200)	Turbine	1-1/2", 2", 3", 4", 6", 8", 10"	Encoder register	NSF 61	48.9	$$	Consumption SignalizerRate No route
Full specification
	DAE	MJ-100 / MJ-seriesMulti-Jet Water Meter (NSF-61 lead-free)	Multi jet	1"	Pulse	NSF 61	50	$	Consumption PulseRate No route
Full specification
	Endress+Hauser	Promag L 400Proline / 5L4C	Electromagnetic	1-90"	4-20 mA, Pulse, Modbus, Other	NSF 61	90	$$$$	Consumption PulseRate 4-20 mA
Full specification
	Endress+Hauser	Promag W 10Proline / 5WBB	Electromagnetic	1-90"	4-20 mA, Pulse, Modbus, Other	NSF 61	90	$$$	Consumption PulseRate 4-20 mA
Full specification
	Endress+Hauser	Promag W 400Proline / 5W4C	Electromagnetic	1-120"	4-20 mA, Pulse, Modbus, Other	NSF 61	90	$$$$	Consumption PulseRate 4-20 mA
Full specification
	GF Signet	2551Magmeter Flow Sensor (insertion)	Electromagnetic	1/2-36"	Other, 4-20 mA	NSF 61	85	$$$	Consumption No routeRate 4-20 mA
Full specification
	Kamstrup	flowIQ 2200(RF / Encoded Output / Cellular hardware variants)	Ultrasonic, inline	5/8 x 1/2, 5/8 x 3/4, 3/4", 1"	Encoder register, M-Bus, Other	NSF 61	50	$$	Consumption SignalizerRate No route
Full specification
	Mueller Systems	Mueller 420 BronzeSeries positive-displacement meter	Positive displacement	5/8"	Encoder register, Other	NSF 61	37.8	$	Consumption Not establishedRate No route
Full specification
	Mueller Systems	Mueller MVRmagnetic-drive vertical turbine meter (MVR30/50/100/160/350/650/1300)	Turbine	3/4", 1", 1-1/2", 2", 3", 4", 6"	Other	NSF 61	54.4	$$$	Consumption Not establishedRate No route
Full specification
	Mueller Systems	Mueller SSMSolid State Meter, 5/8 inch to 1 inch (a separate SSM-Large datasheet covers 1-1/2 inch to 2 inch, not spec'd here)	Ultrasonic, inline	5/8 x 3/4, 3/4 short, 3/4 long, 1"	Encoder register	NSF 61	50	$$	Consumption SignalizerRate No route
Full specification
	Neptune	HP TurbineHigh Performance	Turbine	1-1/2", 2", 3", 4", 6", 8", 10"	Encoder register	NSF 61	26.7	$$$	Consumption SignalizerRate Not established
Full specification
	Neptune	T-10nutating disc	Positive displacement	5/8", 3/4", 1", 1-1/2", 2"	Encoder register	NSF 61	26.7	$$	Consumption SignalizerRate 4-20 mA
Full specification
	Seametrics	WMX101 / WMX104WMX-Series Flanged Magmeter	Electromagnetic	3", 4", 6", 8", 10", 12"	Pulse	NSF 61	54	$$$	Consumption PulseRate No route
Full specification
	Sensus	accuSTREAMWater Meter	Positive displacement	5/8", 3/4", 1"	Encoder register	NSF 61	26.7	$	Consumption SignalizerRate No route
Full specification
	Sensus	iPERL+Smart Water Meter	Electromagnetic	5/8", 5/8 x 3/4, 3/4", 1"	Encoder register	NSF 61	26.7	$$	Consumption SignalizerRate No route
Full specification
	Sensus	OMNI C²Compound Water Meter	Compound	1-1/2", 2", 3", 4", 6", 8", 10"	Pulse, Encoder register	NSF 61	26.7	$$$	Consumption PulseRate No route
Full specification
	Sensus	OMNI F²Fireline Water Meter	Turbine	4", 6", 8", 10"	Pulse, Encoder register	NSF 61	26.7	$$$$	Consumption PulseRate No route
Full specification
	Sensus	OMNI T²Turbo Water Meter	Turbine	1-1/2", 2", 3", 4", 6", 8", 10"	Pulse, Encoder register	NSF 61	26.7	$$$	Consumption PulseRate No route
Full specification
	Sensus	SR IIWater Meter (register and output reference)	Positive displacement	5/8", 3/4", 1"	Encoder register	NSF 61	26.7	$	Consumption SignalizerRate No route
Full specification
	Siemens	SITRANS FM MAG 5100 W(electromagnetic sensor + MAG 5000 / MAG 6000 / MAG 6000 I transmitter)	Electromagnetic	1/2", 3/4", 1", 1-1/2", 2", 4", 6", 8", 12"	Pulse, HART, Modbus, Other	NSF 61	70	$$$$	Consumption PulseRate Not established
Full specification
	Siemens	SITRANS FM MAG 8000battery-operated water meter (Basic/Advanced; 7ME6810 abstraction & distribution, 7ME6820 CT revenue & bulk)	Electromagnetic	1", 2", 4", 6", 8"	Pulse, Modbus, Other	NSF 61	70	$$$	Consumption PulseRate Read-only Modbus
Full specification
	DAE	V-SeriesVertical-Mount Water Meter	Other	3/4", 1"	Pulse	not stated	50	$	Consumption PulseRate No route
Full specification
	DAE	WP-200 / WP-seriesWoltmann (Helix) Water Meter	Woltmann	2", 2-1/2"	Pulse	not stated	40	$$	Consumption PulseRate No route
Full specification
	Endress+Hauser	Picomagcompact electromagnetic flowmeter	Electromagnetic	1/2-2"	4-20 mA, Pulse, Other	not stated	70	$$$	Consumption PulseRate 4-20 mA
Full specification
	Endress+Hauser	Prosonic Flow W 400Proline / 9W4B	Ultrasonic, clamp-on	1/2-160"	4-20 mA, Pulse, Modbus	not stated	130	$$$$	Consumption PulseRate 4-20 mA
Full specification
	GF Signet	2552Metal Magmeter Flow Sensor	Electromagnetic	2-102"	Other, 4-20 mA	no	not stated	$$$	Consumption No routeRate 4-20 mA
Full specification
	Kamstrup	flowIQ 3200(KWM3231 platform, shared with flowIQ 2200; MID/OIML R49 type DK-0200-MI001-047)	Ultrasonic, inline	1", 1-1/4", 1-1/2", 2"	M-Bus, Other	not stated	50	$$	Consumption No routeRate No route
Full specification
	Keyence	FD-H seriesclamp-on flow sensor	Ultrasonic, clamp-on	1/4-3/8 (8-10A), 1/2-3/4 (15-20A), 1-1 1/4 (25-32A)	Pulse, 4-20 mA, Other	not stated	85	$$$	Consumption PulseRate 4-20 mA
Full specification
	Keyence	FD-R seriesclamp-on flow meter	Ultrasonic, clamp-on	1 1/2-2", 2 1/2-3", 4-5", 6-8"	Pulse, 4-20 mA, Other	not stated	120	$$$	Consumption PulseRate 4-20 mA
Full specification
	Keyence	FD-X seriesclamp-on micro flow sensor	Ultrasonic, clamp-on	tube 6mm, tube 8mm, 3/8-1/2"	Pulse, 4-20 mA, Other	not stated	100	$$	Consumption Not establishedRate 4-20 mA
Full specification
	Neptune	HP PROTECTUS III (S)stainless-steel fire-service compound	Compound	4", 6", 8", 10"	Encoder register	NSF 61	not stated	$$$$	Consumption SignalizerRate Not established
Full specification
	Neptune	TRU/FLOcompound	Compound	2", 3", 4", 6", 6x8	Encoder register	not stated	26.7	$$$	Consumption SignalizerRate Not established
Full specification
	Seametrics	AG3000Irrigation Magmeter	Electromagnetic	3", 4", 6", 8", 10", 12"	Pulse, 4-20 mA, HART, Modbus	not stated	60	$$$	Consumption PulseRate 4-20 mA
Full specification
	Seametrics	MJ / MJHMJH-Series Multi-Jet Pulse Meter	Multi jet	3/4", 1", 1-1/2", 2"	Pulse, Other	not stated	40	$$	Consumption PulseRate No route
Full specification
	Seametrics	TX80 (TX81 / TX82)TX80-Series Insertion Turbine Flow Sensor	Turbine	1-1/2", 2", 3", 4", 6", 8"	Pulse	not stated	93	$$	Consumption No routeRate Pulse-derived
Full specification
	Seametrics	WMP101 / WMP104WMP-Series Plastic-Bodied Magmeter	Electromagnetic	1", 2", 3"	Pulse	not stated	54	$$$	Consumption PulseRate No route
Full specification
	Siemens	SITRANS FS230clamp-on ultrasonic flowmeter (FST030 transmitter; FST020 basic-application transmitter also available)	Ultrasonic, clamp-on	not stated	Pulse, 4-20 mA, Modbus, Other	not stated	120	$$$	Consumption PulseRate 4-20 mA
Full specification
	Kamstrup	flowIQ 3100(Wireless / Wired M-Bus)	Ultrasonic, inline	not stated	M-Bus, Other	not stated	not stated	$$	Consumption Not establishedRate No route
Full specification
	ScadaMetrics	Signalizer Model EMP Accessory	Other	not stated	4-20 mA, Pulse, Other	not stated	85	$$	Consumption PulseRate 4-20 mA
Full specification
	Endress+Hauser	Prosonic Flow 93T AccessoryProline (portable)	Ultrasonic, clamp-on	1/2-2 1/2", 4-160"	4-20 mA	not stated	170	$$$$	Consumption No routeRate 4-20 mA
Full specification
	Badger Meter	HR-E LCD Encoder AccessoryHigh Resolution (register and output reference)	Other	not stated	Encoder register	not stated	60	$	Consumption SignalizerRate No route
Full specification
	Neptune	E-CODER Accessoryabsolute encoder register	Other	not stated	Encoder register	not stated	65	$	Consumption SignalizerRate 4-20 mA
Full specification
	Neptune	E-CODER)R900i Accessoryintegrated encoder + radio endpoint	Other	not stated	Other	not stated	65	$$	Consumption No routeRate No route
Full specification
	Neptune	ProRead (ARB VI) Accessoryabsolute encoder register	Other	not stated	Encoder register	not stated	70	$	Consumption SignalizerRate No route
Full specification
	Badger Meter	HR-LCD Pulse Scaled Register AccessoryHR-E	Other	not stated	Pulse	not stated	60	not stated	Consumption PulseRate No route
Full specification
	GF Signet	9900 AccessoryTransmitter	Other	not stated	4-20 mA, Modbus, Pulse	not stated	not stated	$$	Consumption PulseRate 4-20 mA
Full specification
	Neptune	R900 AccessorySystem	Other	not stated	Other	not stated	not stated	not stated	Consumption No routeRate No route
Full specification
	Sensus	OMNI+ Electronic Register (pulse output option) Accessory	Other	not stated	Encoder register, Pulse	not stated	not stated	not stated	Consumption PulseRate No route
Full specification

Reference

Where to buy · distributors and checklist

Neptune, GF Signet, Endress+Hauser and Keyence all have Canadian offices, and Keyence sells direct with no distributor at all. Sensus splits Ontario between two distributors, so getting the territory right matters before you ask anyone for a price. DAE has no Canadian entity and sells through Amazon.ca and its own store, which is exactly why it turns up on tight budgets. Mueller has a well-documented Canadian presence for hydrants and valves and no confirmed Canadian channel for its meters, so expect to go through a general waterworks distributor there.

Two names to strike off the list. Davis Controls in Oakville is the natural guess for Ontario flow instrumentation, and its own brands page carries none of the manufacturers in this catalogue. Guillevin produced no page confirming it stocks any of them either, so treat that route as unverified rather than available.

Manufacturer	Canadian entity	How to buy	Distributors in Canada	What they make
Badger Meter, Inc.	No Canadian office address published	Badger Meter runs an en-ca site but sells into Canada through the independent distributor below rather than a Badger-branded Canadian office; we found no Badger Meter-owned Canadian office street address. Search results suggest a second Canadian channel, ICONIX Waterworks and Corix, carrying Badger Meter product lines, but that product-line page returns a 404, so treat it as unconfirmed.	Westech Industrial Ltd. Eastern Canada (branch: Burlington, ON; corporate HQ: Calgary, AB)The site states "Available distribution: Eastern Canada" for Badger Meter's Industrial Metering technologies.	utility cold-water meters (nutating disc, turbine, compound, ultrasonic) and industrial/process electromagnetic flow meters (ModMAG)
DAE Controls LLC (DAE water meters)	No Canadian office, warehouse, or distributor found	DAE Controls LLC is a US company with no confirmed Canadian legal entity, office or dedicated distributor. daecontrol.com sells direct from the US. Amazon.ca is the only confirmed Canadian purchase route, and only for the AS, MJ and V lines. Confirm cross-border shipping, duty and lead time before quoting a client on any DAE meter, especially the larger cast-iron WP-series.	Amazon.ca national (e-commerce)A live Canadian purchase route for the AS-series, MJ-series and V-series; we checked the individual product links (for example https://www.amazon.ca/DAE-AS130U-50P-Pulse-Output-Measuring/dp/B01DAXQI3G , https://www.amazon.ca/DAE-MJ-75m-Potable-Couplings-Output/dp/B08CYDQ41L , https://www.amazon.ca/DAE-V-75-Vertical-Couplings-Measuring/dp/B07D915GPM ). WP-series (Woltmann, 2 in. and up) availability on Amazon.ca is not confirmed.	Budget-to-mid single-jet, multi-jet, vertical-mount, and Woltmann (helix) water meters with reed-switch pulse output, sold direct and via Amazon
Endress+Hauser	Endress+Hauser Canada Ltd., 1244 International Blvd., Burlington, ON L7L 0K2 (branch offices in Montreal QC, Calgary AB, and Edmonton AB)	Buying is a mix of direct E+H sales/service and channel/authorized-service partners. For the Promag and Prosonic Flow instruments in this catalogue, go direct to Endress+Hauser Canada (Burlington, ON) for a quote and configuration support. No public list pricing found; head-office phone +1-905-681-9292 / toll-free +1-800-668-3199.	Endress+Hauser Canada Ltd. (direct) ON/QC/AB, national coveragePrimary channel for Proline process instruments; in-house ISO 17025 / ISO 9001:2015 calibration labs and service centres. Newark / element14 Canada national (online)Electronic-component distributor carrying select E+H catalogue items; not the primary channel for full Proline process instruments.	Process instrumentation for flow, level, liquid analysis, pressure and temperature measurement, including electromagnetic (Proline Promag) and ultrasonic (Proline Prosonic Flow) flowmeters with drinking-water approvals
GF Signet (Georg Fischer Signet LLC / GF Piping Systems)	GF Piping Systems Canada (Georg Fischer's Canadian web presence)	We could not confirm a dedicated Canadian distributor for Signet instrumentation, or a Canadian legal-entity address or phone number. Davis Controls (Oakville, ON) does not carry GF Signet or Georg Fischer, per its own brand list. US distributors including Instrumart, Burt Process Equipment, Serv-A-Pure and Streamline Filtration all ship into Canada but are not Canadian entities, so confirm duty and lead time before quoting a client.	GF Piping Systems Canada nationalGeorg Fischer's own Canadian storefront lists Signet as a brand. The pages carry no address, phone number or distributor list, so contact them directly to confirm Signet instrumentation stock and lead times. Process & Steam Specialties Southern OntarioA confirmed Georg Fischer distributor for Southern Ontario, but confirmed for GF's plastic valves only. We could not confirm that it carries Signet flow instruments (2536, 2537, 2551, 2552, 9900). Phone (905) 828-9900 or 1-800-811-2175.	Flow, level and liquid-analysis process instrumentation (paddlewheel, magmeter, transmitters). It is the instrumentation brand of Georg Fischer Piping Systems.
Kamstrup A/S	No standalone Canadian entity confirmed; sold through waterworks distributors	Kamstrup does not publish list pricing. Water meters are sold through regional distributors and system integrators. In Canada the clearest lead is ICONIX Waterworks Canada; we could not confirm whether EJ Prescott and Team EJP cover Canada or only the US. For the Signalizer workflow, only the flowIQ 2200 Encoded Output (EO) hardware variant is relevant, so confirm that exact SKU is what a distributor has in stock rather than the RF or Cellular variants.	ICONIX Waterworks Canada Canada (national, per page title)Kamstrup is named on a dedicated ICONIX 'manufacturer spotlight' page for Canada. That page did not render its full content for us, so scope and regional detail beyond the page's existence are unconfirmed. EJ Prescott / Team EJP Canada, unconfirmedThe page lists a 'Kamstrup Water Meters' product line. EJ Prescott is a US waterworks distributor group, and press coverage describes 'Team EJP' ending a long-standing relationship with a competing meter manufacturer to represent Kamstrup, but this page does not itself state Canadian coverage.	Smart utility metering: ultrasonic residential and commercial water meters (the flowIQ range) with integrated Wireless M-Bus, NB-IoT cellular, Sensus-protocol Encoded Output and Kamstrup linkIQ communication. Kamstrup also makes heat and energy meters (MULTICAL, ULTRAFLOW), which sit outside this water-meter catalogue; we found no water-billing use of them in Canada.
Keyence Corporation	Keyence Canada Inc., 6775 Financial Dr., Suite 400, Mississauga, ON L5N 0A4	Keyence sells direct in Canada, stating that 'there is no need to go through distributors.' Technically trained sales engineers visit customers on site with demo units, and orders placed by 2pm ET typically ship the same day. There is no public list pricing, so contact Keyence Canada for a quote.	sells direct, no Canadian distributor found	Industrial sensors and process instrumentation, including clamp-on ultrasonic flow sensors for OEM/process duty (not billing-grade utility water meters)
Mueller Systems, LLC (water metering division of Mueller Water Products, Inc.)	We found no Canadian office, contact or distributor on muellersystems.com, the metering-division site. Mueller Water Products' Canadian arm, 'Mueller Canada', is described on muellerwaterproducts.com/our-brands as supplying fire hydrants, gate valves, tapping sleeves, butterfly and check valves, couplings and castings; water meters are not in that Canadian product scope. 'Mueller Co. Water Products Division (Canada)' at muellercompany.com/en-ca also appears to be the hydrant and valve division rather than Mueller Systems metering. Treat Mueller Systems water-meter availability in Canada as unconfirmed until a distributor states it directly.	Mueller Systems sells through plumbing and waterworks distributors and does not publish list pricing. We could not confirm a Canadian distributor by name for Mueller Systems metering products. Mueller Water Products' Canadian presence (Mueller Canada, muellercompany.com/en-ca) is documented for valves and hydrants, not meters. Verify with a named Canadian waterworks distributor before quoting.	sells direct, no Canadian distributor found	Utility cold-water meters: positive-displacement (400/420/435/452/500 series), solid-state ultrasonic (SSM), vertical-turbine (MVR), fire-service and hydrant meters, plus magnetic (HbMAG) and check-valve products for light-commercial, commercial and industrial service. The historic 'Hersey' brand is not listed among Mueller Water Products' current brands (muellerwaterproducts.com/our-brands), and herseymeters.com no longer resolves to a working site. Hersey's product lines appear to have been folded into the Mueller Systems catalogue, with the MVR as the current vertical-turbine and compound-replacement line, rather than sold separately.
Neptune Technology Group	Neptune Technology Group (Canada) Ltd., 7275 West Credit Avenue, Mississauga, ON L5N 5M9	Neptune does not publish list pricing and does not sell direct online. It sells through regional distributors and its own project offices, with quotes through a Territory Manager (neptunetg.com/sales/). We found no public list price for any Neptune product.	Neptune Technology Group (Canada) Ltd. national (Mississauga, ON head office)Neptune's own Canadian subsidiary. It runs turnkey AMR/AMI project delivery and large-meter programs rather than an open parts counter. Phone (905) 858-4211, per neptunetg.com/sales/. Evan Supply Limited ONOntario distributor stocking Neptune residential, commercial, industrial and fire-service meters, registers and RF endpoints. Its site states over 20 years as a Neptune distributor in Ontario. Wolseley Waterworks ON (national branch network)The product listing page confirms Neptune T-10 (small and intermediate) and turbine-type cold-water meters. Wolseley runs many Ontario branches, though we could not confirm a specific Ontario branch address. Flow Systems BC / YTStates that it is the exclusive Neptune distributor for British Columbia and the Yukon. Not an Ontario source; listed here for national coverage.	Utility cold-water meters (positive-displacement, turbine, compound, ultrasonic), absolute-encoder registers, and R900/LoRaWAN/cellular AMR-AMI endpoints; over 30 years of dedicated Canadian operations with coast-to-coast project offices.
ScadaMetrics	not stated	Sold direct from the ScadaMetrics eStore (in stock at retrieval). One hardware model; the per-brand PDFs are DIP-switch personality sheets, not different products. Not compatible with Neptune R900i integrated-radio registers.	Flow Systems (BC) BCA confirmed Canadian reseller. Ontario buyers order direct from the ScadaMetrics eStore.	Encoder-to-signal converters for utility water meters: the Signalizer (Model EMP) reads Neptune, Sensus, Badger, Elster and other encoder registers and outputs a dry-contact pulse, a 4-20 mA flow-rate loop and an alarm contact, with a pass-through for the utility's AMI endpoint.
Seametrics Incorporated	No Canadian subsidiary or office found; served via an independent Canadian distributor	We found no Seametrics distributor in Ontario. The one verified Canadian distributor, Jadler Industries, is in Calgary, AB. Davis Controls (Oakville, ON) does not carry Seametrics. US distributors including Instrumart, AWM Instruments and Valin ship into Canada but are not Canadian entities.	Jadler Industries AB (Calgary)Confirmed Canadian Seametrics distributor at 1345 Highfield Crescent, Calgary, AB T2G 5N2. It stocks the iMAG4700, IP100/IP200 and PS9800 lines. The page does not itemize the WMP, MJ, AG3000, TX80 or WMX models listed here. Note the location: Alberta, not Ontario.	Magnetic and mechanical (multi-jet, turbine) flow meters and environmental sensors for irrigation, industrial, and municipal water applications
Sensus (a Xylem brand)	No Canadian office address published	Sensus water products reach Canada through Xylem Canada and the independent distributors below. We found no Xylem Canada or Sensus-owned Canadian office street address in public sources, so go through those distributors or the general Canadian contact form on Xylem's Sensus pages.	KTI Limited ON (excl. GTA & Northern Ontario) / QCListed as the Sensus water-products distributor for most of Ontario and Quebec. Aurora, ON. Source: the Sensus international Find-a-Distributor list (2025). WAMCO Waterworks Greater Toronto Area & Northern Ontario onlyListed as the Sensus water-products distributor for the GTA and Northern Ontario specifically. Barrie, ON. Source: the Sensus international Find-a-Distributor list (2025).	utility cold-water meters (positive-displacement, electromagnetic, compound, turbine, fire-service) and their AMR/AMI registers
Siemens AG (Digital Industries, Process Automation, SITRANS flow instrumentation)	Siemens Canada Limited is the national subsidiary, though we could not confirm a Canadian office or contact page for the SITRANS process-instrumentation business from primary sources.	Siemens sells SITRANS instrumentation through its own Digital Industries sales channel and a network of solution partners and system integrators. The siemens.com/ca/en product and company pages returned 404s every time we tried them, so we could not retrieve a Canada-specific SITRANS distributor or office page. Confirm directly with a Siemens Canada sales contact before quoting lead times.	sells direct, no Canadian distributor found	Industrial flow measurement: electromagnetic (SITRANS FM MAG series) and ultrasonic clamp-on (SITRANS FS/FST) flowmeters used for water/wastewater treatment, distribution, custody transfer and general process industry.

What to send a distributor

Quantify's own checklist, not a manufacturer or standards document. Send all nine and the quote comes back right the first time.

Information to send a distributor
Include	Details
Pipe size.	Nominal size and schedule or wall, such as 3/4" NPT, 2" flanged, Schedule 40.
Flow rate.	Minimum, typical and maximum expected flow, with the unit written out: L/min, m³/h or USGPM.
Register units.	m³, US gallons, Imperial gallons, litres or ft³, and say whether the billing system fixes it.
Output signal.	Pulse and the pulse weight, 4-20 mA, encoder and which protocol, or read-only Modbus.
Potable or not, hot or cold.	This sets NSF 61 and 372 and the temperature class.
Orientation and installation.	Horizontal, vertical or any, and how much straight run you have upstream and downstream.
End connections.	Threaded, flanged, sweat or coupling, and the material.
Register type.	Mechanical odometer, electronic LCD or absolute encoder, and whether it has to be AMR-ready.
Power.	Battery and the design life you need, loop-powered, or external 24 VDC or 120 VAC, and whether power exists at the meter position at all.

Glossary · 103 terms

3-A Sanitary Standards: North American hygienic-design standard for equipment in contact with food, dairy and beverage product. It governs cleanability (CIP and SIP compatibility, crevice-free design, defined surface finish) rather than drinking-water chemical leaching, so it is a separate certification track from NSF/ANSI/CAN 61. See also EHEDG, FDA-compliant wetted materials
4-20mA: An analog current-loop signal reporting instantaneous flow rate (not a running total), scaled linearly so 4mA represents zero/minimum flow and 20mA represents the transmitter's configured maximum flow. A running total is obtained downstream by integrating (sampling and summing) the rate signal over time, which introduces its own error if the sampling interval is coarse relative to how fast the real flow rate changes. See also Loop-powered (2-wire transmitter), 4-wire transmitter
4-wire transmitter: A 4-20mA transmitter with separate power terminals from its signal terminals, freeing the current loop from also having to power the device's electronics. See also Loop-powered (2-wire transmitter), 4-20mA
4–20 mA (current loop): An analog signal standard where a continuously varying current between 4 and 20 milliamps represents a measured value across its range (e.g., 4 mA = zero flow, 20 mA = maximum rated flow), widely used to send an instantaneous flow-rate signal to a PLC or SCADA system. See also encoder register, loop-powered
Accuracy: How closely a meter's reported volume matches the true volume that passed through it, usually expressed as a percentage of reading (for example ±1.5%). Accuracy is not constant across a meter's whole flow range; it is normally specified per flow band (see Q1–Q4). See also turndown, Q1, Q2, Q3, Q4
accuracy class (ISO 4064 / OIML R49): Class 1: MPE of ±1% in the upper flow zone (Q2–Q4) for water 0.1–30°C (±2% above 30°C), and ±3% in the lower flow zone (Q1–Q2), regardless of temperature. Class 2: MPE of ±2% in the upper flow zone for 0.1–30°C water (±3% above 30°C), and ±5% in the lower flow zone. The manufacturer specifies which class a meter meets. See also ISO 4064, OIML R49, Q1/Q2/Q3/Q4
AMI (Advanced Metering Infrastructure): A metering system that automatically and continuously collects meter data (often on a fixed radio network) and sends it back to the utility or building owner, typically supporting frequent (e.g., hourly) reads without a person visiting each meter. See also AMR, endpoint
AMR (Automated Meter Reading): A metering system that collects meter data automatically, usually through a drive-by or walk-by radio read rather than a continuous fixed network. It is a simpler and usually cheaper step up from manual reading, and a step below full AMI. See also AMI, endpoint
ARB: Neptune's family of absolute-encoder register protocols/hardware generations (ARB III, IV, V, ProRead = ARB VI, E-CODER = ARB VII). Newer E-CODER registers run in a basic mode equivalent to ProRead, or automatically switch to a higher-resolution 'E-CoderPLUS' mode (8-digit remote reads plus leak/tamper/reverse-flow flags) when paired with an R900/R450 radio endpoint. See also Encoder register (absolute encoder), E-CoderPLUS, ProRead
ATEX: European Union hazardous-area (explosive atmosphere) directive and certification scheme, the European equivalent of the North American Class I Division 1/2 system. Offered on some process-grade electromagnetic and ultrasonic flowmeters for installations near flammable vapours or dust. See also Class I Division 2, intrinsically safe
AWWA C700: AWWA standard for cold-water meters, displacement type, with a metal alloy (bronze) main case. This is the classic residential and small-commercial positive-displacement meter. See also AWWA C710, AWWA standards
AWWA C701: AWWA standard for cold-water meters, turbine type, for customer service. It covers the Class I and Class II turbine meters used on larger commercial and industrial connections. See also AWWA standards
AWWA C702: AWWA standard for cold-water meters, compound type. A compound meter combines a displacement element for low flow and a turbine element for high flow in one body, for wide-range demand. See also AWWA standards
AWWA C704: AWWA standard for propeller-type meters in waterworks applications, meaning the propeller and Woltmann-style meters used on large mains and for bulk water measurement. See also AWWA standards
AWWA C707: AWWA standard for encoder-type remote-registration systems for cold-water meters. It governs the electronic encoder registers used for AMR and AMI reading, such as Neptune E-Coder, Sensus UI-1203 and Badger ADE-class registers. See also AWWA standards, AMI
AWWA C708: AWWA standard for cold-water meters, multi-jet type. These are velocity meters, common on residential and small-commercial services. See also AWWA standards, AWWA C712
AWWA C710: AWWA standard for cold-water meters, displacement type, with a plastic main case. Same displacement technology as C700, but with a technical-plastic (composite or polymer) body that is inherently lead-free. See also AWWA C700
AWWA C712: AWWA standard for cold-water meters, single-jet type: a simpler, lower-cost velocity meter than multi-jet. See also AWWA C708
AWWA C713: AWWA standard for cold-water meters, fluidic-oscillator type. These meters use a fluidic-oscillator mechanism with no moving parts in the flow path. See also AWWA standards
AWWA C715: AWWA standard for cold-water meters, electromagnetic and ultrasonic type, for revenue applications. It covers the electromagnetic and ultrasonic meters used for utility billing, such as the Neptune MACH 10. See also AWWA C750, AWWA C751
AWWA C750: AWWA standard for transit-time flowmeters in full closed conduits, meaning ultrasonic transit-time process flowmeters. It is distinct from C715, which covers electromagnetic and ultrasonic revenue meters. See also AWWA C715, AWWA C751
AWWA C751: AWWA standard for magnetic inductive flowmeters, meaning magnetic (mag) process flowmeters. See also AWWA C715, AWWA C750
AWWA M6: AWWA's reference manual, "Water Meters: Selection, Installation, Testing, and Maintenance." The fifth edition was published in 2012, and a 2018 addendum added testing guidance for meters conforming to AWWA C715 (electromagnetic and ultrasonic revenue meters). See also AWWA standards, AWWA C715
AWWA standards: The American Water Works Association publishes a separate meter standard per technology (the C700 series and related numbers), plus the M6 manual, "Water Meters: Selection, Installation, Testing, and Maintenance". "AWWA-compliant" is a technology and accuracy spec, not a health and safety certification like NSF 61. See also AWWA C700, AWWA M6
BACnet: The global data communication standard for building automation and control networks, providing vendor-independent interoperability among networked building equipment. No water meter in this catalogue has it natively. A meter reaches a BACnet network through a gateway or converter rather than a direct BACnet output on the meter itself. See also Modbus (RTU/TCP)
Clamp-on meter: A meter (almost always ultrasonic) whose sensors mount to the outside of an existing pipe rather than being inserted into the flow stream, so it can be installed and removed without cutting the pipe or stopping flow. See also transit-time, straight run
Class I Division 2: North American (NEC and CEC) hazardous-area electrical classification for locations where flammable gases or vapours may be present under abnormal conditions. It applies only to powered meters and transmitters installed near fuel, solvent or other flammable process lines. It is not a default requirement for utility water metering. See also ATEX, intrinsically safe
Compound meter: A meter that combines two measuring elements of different sizes (typically a small precision element for low flows and a larger element for high flows) with an automatic valve that switches between them, giving good accuracy across a very wide flow range. See also turndown, R-ratio
Contact bounce / debounce: The brief, rapid make-break oscillation a mechanical contact (like a reed switch) can produce right after closing. A debounce window in the counting device's firmware suppresses these as false extra pulses. Solid-state outputs don't bounce mechanically but may still need input filtering against electrical noise. See also Reed switch, Minimum pulse width
Coriolis meter: A meter that measures mass flow directly by detecting the Coriolis-force-induced twist in a vibrating tube as fluid passes through it; unlike most other meter types it does not need a separate density measurement to report mass, and can also report density. See also mag meter, vortex meter
CRN (Canadian Registration Number): Design-registration number issued by a provincial authority (TSSA in Ontario) confirming that a pressure-retaining component's design has been accepted for use at specified conditions, under the Boilers and Pressure Vessels regulation (O.Reg 220/01 in Ontario). Water-service fittings and piping carrying water at ≤65°C and ≤250 psi, or buried water piping at ≤65°C and ≤740 psi, are explicitly exempt, which covers most standard water meters. Check hotter, higher-pressure or non-water process lines with TSSA case by case. See also TSSA
Dry contact: A contact, mechanical or solid-state, that switches on its own without being 'wetted' by a voltage supplied at the switch itself. The receiving device supplies whatever voltage it needs to sense the open or closed state. Reed-switch and open-collector pulse outputs are both dry contact by this definition. See also Reed switch, Open collector
EHEDG: The European Hygienic Engineering & Design Group, the European counterpart to 3-A Sanitary Standards, covering hygienic equipment design for food, beverage and pharmaceutical processing. See also 3-A Sanitary Standards, FDA-compliant wetted materials
Electromagnetic flow meter (mag meter): A flow meter with no moving parts that measures the voltage induced as a conductive liquid moves through a magnetic field (Faraday's law); the induced voltage is proportional to flow velocity. Requires the liquid to be electrically conductive. See also transit-time, clamp-on
Empty-pipe detection: A feature (mainly on electronic and mag meters) that recognizes when the pipe is not fully flooded and suppresses or flags the reading, since most flow-measurement principles are unreliable or invalid when the pipe isn't full. See also low-flow cutoff
EN 14154: European harmonised standard for water meters, referenced by the EU Measuring Instruments Directive (MID), that (with EN ISO 4064) sets out the temperature-class system (T30/T50/T90/T130) used for cold- versus hot-water meters. See also T30 / T50 / T90 (temperature class)
Encoded vs. pulse: An encoder output is not a pulse output. A pulse tells a reading device 'one more unit happened'; an encoder tells it 'the total is now X.' You cannot wire an encoder register's clock, data and common pins into a generic pulse-counter input. The reading device has to speak the specific encoder protocol to decode a number from it. See also Encoder register (absolute encoder), Pulse output
Encoder register: An electronic register that stores the meter's exact reading as a digital value rather than only a mechanical position, so it can be read out precisely by an endpoint, a handheld reader, or a converter device instead of relying on someone reading a dial. See also endpoint, register, pulse output
Encoder register (absolute encoder): A register that digitizes the actual position of the meter's measuring element into a multi-digit number and reports that number over a protocol-specific wire interface, rather than emitting undifferentiated pulses. Because it reports an actual reading, a device that misses a read can ask again and get the correct current total, unlike a pulse counter, which has no way to recover a missed count. Examples: Neptune ARB/ProRead/ProCoder/E-CODER, Sensus UI-1203/1204, Badger ADE/HR-E. See also UI-1203, ARB, Encoded vs. pulse
Endpoint: The radio transmitter module attached to (or built into) a meter that sends its reading out to an AMR or AMI collection system. See also AMI, AMR, encoder register
Environmental Compliance Approval (ECA): Legal instrument issued under Ontario's Environmental Protection Act and Ontario Water Resources Act, setting facility-specific monitoring and discharge conditions (including, commonly, hydraulic flow limits) for wastewater dischargers. Metered effluent flow is a common ECA condition but is set per-facility, not a single universal statutory rule.
FDA-compliant wetted materials: Materials in a meter's wetted flow path (commonly 316/316L stainless steel, PFA, or PEEK) that meet US FDA requirements for food-contact surfaces, typically specified alongside 3-A and/or EHEDG certification for food and beverage process meters. See also 3-A Sanitary Standards, EHEDG
Flow conditioner: A fitting installed upstream of a meter to straighten and even out the flow profile, used when the available straight-run length is shorter than the meter's ideal requirement. See also straight run
HART: A digital communication protocol superimposed on top of a 4-20mA current loop, carrying secondary data (diagnostics, a secondary variable, device identification) without disturbing the primary analog rate signal. Available as a plug-in module on some process transmitters (e.g. GF Signet's Type 9900). See also 4-20mA, Modbus (RTU/TCP)
Insertion / paddlewheel meter: A meter whose sensing element, a small paddlewheel or similar rotor, is inserted through the pipe wall into the flow stream rather than having the whole flow pass through a dedicated meter body. It is cheaper to install on existing large pipe than a full-bore meter. See also clamp-on, straight run
intrinsically safe: A design/output rating (often marked Ex ia) limiting electrical energy in a circuit so it cannot ignite a flammable atmosphere even under fault conditions. Relevant to a meter's pulse, 4-20 mA or Modbus output when that signal must cross into a hazardous-area classified zone. See also Class I Division 2, ATEX
IP67: Ingress Protection rating for temporary, shallow water exposure: protection against immersion up to 1 metre deep for up to 30 minutes. Adequate for weather-exposed, above-grade installations that are not prone to standing water. See also IP68
IP68: Ingress Protection rating for continuous or deeper submersion (manufacturer-specified depth and duration beyond IP67's baseline). The rating to specify for a register or transmitter installed in a below-grade pit or vault where standing water is possible. See also IP67
ISO 4064: International standard for cold- and hot-potable-water meters covering metrological and technical requirements (Part 1) and test methods (Part 2). ISO 4064-1:2014 is identical to OIML R49-1:2013; ISO 4064-2:2014 is identical to OIML R49-2:2013. Defines the Q1–Q4 flow points and the Class 1 / Class 2 accuracy system. See also OIML R49, accuracy class
K-factor: The number of pulses a meter outputs per unit of volume (the inverse of pulse weight), used mainly with turbine and some insertion-style flow meters to convert a raw pulse count into a flow rate or total volume. See also pulse weight, pulse output
Lead-free: In North American plumbing code, a wetted-surface material standard (following the 2014 US federal Reduction of Lead in Drinking Water Act and equivalent Canadian provincial adoption) limiting the weighted-average lead content of components that contact potable water; meters sold for drinking-water service are generally required to meet it. See also NSF 61, NSF 372, potable
lead-free (weighted average): The 0.25% maximum weighted-average lead content on wetted surfaces required by NSF/ANSI/CAN 372, consistent with the US Safe Drinking Water Act. Standard bronze/brass alloys often exceed this limit; reformulated "low-lead" or "NL/LF" brass, stainless steel, and composite/polymer bodies are typically compliant, but only a 372 listing confirms it. See also NSF/ANSI/CAN 372
Loop-powered: A device (commonly a 4–20 mA transmitter) that draws the electrical power it needs to operate from the same two-wire current loop it uses to send its signal, avoiding a separate power wiring run. See also 4-20 mA (current loop)
Loop-powered (2-wire transmitter): A 4-20mA transmitter that draws its own operating power from the same two wires that carry the current-loop signal, rather than having separate power terminals. An external loop supply must never be added on top of an already-active loop-powered device, or damage can result. See also 4-wire transmitter, 4-20mA
Low-flow cutoff: The flow rate below which a meter stops registering consumption at all, rather than just under-reading. It matters for catching slow leaks and very low continuous draws. See also Q1, empty-pipe detection
M-Bus: A European standard for the remote reading of water, gas or electricity meters over a low-cost two-wire wired bus, with a Wireless M-Bus variant; forms the basis of the Open Metering System used to combine multiple utility types on one network. Common on European heat/water meters. See also Modbus (RTU/TCP)
Maximum pulse rate: The highest pulse frequency (in Hz) a reading device can reliably count, set by its minimum pulse width and debounce design. Choosing too fine a pulse weight on a fast meter can in principle exceed this ceiling. For standard AWWA drinking-water meters read by an industrial LoRaWAN pulse counter (2000 Hz class), though, the ceiling is rarely the binding constraint. Register resolution and leak-detection needs usually matter more. See also Pulse weight, Minimum pulse width
Measurement Canada: Federal body, part of ISED, administering the Weights and Measures Act. Water meters are explicitly exempt from Measurement Canada's approval and initial-inspection requirements, unlike gas pumps, scales and other trade devices. Provincial and municipal authorities set water billing practices and fees, not Measurement Canada. See also Weights and Measures Act
Minimum pulse width: The shortest contact-closure duration a reading device is specified to reliably detect, which together with debounce timing sets the device's maximum pulse (input) frequency. Example: the Milesight EM300-DI LoRaWAN pulse counter specifies a 250-microsecond minimum pulse width and accepts up to 2000 Hz. See also Maximum pulse rate, Contact bounce / debounce
Modbus: An open, widely-supported digital communication protocol that lets a meter or instrument report multiple values (flow rate, total, alarms, diagnostics) over a single wired connection to a PLC or SCADA system, instead of one wire per signal. See also 4-20 mA (current loop), encoder register
Modbus (RTU/TCP): An industrial communication protocol where a master device (RTU or PLC) reads a slave instrument's registers over RS-485 (Modbus RTU) or Ethernet (Modbus TCP). Those registers are typically a running totalizer and flow rate, and sometimes temperature or alarm bits. It is more common on process instruments, such as GF Signet's Type 9900 transmitter with a plug-in Modbus module, than on standard AWWA utility cold-water meters, whose registers typically use their own encoder protocols instead. See also HART, Encoded vs. pulse
Multi-jet meter: A velocity-type meter that directs water through several jets around a rotor rather than one, which balances the forces on the rotor and generally improves accuracy and durability over a single-jet design of the same size. See also single-jet meter, woltmann meter
NSF/ANSI/CAN 372: Standard verifying that a drinking-water component's wetted surfaces meet a maximum weighted-average lead content of 0.25% (0.2% for solder and flux). Products certified to NSF/ANSI/CAN 61 must generally also be evaluated to 372 unless specifically exempted by the US Safe Drinking Water Act. A meter can be NSF 61-listed without being separately verified to 372, so check both. See also NSF/ANSI/CAN 61, lead-free (weighted average)
NSF/ANSI/CAN 61: Joint US and Canada standard evaluating the health effects of materials and products that contact drinking water. It certifies that a wetted component, such as a meter body, seal or register housing, does not leach contaminants above allowable thresholds. It says nothing about measurement accuracy. See also NSF/ANSI/CAN 372, lead-free (weighted average)
Nutating disc meter: A positive-displacement meter that measures volume by counting the wobbling (nutating) motion of a disc as water fills and empties a fixed measuring chamber. It is the most common residential mechanical meter design. See also positive-displacement, single-jet, multi-jet
OIML R49: International Organization of Legal Metrology recommendation for water meters, textually identical to ISO 4064. Defines flow-rate points Q1 (minimum), Q2 (transitional), Q3 (permanent/nominal) and Q4 (overload), and the maximum permissible error (MPE) for accuracy Class 1 and Class 2 meters. See also ISO 4064, accuracy class, Q1/Q2/Q3/Q4
Open collector: A common solid-state pulse/frequency output design where a transistor 'sinks' current to a common/ground rail when active, and is otherwise off (floating), rather than switching a voltage directly. The receiving device supplies its own pull-up voltage. GF Signet's Type 2536 paddlewheel sensor is an example: an open-collector output sinking up to 10 mA, producing a frequency proportional to velocity (49 Hz per m/s nominal) rather than a scaled volume pulse. See also Solid-state output, Dry contact
Positive-displacement meter: A meter that measures volume directly, by repeatedly filling and emptying a chamber of known size and counting the cycles. Nutating-disc meters are the most common example. See also nutating disc meter
Potable: Safe to drink. On a meter spec sheet, "potable" service usually implies the wetted materials meet drinking-water certifications (NSF 61/372) and lead-free requirements, as opposed to a meter built only for non-potable process or irrigation water. See also NSF/ANSI/CAN 61, lead-free
Pressure loss (head loss): The drop in water pressure caused by water passing through the meter itself, which the meter's own resistance to flow creates; larger, less-restrictive meter designs generally cause less pressure loss at a given flow rate. See also straight run
ProRead: Neptune's ARB VI absolute encoder register: 6-digit resolution, field-programmed with a dedicated Neptune ProRead Portable Programmer. Its coarser resolution is why third-party converters like the ScadaMetrics Signalizer can only extract a pulse output from a ProRead register, not a stable 4-20mA signal (which needs the finer 8-9 digit MACH 10/ProCoder/E-CODER protocols). See also ARB, Encoder register (absolute encoder)
Pulse divider / scaler: The setting (a DIP switch, a register-programming choice, or a selected totalizer digit) that determines pulse weight by choosing which decade of the meter's total volume drives one pulse. Sensus's OMNI+ register does this by letting the installer pick which digit of the totalizer feeds the pulse output; ScadaMetrics' Signalizer does it with DIP-switch scalars (x1, x10, x100... x0.1, x0.01...) applied to the encoder's native resolution. See also Pulse weight, Encoder register
Pulse output: A signal from a meter (a switch closure or voltage transition) generated every time a fixed volume of water passes, letting an external counter, PLC, or data logger track consumption without reading the register visually. See also pulse weight, reed switch, solid-state switch
Pulse weight: The volume one pulse represents, set at the register (or on an accessory such as a Signalizer or scaled register), e.g. 1 litre, 10 US gallons, 0.001 cubic metre. Fine weights give better resolution but produce more pulses per litre; coarse weights are easier on radio/battery budgets but blur short-duration events like a small leak. See also Pulse output, Pulse divider / scaler
Q1 (minimum flow rate): Under ISO 4064 / OIML R49, the lowest flow rate at which a meter is required to stay within its stated (larger) error limits. See also Q2, Q3, Q4, R-ratio
Q1/Q2/Q3/Q4: The four defining flow-rate points under ISO 4064 and OIML R49: Q1 (minimum flow rate), Q2 (transitional flow rate), Q3 (permanent or nominal flow rate, given in m³/h and used to designate the meter), and Q4 (overload flow rate). Q2/Q1 is fixed at 1.6, and Q4/Q3 is fixed at 1.25. See also ISO 4064, OIML R49, accuracy class (ISO 4064 / OIML R49)
Q2 (transitional flow rate): Under ISO 4064 / OIML R49, the flow rate that marks the switch-over point between the wider lower-flow error band and the tighter upper-flow error band. See also Q1, Q3, Q4
Q3 (permanent flow rate): Under ISO 4064 / OIML R49, the highest flow rate a meter is designed to run at continuously, under normal conditions, without degrading accuracy or service life. It is the main size/capacity number used to compare meters under the modern standard. See also Q1, Q4, R-ratio
Q4 (overload flow rate): Under ISO 4064 / OIML R49, the highest flow rate a meter can handle for short periods without being damaged or permanently losing accuracy, even though it is not meant to run there continuously. See also Q3, Q1
Qmin / Qmax: Older, plainer terms (still used loosely, especially by North American manufacturers alongside or instead of the ISO Q1–Q4 system) for the lowest and highest flow a meter is rated to measure. See also Q1, Q4, turndown
R-ratio (R value): The ratio Q3/Q1 under the modern ISO 4064 and OIML R49 system, a single number that summarizes a meter's turndown. A higher R means the meter reads accurately over a wider span between its lowest and highest rated flows. See also turndown, Q1, Q3
R900i (integrated register): Neptune's fused register-and-radio design, where the R900 radio board is built onto the same circuit board as the encoder inside one sealed housing. Neptune states this is deliberate, to cut installation cost and reduce tamper points. It means there is no exposed 3-wire encoder pigtail for a third-party device such as a Signalizer to tap. A standalone (non-'i') R900 does have exposed wiring and can be read alongside a Signalizer wired to the register. See also Encoder register (absolute encoder), ARB
Reed switch: A magnetically actuated dry contact: two ferromagnetic reeds sealed in glass, closed by a magnet fixed to the meter's rotating measuring element as it turns. It needs no power at the meter end. Rated in the hundreds of millions to billions of cycles for metering duty. Because it is magnetically actuated, an external magnet held against the meter can force spurious closures, which is a known tamper vector. See also Solid-state output, Dry contact, Contact bounce
Register: The display and counting mechanism on a water meter, whether a mechanical odometer with a sweep hand, an electronic LCD or an absolute encoder. It shows the accumulated volume and, on many models, the current flow rate. See also totalizer, encoder register, sweep hand
Rollover: What happens when a meter's totalizer reaches the maximum value it can display and resets to zero to keep counting. The reading has not gone backward; it has wrapped around. See also totalizer, register
Single-jet meter: A velocity-type meter in which a single stream of water strikes a rotor at one point, turning it at a speed proportional to flow rate; simple and low-cost, generally used on smaller residential/commercial lines. See also multi-jet meter, woltmann meter
Solid-state output: A pulse or frequency output produced electronically (open-collector transistor, Hall-effect sensor, or optical sensor) instead of a mechanical switch. Needs a small supply voltage but has no moving parts to wear or bounce, and tolerates higher pulse rates than a reed switch. See also Reed switch, Open collector
Solid-state switch: An electronic (no moving contacts) pulse output, typically able to run at higher pulse rates and with a longer service life than a mechanical reed switch. See also reed switch, pulse output
Straight run: The length of unobstructed, uniform-diameter pipe required immediately upstream (and sometimes downstream) of a meter so the flow profile is settled enough for the meter to read accurately, usually expressed as a multiple of pipe diameters (e.g., 10D). See also flow conditioner, clamp-on
Strainer: A fitting installed upstream of a meter (especially turbine and Woltmann types) to catch debris that could damage the meter's moving parts or skew its reading. See also straight run
Submeter: A secondary meter installed downstream of the main utility meter to measure consumption for a specific tenant, process, or area, so usage can be tracked or billed separately without touching the utility's own billing meter. See also endpoint
Sweep hand: The rotating pointer on a mechanical meter's circular test dial that shows sub-unit consumption (fractions of a gallon or litre) between the whole-number digits on the odometer wheels. See also register, low-flow indicator
T30 / T50 / T90 (temperature class): EN 14154 and ISO 4064 temperature classifications for a water meter's rated operating temperature range: T30 (cold, 0.1–30°C), T50 (cold, up to 50°C), T90 (hot, up to 90°C, commonly from 30 or 50°C up to 90°C), and higher classes such as T130 for higher-temperature service. A meter has to be rated to the class matching its actual water temperature. A standard cold-water meter is not safe on a hot line. See also EN 14154
Totalizer: The part of a meter (mechanical or electronic) that accumulates and displays the running total volume that has passed through it, as opposed to the instantaneous flow rate. See also register, rollover
Transit-time (ultrasonic) meter: An ultrasonic flow meter that measures the difference in travel time between an ultrasonic pulse sent with the flow and one sent against it; the time difference is proportional to flow velocity. See also clamp-on, mag meter
TSSA: The Technical Standards and Safety Authority, which administers Ontario's Pressure Equipment Act and the province's Boilers and Pressure Vessels regulation (O.Reg 220/01), including CRN design registration. See also CRN (Canadian Registration Number)
Turndown (as it applies to signal reading): The ratio between a meter's maximum and minimum accurately measurable flow. It matters for signal choice because a wide turndown means the meter reports, or pulses, across a very large dynamic range. A 4-20 mA span or pulse weight chosen for the top of the range may under-resolve the bottom, which is exactly where overnight leaks live. See also Pulse weight, 4-20mA
Turndown (turndown ratio): The ratio between a meter's maximum and minimum flow rates within its accurate operating range. A higher turndown means the meter stays accurate over a wider spread of flows, which matters when demand varies a lot (e.g., a building with both a dripping tap and a fire pump). See also accuracy, Q1, Q3, R-ratio
UI-1203: Sensus's synchronous, clock-driven, three-wire encoder protocol (also called 'the Sensus protocol'), adopted industry-wide: red wire = power + clock, black = common ground, green = bidirectional data, data transmitted in ASCII, roughly 5V with clock frequencies in the low hundreds of Hz. Full register-level command documentation requires an NDA with Sensus/Xylem. See also Encoder register (absolute encoder), ARB
unit sub-metering (Ontario): Licensed activity under s.57(c.1) of the Ontario Energy Board Act, 1998, governed by the OEB's Unit Sub-Metering Code. It applies to electricity only: the OEB explicitly does not regulate sub-metering of water or natural gas. Water sub-metering in Ontario is governed instead by each municipality's water by-law and by the lease or contract between the parties. See also Measurement Canada
Vortex meter: A flow meter that counts the frequency of vortices shed behind a bluff body placed in the flow stream. The shedding frequency is proportional to flow velocity. See also transit-time, mag meter
Weights and Measures Act: The federal Canadian statute Measurement Canada administers to ensure devices used in trade measure accurately. Its regulations specifically exempt water meters from the approval/inspection regime applied to other trade devices. See also Measurement Canada
Woltmann meter: A turbine-type meter with the rotor axis parallel to the flow (an axial turbine), used on larger pipe sizes where jet-type meters are impractical. It is common on utility mains and large commercial and industrial services. See also turbine, multi-jet meter

Questions · 36 answers

Do I need Measurement Canada approval to bill a tenant for water?

No. Water meters are exempt from Measurement Canada's approval and initial-inspection requirements under the Weights and Measures Regulations, unlike gas pumps, scales and other trade devices. Measurement Canada's own role is verifying that devices used in trade measure accurately; provincial and municipal authorities set water billing practices and fees, not Measurement Canada.

Source: https://ised-isde.canada.ca/site/measurement-canada/en/consultations/water-meter-consultation-introduction

Is water sub-metering regulated the same way as electricity sub-metering in Ontario?

No. The Ontario Energy Board's Unit Sub-Metering Code and its licensing requirement under s.57(c.1) of the Ontario Energy Board Act, 1998 apply to electricity only. The OEB explicitly does not regulate sub-metering of water or natural gas. Water sub-metering is instead governed by the local municipal water by-law and by the lease/contract between the parties.

Source: https://www.oeb.ca/applications/how-file-application/apply-licence/unit-sub-metering

Can I put a process meter on a potable water line?

Only if its wetted parts carry NSF/ANSI/CAN 61 certification (and, where lead content matters, NSF/ANSI/CAN 372). A meter designed for wastewater, reclaimed water or irrigation duty is generally not certified for drinking-water contact even if it's mechanically and dimensionally compatible with the pipe.

Source: https://www.nsf.org/ca/en/water-systems/nsf-ansi-can-61-testing-and-certification · https://www.nsf.org/knowledge-library/nsf-ansi-can-372-technical-requirements

Is a brass or bronze meter automatically lead-free?

No. Standard bronze and brass alloys often exceed NSF/ANSI/CAN 372's 0.25% weighted-average lead limit. Look for a meter specifically listed as NSF/ANSI/CAN 372 certified, or built from reformulated lead-free brass, stainless steel, or composite and polymer materials. Material alone is not proof of certification.

Source: https://www.nsf.org/knowledge-library/nsf-ansi-can-372-technical-requirements

What's the difference between NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372?

NSF/ANSI/CAN 61 certifies that a drinking-water component does not leach harmful contaminants generally. NSF/ANSI/CAN 372 is a narrower, separate certification verifying lead content against a 0.25% weighted-average limit on wetted surfaces. A product can be NSF 61-listed without also being separately verified to 372, so check both listings if lead content matters for the application.

Source: https://www.nsf.org/knowledge-library/nsf-ansi-can-372-technical-requirements · https://www.nsf.org/ca/en/water-systems/nsf-ansi-can-61-testing-and-certification

Do I need a CRN for a flow meter installed in Ontario?

Usually not, for a standard water-service meter. Ontario Regulation 220/01 exempts fittings and piping carrying water at 65°C or less and 250 psi or less (or buried water piping at 65°C or less and 740 psi or less) from TSSA's Boilers and Pressure Vessels registration, which covers most utility and building water services. A meter on a hotter process line, a higher-pressure line, or a line carrying something other than water should be checked with TSSA directly rather than assumed exempt.

Source: https://www.ontario.ca/laws/regulation/010220 · https://www.tssa.org/about-canadian-registration-number-crn

What AWWA standard applies to my meter?

It depends on the technology: C700 (positive-displacement, metal case), C710 (plastic case), C701 (turbine), C702 (compound), C704 (propeller), C708 (multi-jet), C712 (single-jet), C713 (fluidic-oscillator), C715 (electromagnetic and ultrasonic revenue meters), C707 (encoder remote-registration systems), and C750 and C751 for transit-time and magnetic-inductive process flowmeters. There is no blanket "AWWA-approved" mark. Each meter type has its own standard.

Source: https://www.awwa.org/standards/standards-list/

Can a standard cold-water meter be used on a hot water line?

Not reliably. Standard cold-water meters are typically rated to about 30-50°C. Hot-water service needs a meter built and marked to a higher EN 14154 or ISO 4064 temperature class, such as T90, rated to 90°C. The seals, lubricants and register materials in a cold-water-rated meter are not necessarily built for continuous higher-temperature exposure.

Source: https://bmetersuk.com/wp-content/uploads/2020/05/BMETERS-GSD8-RFM.pdf

What does an IP68 rating mean and when do I need it on a water meter?

IP68 means the register or transmitter is rated for continuous or deeper submersion, as opposed to IP67's brief, shallow-submersion rating (up to 1 metre for up to 30 minutes). Specify IP68 for any meter or register installed in a below-grade pit or vault where standing water is a real possibility; IP67 is generally adequate for above-grade, weather-exposed locations.

Does my meter need a hazardous-area electrical rating?

Only if it is powered and installed where flammable vapours, gases or dust could be present, for example near a fuel or solvent line. In that case, look for Class I Division 2 (North America) or ATEX (Europe) marking, and, if you are wiring the output into a control system, an intrinsically safe output option. Most utility-grade water metering has no need for this rating at all.

Source: https://www.us.endress.com/en/field-instruments-overview/flow-measurement-product-overview/electromagnetic-flowmeter-promag-h200-5h2b

Do I need 3-A or EHEDG certification for a food or beverage flow meter?

If the meter's wetted parts touch a food, dairy or beverage product, yes. 3-A Sanitary Standards, EHEDG and FDA-compliant wetted materials are the relevant certification track. That is a separate track from NSF/ANSI/CAN 61, which is a drinking-water standard focused on chemical leaching rather than on cleanability (CIP and SIP compatibility, crevice-free design) the way 3-A and EHEDG are.

Source: https://www.anderson-negele.com/flow-sensors

Does a wastewater, reclaimed water or irrigation meter need any drinking-water certification?

No. Non-potable lines do not require NSF/ANSI/CAN 61 or 372. What matters instead is solids and debris tolerance and turndown, which is why electromagnetic (mag) and ultrasonic meters, with no wetted moving parts, are the common choice for effluent, reclaimed water and irrigation service.

Source: https://www.mccrometer.com/electromagnetic-flow-meters-family-page

What size meter do I need for a 2-inch line?

Pipe size alone does not size a meter. You need the actual minimum, typical and maximum flow the line will see, then match those to a meter's Q1–Q4 bands (or AWWA low, normal and max), which is why a 2-inch line can carry meters of several different capacities. AWWA Manual M6 is the standard reference for working through the selection. Check each candidate meter's own datasheet rather than assuming pipe size determines meter size.

Source: https://webstore.ansi.org/standards/awwa/awwam62012 · https://www.oiml.org/en/files/pdf_r/r049-1-e24.pdf

Why does my meter read in cubic feet (or US gallons) instead of cubic metres or litres?

Most utility-grade meters sold in North America (Neptune, Sensus, Badger, Mueller and others) are made primarily for the US market and ship in their US stock configuration, meaning US gallons or cubic feet, unless the buyer orders or programs a metric register. Canadian water meters are not currently regulated as trade devices by Measurement Canada, so no federal requirement forces a metric register, even though most Canadian municipalities bill in cubic metres.

Source: https://ised-isde.canada.ca/site/measurement-canada/en/consultations/water-meter-consultation-introduction · https://laws-lois.justice.gc.ca/eng/acts/w-6/fulltext.html

What's the difference between a US gallon and a Canadian (Imperial) gallon?

They are different sizes. 1 US gallon is exactly 3.785411784 litres, while 1 Canadian (Imperial) gallon, defined in Canada's own Weights and Measures Act, is exactly 4.54609 litres, about 20% larger. A meter spec sheet or register that just says "gallons" without specifying US or Imperial should be treated as ambiguous until confirmed.

Source: https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors · https://laws-lois.justice.gc.ca/eng/acts/w-6/fulltext.html

Are water meters regulated as trade devices in Canada?

Not currently. Measurement Canada states that water meters are exempt from the approval and initial-inspection requirements that apply to devices like gas pumps and scales. Measurement Canada ran a public consultation in 2021 on whether to change this, citing AWWA M6, ISO 4064 / OIML R49, and NIST Handbook 44 as the relevant existing standards, but as of this page's research date no new approval requirement is in force.

Source: https://ised-isde.canada.ca/site/measurement-canada/en/consultations/water-meter-consultation-introduction

How long do meter batteries last?

It varies by manufacturer and model, and depends on the reporting/reading interval and ambient temperature. As one data point, Kamstrup lists its MULTICAL 21 water meter's internal lithium battery at up to 16 years and its flowIQ 2200 at up to 20 years "depending on use and setup." Always confirm the rated battery life for the specific model and configuration you're buying rather than assuming a figure.

Source: https://www.kamstrup.com/en-en/product-centre/flowiq-2200 · https://stockshed.uk/files/kamstrup/MULTICAL21%20-%20Technical%20Description%20-%20English.pdf

What's the difference between a pulse output and a 4–20 mA output?

A pulse output sends a discrete signal, a switch closure or voltage transition, every time a fixed volume passes, which suits cumulative consumption. A 4–20 mA output is a continuously varying analog current that represents the instantaneous flow rate at any moment across its calibrated range. Our preferred setup reads consumption from pulse, either directly or from an encoder register through a converter such as the ScadaMetrics Signalizer, and flow rate from 4–20 mA.

Source: https://scadametrics.com/shop/product/signalizer/

Can an encoder-register meter be read by a standard pulse counter?

Not directly. An encoder register (Neptune ARB/E-Coder, Sensus UI-1203, Badger ADE) stores its reading digitally rather than generating pulses on its own. It needs a converter wired to the register, such as the ScadaMetrics Signalizer, to translate the encoder reading into a pulse train, and optionally a 4–20 mA signal, that a standard counter or PLC can use.

Source: https://scadametrics.com/shop/product/signalizer/ · https://dam.neptunetg.com/m/27f7301a97f3110e/original/PSD-CI-MACH-10-AND-SCADAMETRICS-04-22.pdf

Is a Neptune R900i compatible with Quantify's pulse/4–20 mA/encoder signal chain?

Not straightforwardly. The R900i is an integrated encoder and radio meter with no separately exposed register output. The encoder reading is consumed internally by the built-in AMI radio, so there is no accessible pulse or 4–20 mA signal to tap without that radio module. Confirm the exact model and configuration before assuming compatibility.

What does NSF/ANSI 61 certification mean, and do I need it?

NSF/ANSI/CAN 61 sets minimum health-effects requirements for chemicals and impurities a product might indirectly impart to drinking water. It is the standard certification for any meter, valve or fitting that will be in contact with potable water. NSF/ANSI/CAN 372 covers lead content separately. If the meter is going on a drinking-water line, check the manufacturer's own listing or search NSF's database rather than assuming certification from a general product description.

Source: https://info.nsf.org/Certified/PwsComponents/Listings.asp?TradeName=meters

What's the difference between AMR and AMI?

AMR (Automated Meter Reading) typically means a drive-by or walk-by radio read. It is automated, but someone still has to pass near the meter. AMI (Advanced Metering Infrastructure) uses a fixed network to collect readings continuously, often hourly or more often, without anyone visiting the site.

Why does straight-run pipe length matter for meter accuracy?

Most flow-measurement principles assume a settled, symmetrical velocity profile in the pipe, and a bend, valve or pump immediately upstream disturbs that profile and can bias the reading. Manufacturers specify a minimum straight-run length upstream, and sometimes downstream, usually expressed as a number of pipe diameters ("D"). A flow conditioner can shorten the length needed when space is tight. Check the specific meter's installation manual for its required straight-run distance.

Source: https://webstore.ansi.org/standards/awwa/awwam62012

Can I buy a water meter from the same places I buy plumbing supplies (Amazon, Grainger)?

It depends on the brand. DAE's pulse-output meters are sold directly on Amazon.ca and from the manufacturer's own online store. Grainger.ca stocks small generic mechanical meters (e.g., GPI-branded), but none of the twelve utility/process brands in this catalogue were found for sale there. The larger utility brands (Neptune, Sensus, Badger, Kamstrup, Mueller) generally sell through their own Canadian entity or a small number of named waterworks distributors, not general industrial marketplaces.

Source: https://www.amazon.ca/DAE-AS-100mP-Output-Measuring-Coupling/dp/B08W263WL8 · https://www.grainger.ca/en/product/O1N-WATER-METER-1-IN-NPT-3-30-GALLONS/p/GRP113255-5

Can a mechanical meter be installed in any orientation (vertical, horizontal, upside down)?

It depends on the model. Some mechanical meter designs are only accurate horizontal, some tolerate any orientation, and each manufacturer's installation manual either states this or does not. AWWA Manual M6 covers general meter-installation practice. This catalogue records each model's confirmed orientation rating individually rather than assuming one answer covers every meter.

Source: https://webstore.ansi.org/standards/awwa/awwam62012

My meter has an R900 on it. Can you read it?

It depends which R900 you have. A standalone R900 endpoint is wired to the register by exposed terminals, so we can wire a ScadaMetrics Signalizer to the same register in parallel and get a pulse for consumption and a 4-20 mA signal for rate without touching the R900 itself. An R900i, the integrated version, has the radio built onto the same board as the encoder inside one sealed housing, with no exposed wiring to tap; look for a register model name ending in ')R900i'. Neptune's own documentation says the integration is deliberate, to cut install cost and reduce tampering. If you have an R900i, we cannot read it with our pulse, 4-20 mA and Modbus stack. The options are reading it through a Neptune-licensed AMR/AMI system, or replacing the register with a non-integrated one where the meter body supports it.

Source: https://dam.neptunetg.com/m/39aa6f1f5555c394/original/FAQ-E-CODER-R900i-18-002035-04-18.pdf · https://scadametrics.com/PDF/EMP_vNEPT.pdf · https://dam.neptunetg.com/m/4318ac90cc990ab4/original/FAQ-R900-ENDPOINT-06-23.pdf

What pulse weight should I order?

For a 5/8"-1" residential-size meter, 1 litre is a good default. It is fine enough to see a small overnight leak within about 30 seconds of it starting, and nowhere near any counter's frequency ceiling even at the meter's maximum rated flow. For 1.5" and larger meters, 10 litres is usually the better choice: at that size a couple of litres a minute is already close to the meter's own minimum measurable flow, so a finer pulse buys little real leak sensitivity while generating more radio traffic and battery drain for no benefit. This is our own guidance for balancing resolution against pulse volume rather than a manufacturer or AWWA specification, so always check which decade values your specific register lets you select.

Source: https://dam.neptunetg.com/m/eb2f512a54b38ba/original/PS-MACH-10-CI-23-010472-08-23.pdf · https://cms2.revize.com/revize/kentcountymd/Documents/Government/Departments/Public%20Works/Water%20and%20Wastewater/How%20to%20Connect%20to%20Water%20or%20Sewer/Mach_10_Meter_Spec.pdf · https://resource.milesight.com/milesight/iot/document/em300-di-datasheet-en.pdf

Can I get both flow rate and total consumption from one meter?

Yes, several ways. Some registers (the Sensus OMNI+, except the R2 variant) offer a native pulse output alongside their encoder output. A ScadaMetrics Signalizer wired to any compatible encoder register produces a 4-20 mA rate signal and a volume pulse from the same box at the same time. And some process transmitters expose both a rate value and a totalizer over Modbus. What you cannot do is get a running total directly off a bare 4-20 mA loop. That signal only ever represents instantaneous rate, so any total shown on a dashboard fed purely by 4-20 mA has been integrated from that rate downstream rather than read off the meter.

Source: https://cdn2.webdamdb.com/md_sVlqsH0hPD958YJC.jpg.pdf?v=1 · https://scadametrics.com/PDF/EMP_vNEPT.pdf

What's the difference between a pulse output and an encoder register?

A pulse output tells a reading device 'one more unit of volume just passed'. It is a bare count, and if the reading device misses a pulse, that volume is gone for good. An encoder register instead reports an actual number, the current total, over a protocol-specific wired connection, so a missed read just means asking again. Because of this, you cannot wire an encoder register straight into a generic pulse counter. The reading device has to speak that register's specific protocol (Neptune's ARB/E-CoderPLUS, Sensus's UI-1203, Badger's ADE/HR-E protocol) to get a number out of it.

Source: https://industrialmonitordirect.com/blogs/knowledgebase/sensus-water-meter-ui-1203-three-wire-protocol-interface-guide · https://metervalveandcontrol.com/pdf/water-meters/01-PD/01e-13-NTG-435-PS-E-CODER-02.13.pdf

Can a reed-switch pulse output be tampered with?

In principle, yes. A reed switch is closed by a magnet, so an external magnet held against the meter can force spurious closures without opening the meter at all. Reed switches themselves are very durable mechanically, with manufacturers commonly rating hermetically sealed types past a billion cycles, so wear is not the concern; magnetic spoofing is. This is a real reason utility-grade registers increasingly add independent tamper, reverse-flow and leak detection flags rather than relying solely on a bare pulse count.

Source: https://assuredautomation.com/reed-switch-pulse-output/index.php · https://www.rmc.com.au/wp-content/uploads/2021/09/RMC_ReedSwitchGuide_0921_V2.pdf · https://dam.neptunetg.com/m/2c01babf7bbfc6e1/original/FAQ-MACH-10-2024-12-23.pdf

What's the ScadaMetrics Signalizer, and is it one product or several?

It is one physical product, the Model EMP: a DIN-rail box that reads an encoder register's 3-wire signal and generates a 4-20 mA rate output, a dry-contact volume pulse and a dry-contact alarm, while passing the original encoder signal through to your utility's AMI or AMR endpoint unaffected. ScadaMetrics publishes separate instruction sheets for Neptune, Sensus and other brands because the DIP-switch settings differ by protocol, but the hardware underneath is the same unit, and it also natively decodes Elster-protocol registers.

Source: https://scadametrics.com/shop/product/signalizer/ · https://scadametrics.com/blog/?p=1968 · https://scadametrics.com/PDF/EMP_vNEPT.pdf

Will the Signalizer work with my ProRead register?

Partially. The Signalizer will decode a ProRead register and give you a pulse output, but not a 4-20 mA output. ProRead's 6-digit resolution is coarser than the 8 and 9 digit MACH 10, ProCoder and E-CODER protocols the Signalizer needs for a stable analog signal. If you need flow rate as well as consumption from that meter, you would need to upgrade the register (Neptune's literature notes that ProRead registers can be field-upgraded to ProCoder or E-CODER) or use a different rate-reporting method.

Source: https://scadametrics.com/PDF/EMP_vNEPT.pdf

Does Modbus work on standard water utility meters like Neptune or Sensus?

Not typically. Neptune and Sensus utility registers use their own proprietary encoder protocols (ARB/E-CoderPLUS, UI-1203) rather than Modbus, and none of the current Neptune product literature we reviewed lists Modbus as a meter output. Modbus and HART show up much more often on process instruments. GF Signet's Type 9900 transmitter, for example, takes a plug-in Modbus RS-485 module and a separate plug-in HART module as accessories.

Source: https://www.gfps.com/content/dam/gfps/com/datasheets/en/gfps-datasheet-9900-transmitter-en.pdf · https://dam.neptunetg.com/m/2c01babf7bbfc6e1/original/FAQ-MACH-10-2024-12-23.pdf · https://www.neptunetg.com/globalassets/products/literature/faq-ci-mach-10-ultrasonic-06.21.pdf

Why does my pulse counter's maximum Hz rating matter if it never gets close to being hit?

For a standard AWWA-sized drinking-water meter, in practice it usually does not. Working the numbers for a Milesight EM300-DI class LoRaWAN pulse counter, rated to 2000 Hz, against Neptune's own published maximum flow rates from 5/8" up to 8", even a fine 1-litre pulse weight only reaches about 1.6 pulses per second at 5/8", and roughly 25 pulses per second at 8" with a 10-litre weight. That is a small fraction of the counter's ceiling. The Hz rating matters more as a sanity check, so you know you have plenty of headroom, and for raw unscaled frequency outputs from process sensors such as paddlewheel meters, which run continuously rather than in scaled volume pulses.

Source: https://resource.milesight.com/milesight/iot/document/em300-di-datasheet-en.pdf · https://dam.neptunetg.com/m/eb2f512a54b38ba/original/PS-MACH-10-CI-23-010472-08-23.pdf · https://www.gfps.com/content/dam/gfps/com/datasheets/en/gfps-datasheet-2536-rotor-x-paddlewheel-flow-sensor-en.pdf

Is a 4-20mA signal 2-wire or 4-wire, and does it matter?

Both exist. A loop-powered (2-wire) transmitter draws its own operating power from the same two wires carrying the signal. That is convenient, but you must never add an extra loop power supply on top of an already-active loop-powered device, or you can damage it; the Signalizer's own documentation warns of exactly this. A 4-wire transmitter has separate power terminals, which frees the loop from also powering the electronics. Check your specific transmitter's documentation before wiring power.

Source: https://scadametrics.com/PDF/EMP_vNEPT.pdf · https://control.com/textbook/analog-electronic-instrumentation/2-wire-loop-powered-transmitter-current-loops/

Does Badger have its own pulse-output register, or do I need a Signalizer?

Badger sells its own dedicated pulse register, the HR-LCD Pulse Scaled Register: a solid-state register with no moving parts that fits directly on Recordall Disc, Turbo and Compound series meters and produces a scaled pulse output natively. No separate converter is needed. Sensus offers the same thing on its OMNI+ register, except on the R2 variant, which does not support pulse output. A Signalizer-style converter is for when the register only exposes an encoder signal and has no native pulse option.

Source: https://www.badgermeter.com/products/encoders/hr-lcd-pulse/ · https://cdn2.webdamdb.com/md_sVlqsH0hPD958YJC.jpg.pdf?v=1

Sources · 45 documents

Standards

Document	Publisher	Use it for
AWWA Standards List	American Water Works Association	The full current catalogue of C700-series meter standards, so you can match a meter's stated standard to what it actually means.
City of Guelph Water By-law (2024-20910)	City of Guelph	Example Ontario municipal water by-law: meter ownership, freeze-protection responsibility, no-bypass rule.
Weights and Measures Act (R.S.C., 1985, c. W-6)	Government of Canada (Justice Laws)	The federal statute behind Measurement Canada's authority over trade devices, for anyone who wants to read the underlying law.
Ontario Regulation 220/01: Boilers and Pressure Vessels	Government of Ontario (e-Laws)	The regulation TSSA administers for CRN registration, including the water-service exemption clauses that cover most standard meters.
ISO 4064-1:2014 Water meters for cold potable water and hot water, Part 1	International Organization for Standardization	The metrological and technical requirements standard defining Q1-Q4 flow points and accuracy classes, identical to OIML R49-1.
OIML R49-1:2013 Water meters for cold potable water and hot water	International Organization of Legal Metrology (OIML)	Free, direct-download primary text defining accuracy Class 1 and Class 2 maximum permissible errors.
OIML R 49-1:2024 Water meters for cold potable water and hot water, Part 1: Metrological and technical requirements	International Organization of Legal Metrology (OIML)	The source definition of the Q1/Q2/Q3/Q4 flow-rate classes used across the ISO 4064 family of meters.
Weights and Measures Act (R.S.C., 1985, c. W-6), full text	Justice Laws Website, Government of Canada	The primary legal source for Canada's exact gallon and litre definitions (Schedules I and II).
GEN-50: Use in trade of units of measurement defined in the Weights and Measures Act	Measurement Canada (ISED)	Official guidance on which units are legal for trade in Canada, and why a US-gallon register can become a billing problem.
NIST Guide to the SI, Appendix B: Conversion Factors	National Institute of Standards and Technology (NIST)	The authoritative source for the exact US-gallon-to-litre and other volume conversion factors used on the page.
NSF/ANSI/CAN 61 Testing and Certification	NSF International	Explains what NSF/ANSI/CAN 61 certifies and why it matters for any meter touching drinking water.
NSF/ANSI/CAN 372 Technical Requirements	NSF International	The lead-free standard: the 0.25% weighted-average lead rule that separates a real lead-free meter from a marketing claim.

Guides and explainers

Document	Publisher	Use it for
Ultrasonic Flow Meter Working Principle	Bronkhorst	A third manufacturer's knowledge-base explanation of transit-time ultrasonic measurement, useful for readers comparing sources.
City of Guelph Sub-Water Meter Rebate Program	City of Guelph	Guelph's explicit requirement that sub-meters meet AWWA and NSF/ANSI 61 standards.
City of Toronto water meters	City of Toronto	Toronto's mandatory metering and automated meter reading (AMR/AMI) program requirements.
DAE Controls water meters (product category)	DAE Controls LLC	DAE's own catalogue of pulse-output meters, including the budget models we point people to.
How Ultrasonic Flowmeters Work	Dwyer Instruments	A second, instrument-manufacturer take on ultrasonic flow measurement for cross-checking the RealPars explainer.
How to Read a Neptune Water Meter	Flume (help centre)	A plain-language walkthrough of reading a Neptune register and sweep-hand dial, useful for training installers and clients.
Measurement Canada Water Meter Consultation, Introduction	Innovation, Science and Economic Development Canada (Measurement Canada)	The primary source confirming that water meters are currently exempt from Measurement Canada approval. It corrects a common misconception.
FD-Q Series Clamp-on Flow Sensor	Keyence Canada	Keyence's own Canadian product page for the FD-Q, our first-choice clamp-on ultrasonic sensor.
Neptune C&I Meter Comparison Chart	Neptune Technology Group	Neptune's own commercial/industrial meter comparison and sizing matrix, including the MACH 10.
Neptune Technology Group Literature Library	Neptune Technology Group	Index of Neptune's product sheets and manuals by meter family, and the starting point for spec-checking any Neptune model.
Ontario Energy Board Unit Sub-Metering	Ontario Energy Board	Confirms that the OEB's sub-metering licence and Code apply to electricity only, not water, which matters for anyone submetering tenants.
Sensor Spotlight: Pulse Counter	Quantify Environmental	Quantify's own explainer on how a pulse counter turns an existing meter's pulse output into remote monitoring data.
Ultrasonic Flow Meter Explained: Working Principles	RealPars	Clear, vendor-neutral explainer of transit-time vs Doppler ultrasonic flow measurement, aimed at industrial-automation learners.
About the Canadian Registration Number (CRN)	Technical Standards and Safety Authority (TSSA)	TSSA's own explanation of when pressure equipment needs CRN registration in Ontario.
Wolseley Waterworks water meters	Wolseley Canada	A Canadian waterworks distributor's own meter offering page, confirming which utility brands are stocked country-wide.
Sensus products on Xylem Canada	Xylem Canada	Xylem's own Canadian landing page for the full Sensus meter lineup (Cordonel, SR II, accuSTREAM, ally, iPERL, Hydroverse).
ISO 4064 Water Meter Standard: Accuracy Classes, Flow Parameters and Type Testing	YOUNIO Metering	A plain-language walkthrough of ISO 4064 accuracy classes and flow parameters for readers who don't want to buy the standard.

Datasheets and manuals

Document	Publisher	Use it for
AWWA Manual M6 Water Meters: Selection, Installation, Testing, and Maintenance (2018 Addendum)	American Water Works Association	AWWA's own reference manual for selecting, installing and testing water meters, including the addendum covering electromagnetic/ultrasonic (C715) meter testing.
M6 Water Meters: Selection, Installation, Testing and Maintenance (5th ed.)	American Water Works Association (AWWA)	The standard reference manual on choosing, sizing, installing, testing and maintaining utility water meters.
AWWA Manual M6 preview pages (5th edition)	AWWA / ANSI	Free preview of the M6 manual's table of contents and scope, useful before buying the full standard.
City of Hamilton Water Works By-law Resource Manual	City of Hamilton	Detailed Ontario municipal example: AWWA M22 meter sizing, AWWA-standard accuracy testing, and the formal submeter application process.
GF Signet 515/2536 Rotor-X Flow Sensors: Instruction Manual	Georg Fischer (GF Piping Systems)	Full install and wiring manual for the GF Signet 2536 paddlewheel sensor, one of the sensors we specify regularly.
GF Signet 2537 Paddlewheel Flowmeter: Instruction Manual	Georg Fischer (GF Piping Systems)	Full install/wiring manual for the GF Signet 2537, the other named favourite in the same family.
How to Set Up a SCADAmetrics Signalizer with the Neptune MACH 10	Neptune Technology Group / SCADAmetrics	Step-by-step pairing guide for exactly the encoder + Signalizer combination Quantify prefers for consumption readings.
SCADAmetrics Signalizer Model EMP product page	SCADAmetrics	The manufacturer's own page for the Signalizer, the encoder-to-pulse/4-20mA converter central to Quantify's preferred signal chain.

Tools and lookups

Document	Publisher	Use it for
Badger Meter distributor finder (Canada)	Badger Meter	Badger's own territory-based distributor locator for Canadian buyers.
Kamstrup distributor finder	Kamstrup	Kamstrup's distributor locator, useful for confirming current Canadian representation before ordering.
NSF Certified Product Listings search	NSF International	Look up whether a specific meter model actually holds an NSF/ANSI/CAN 61 listing before you buy.
NSF Listing Category Search: Water Meters	NSF International	Look up whether a specific meter model is currently NSF/ANSI 61 or 372 certified for potable water.
ROI Calculators	Quantify Environmental	Our own interactive calculators for the payback on metering and monitoring, water included. A natural next step from this page.
Seametrics distributors	Seametrics	Seametrics' own distributor search tool, the starting point for finding regional stock/support.

Video

Document	Publisher	Use it for
Electromagnetic Flow Measuring Principle: animation and explainer	Endress+Hauser	A manufacturer-produced animation of how a magnetic flow meter (magmeter) actually works, with transcript.
Electromagnetic Flow Measuring Principle (Endress+Hauser) on YouTube	Endress+Hauser (YouTube)	Same magmeter working-principle explainer in standalone video form, for embedding or direct linking.

Not sure which one? Send us the pipe size and a photo of the line.

Most of the time that photo answers half the questions on this page, because the register on the meter you already have tells us what signal we can get off it. We will tell you what we would put in, what it reads in, and what it takes to get it onto a dashboard.

Book a site visit Read about pulse counters

or call 1-833-QUANTFY (1-833-782-6839)

Choosing a water meter

Choose what you need

Total consumption and flow rate are different measurements

Why a factory wants both

Five ways to buy the wrong meter

Build your shortlist

The decision tree in words

Our picks and their limits

Check the operating range

Check a size against the standards

AWWA C700 · Positive displacement 5 sizes

AWWA C700 (manufacturer-stated normal operating range, Sensus SR II) · Positive displacement 3 sizes

AWWA M-22 (High Normal Meter Flow, via Denver Water) · Positive displacement 4 sizes

AWWA C708 · Multi jet 1 size

AWWA C712 (manufacturer claim, DAE) · Single jet 1 size

AWWA C702 · Compound 4 sizes

AWWA M-22 (High Normal Meter Flow, via Denver Water) · Compound 5 sizes

AWWA C701 (Class II, via AWWA M22-04 Table 6-1) · Turbine 2 sizes

AWWA M-22 (High Normal Meter Flow, Turbine Class II, via Denver Water) · Turbine 7 sizes

Manufacturer rating (DAE WP-250N, non-AWWA) · Woltmann 1 size

AWWA C715 Standard Type 1 (Neptune MACH 10, normal operating range @ ±1.5%) · Ultrasonic, inline 5 sizes

ISO 4064 / OIML R49 (illustrative Q1-Q4 worked example from the Australian NMI R49 market, not a Canadian benchmark) · Other 1 size

Connect the output to Quantify

Pulse

Pulse weight and dividers

The rate ceiling almost never binds

Debounce and wiring

4-20 mA

Read-only Modbus, HART, BACnet and M-Bus

Encoder registers, and the encoded trap

Recommended pulse weight by meter size

Specify units and power

Why a Canadian meter reads in US gallons

Three kinds of register

Multipliers and rollover

Display resolution is not pulse resolution

Power

What a display can and cannot do

Check the required approvals

NSF 61 and NSF 372 do different jobs

There is an AWWA standard per technology, not one stamp

Measurement Canada does not approve water meters

Ontario sub-metering rules are about electricity

Two Ontario examples

Hot water needs a different meter

IP67 and IP68 are not interchangeable

Powered meters carry electrical marks too

Food, beverage and pharma run a separate track

Non-potable lines need none of it

CRN: almost every water meter is exempt in Ontario

Compare measuring technologies

Side by side

Compare the catalogue

Side by side

Reference

What to send a distributor

Standards

Guides and explainers

Datasheets and manuals

Tools and lookups

Video

Not sure which one? Send us the pipe size and a photo of the line.