Paddlewheel Flowmeters | McMaster-Carr

Filter by

Pipe Size

Maximum Flow

Body Material

Minimum Flow

Thread Type

Flow Measurement Unit

Gender

Fitting Connection

Maximum Temperature

Maximum Pressure @ Temperature

180 psi @ 70° F

300 psi @ 70° F

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

RoHS

Wetted Parts Material

End-to-End Length

Component

Battery Life

Enclosure Rating

Battery Size

Environment

Measurement Unit

Connection Port

Maximum Batch Number Displayed

9,999

999,999

Maximum Number Displayed

Totalization Type

33 Products

About Flowmeters and Totalizers

Flowmeters measure the rate of flow for a liquid or a gas. Totalizers measure the cumulative flow volume. Flowmeter/totalizers display both the flow rate and the cumulative flow volume.

Socket-Connect Flowmeter/Totalizers with Remote Display

Often used in hard-to-access areas, these flowmeter/totalizers have a display that can be placed up to 25 feet from the sensor. Use them to measure the rate and volume of liquid flowing through your system. They measure flow by counting how many times their turbine turns as liquid flows through. To avoid clogging the turbine and other damage to the sensor, use them only with clean, low-viscosity liquids. Batch totals are resettable but can be protected with a security code to prevent tampering. The reset function can also be disabled so that they operate as a cumulative totalizer. Cumulative totals cannot be reset. No matter the mounting orientation, they’ll measure flow correctly.

These flowmeter/totalizers are calibrated with water. You can use them with other liquids, but they may not measure accurately if the liquid’s viscosity differs from water.

For a complete unit, you’ll need a display, a sensor, and a tee fitting (all sold separately).

Displays are rated NEMA 4X and IP65 for protection against dust, weather, washdowns, and corrosion.

Sensors thread onto the tee fitting (sold separately).

Tee fittings mount inline with your pipe. They have two unthreaded socket ends that bond to unthreaded PVC pipe with PVC cement and primer.

For technical drawings and 3-D models, click on a part number.

Display

					For Panel Cutout
Max. Total Volume	Accuracy	Max. Pressure	Temperature Range, °F	DIN Trade Size	Ht., mm	Wd., mm	Dp., mm	Batteries Included	Environmental Rating		Each
9,999 gallons, 9,999 liters	±0.5%	180 psi @ 70° F	33° to 149°	1/4	96	96	41	Yes	IP65, NEMA 4X	00000000	0000000

Optional Surface-Mounting Bracket (Four 3/16" × 3/4" Mounting Slots)

0000000

Each

000000

Sensor

Polypropylene Plastic Body
Pipe Connection	End-to-End Lg.	Accuracy	Max. Pressure	Temp. Range, °F	Mounting Orientation		Each
1 1/4 NPSM	4.1"	±1%	180 psi @ 70° F	33° to 149°	Any	00000000	0000000

Replacement Titanium Rotor Pins	0000000	Each	000000
Replacement PVDF Plastic Rotors	0000000	Each	000000

Tee Fittings

Pipe Connections
Inlet/Outlet	Sensor	Pipe Schedule	Flow Range, gpm	Max. Pressure	Temp. Range, °F	Mounting Orientation		Each
PVC Plastic Body
1/2 Socket-Connect Pipe	1 1/4 NPSM Threaded Male Pipe	80	1 to 18.9	180 psi @ 70° F	33° to 149°	Any	00000000	0000000
3/4 Socket-Connect Pipe	1 1/4 NPSM Threaded Male Pipe	80	1.7 to 33.2	180 psi @ 70° F	33° to 149°	Any	00000000	000000
1 Socket-Connect Pipe	1 1/4 NPSM Threaded Male Pipe	80	2.7 to 53.9	180 psi @ 70° F	33° to 149°	Any	00000000	000000
1 1/2 Socket-Connect Pipe	1 1/4 NPSM Threaded Male Pipe	80	6.4 to 126.9	180 psi @ 70° F	33° to 149°	Any	00000000	000000
2 Socket-Connect Pipe	1 1/4 NPSM Threaded Male Pipe	80	10.5 to 209.2	180 psi @ 70° F	33° to 149°	Any	00000000	000000
3 Socket-Connect Pipe	1 1/4 NPSM Threaded Male Pipe	80	23 to 460.8	180 psi @ 70° F	33° to 149°	Any	00000000	000000

High-Temperature Flowmeter/Totalizers

With one meter, these flowmeter/totalizers measure the flow rate and total flow volume of high-temperature liquid up to 200° F. They count how many times their turbine turns as liquid passes through to measure flow. To avoid clogging the turbine and other damage to the sensor, use them only with clean, low-viscosity liquids. The batch total can be reset after each metering application. They come set for batch totalization, but you can disable the reset function to operate as a cumulative totalizer. They measure flow correctly no matter the mounting orientation.

These flowmeter/totalizers are calibrated with water. You can use them with other liquids, but they may not measure accurately if the liquid’s viscosity differs from water.

Flowmeter/Totalizers

Flowmeter/Totalizer

				Max. Volume, gallons
Pipe Connections	Flow Range, gpm	End-to-End Lg.	Accuracy	Total	Batch	Max. Pressure	Temp. Range, °F	Seal Material	Mounting Orientation	Batteries Included	Environmental Rating		Each
Polypropylene Plastic Body with Polypropylene Plastic Fittings
3/8 NPT Male	0.8 to 8	4 3/4"	±2%	99,999.9	999,999	300 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	0000000
1/2 NPT Male	2 to 20	5 1/8"	±2%	99,999.9	999,999	300 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
3/4 NPT Male	3 to 30	5 1/4"	±2%	99,999.9	999,999	300 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
1 NPT Male	5 to 50	5 5/8"	±2%	99,999.9	999,999	300 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
1 1/2 NPT Male	6 to 60	6 1/2"	±2%	99,999.9	999,999	300 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
2 NPT Male	10 to 100	6 3/4"	±2%	99,999.9	999,999	300 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000

Replacement Parts

Replacement Axle

Replacement Paddle-Axle Kit

Component		Each
Axle	00000000	000000
Paddle-Axle Kit	00000000	000000

High-Temperature Flowmeters with Digital Display

Check the flow rate of liquids up to 200° F from an easy-to-read digital display instead of a scale or dial. These flowmeters measure flow by counting how many times their turbine turns as liquid flows through. To avoid clogging the turbine and other damage to these flowmeters, use them only with clean, low-viscosity liquids. Mount them inline with your pipe system. Their fittings are polypropylene, which works with a wide range of chemicals. NEMA and IP rated, these flowmeters stand up to dust, weather, corrosion, and water from washdowns.

These flowmeters are calibrated with water but can be used with other liquids. If you’re using these with a liquid other than water, you’ll need to calculate the flow rate by multiplying the number shown on the scale by the specific-gravity conversion factor for your liquid.

Flowmeters

Flowmeter

Polypropylene Plastic Fittings
Flow Range, gpm	End-to-End Lg.	Overall Ht.	Accuracy	Max. Pressure	Temp. Range, °F	Body Material	Seal Material	Mounting Orientation	Batteries Included	Environmental Rating		Each
3/8 NPT Male Pipe Connection
0.4 to 4	4 3/4"	5 3/8"	±2%	300 psi @ 70° F	33° to 200°	Polypropylene Plastic	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	0000000
0.8 to 8	4 3/4"	5 3/8"	±2%	300 psi @ 70° F	33° to 200°	Polypropylene Plastic	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
1/2 NPT Male Pipe Connection
2 to 20	5 1/8"	5 3/8"	±2%	300 psi @ 70° F	33° to 200°	Polypropylene Plastic	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
3/4 NPT Male Pipe Connection
3 to 30	5 1/4"	5 5/8"	±2%	300 psi @ 70° F	33° to 200°	Polypropylene Plastic	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
1 NPT Male Pipe Connection
5 to 50	5 5/8"	5 5/8"	±2%	300 psi @ 70° F	33° to 200°	Polypropylene Plastic	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
1 1/2 NPT Male Pipe Connection
6 to 60	6 1/2"	6 1/8"	±2%	300 psi @ 70° F	33° to 200°	Polypropylene Plastic	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
2 NPT Male Pipe Connection
10 to 100	6 3/4"	6 3/8"	±2%	300 psi @ 70° F	33° to 200°	Polypropylene Plastic	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
20 to 200	6 3/4"	6 3/8"	±2%	300 psi @ 70° F	33° to 200°	Polypropylene Plastic	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000

Replacement Parts

Replacement Axle

Replacement Paddle-Axle Kit

Component		Each
Axle	00000000	000000
Paddle-Axle Kit	00000000	000000

High-Temperature Totalizers with Digital Display

The digital display on these totalizers makes it easy to check the total amount of high-temperature liquid—up to 200° F—passing through your system. They measure flow volume by counting how many times their turbine turns as liquid passes through. To avoid clogging the turbine and other damage to these totalizers, use them only with clean, low-viscosity liquids. The batch total can be reset after each metering application. They come set for batch totalization, but you can disable the reset function to operate as a cumulative totalizer. They measure flow accurately no matter the mounting orientation. Rated NEMA 4X and IP65, they seal out dust and protect against washdowns and corrosion.

These totalizers are calibrated with water. You can use them with other liquids, but they may not measure accurately if the liquid’s viscosity differs from water.

Totalizers

Totalizer

				Max. Volume, gallons
Pipe Connections	Flow Range, gpm	End-to-End Lg.	Accuracy	Total	Batch	Max. Pressure	Temp. Range, °F	Seal Material	Mounting Orientation	Batteries Included	Environmental Rating		Each
Polypropylene Plastic Body with Polypropylene Plastic Fittings
3/8 NPT Male	0.8 to 8	4 3/4"	±2%	99,999.9	999,999	300 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	0000000
1/2 NPT Male	2 to 20	5 1/8"	±2%	99,999.9	999,999	300 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
3/4 NPT Male	3 to 30	5 1/4"	±2%	99,999.9	999,999	300 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
1 NPT Male	5 to 50	5 5/8"	±2%	99,999.9	999,999	300 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
1 1/2 NPT Male	6 to 60	6 1/2"	±2%	99,999.9	999,999	300 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000
2 NPT Male	10 to 100	6 3/4"	±2%	99,999.9	999,999	300 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any	Yes	IP56, NEMA 4X	0000000	000000

Replacement Parts

Replacement Axle

Replacement Paddle-Axle Kit

Component		Each
Axle	00000000	000000
Paddle-Axle Kit	00000000	000000