Water Flowmeters | McMaster-Carr

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878 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.

Flowmeters

Check the flow rate of liquids in your system.

Easy-Read Flowmeters

A large dial instead of a scale makes it easier to read the flow rate from a distance.

Any-Orientation Flowmeters

A spring piston instead of a float allows these flowmeters to measure flow rate in any mounting orientation.

High-Temperature Flowmeters

Measure the flow rate of liquids up to 212° F.

High-Temperature and Pressure Flowmeters

Clog-Resistant Flowmeters

Liquids with particles up to 1/8" in diameter won't clog this flowmeter.

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.

Impact-Resistant Flowmeters

A 304 stainless steel case protects these flowmeters from blows that could shatter the glass body.

Flowmeters for High-Purity Liquids

To avoid metal contaminating liquids, such as deionized water, these flowmeters are made entirely of plastic and rubber.

Socket-Connect Flowmeters

Easily install the unthreaded ends of these flowmeters into a PVC piping system.

Flowmeters with Flow Switch

Monitor the flow rate of liquids and use the integrated switch to turn equipment on and off, or activate an alarm when liquid reaches a set flow rate.

Flanged Flowmeters

Install these flowmeters securely into large pipelines with the flanged ends.

Panel-Mount Flowmeters

Fittings on the back let you install these flowmeters in instrument panels.

Impact-Resistant Panel-Mount Flowmeters

Install these flowmeters in an instrument panel where they might be exposed to blows and other impact.

High-Temperature Panel-Mount Flowmeters

Install these flowmeters in an instrument panel to measure the flow rate of hot water and other liquids reaching up to 212° F.

Insertion Flowmeters

No need to disassemble your PVC pipeline—insert these flowmeters into a drilled hole and secure them using the included clamps.

Portable Noncontact Flowmeters

Often used to pinpoint flow issues, these flowmeters clamp onto pipe, so you can spot-check the flow rate at different points without disassembling your system. They measure by tracking the time it takes for ultrasonic waves to pass through your liquid, so they don’t need to come into contact with your liquid.

Flowmeters for Oil

High-Temperature and Pressure Flowmeters for Oil

If the oil in your line is too hot or pressurized for standard flowmeters, use these flowmeters to measure the flow rate.

Any-Orientation Flowmeters for Oil

With a spring piston instead of a float, these flowmeters measure the flow rate of oil in any mounting orientation.

Flow- and Pressure-Testing Flowmeters for Oil

Often used to find worn components or leaks, these flowmeters have a valve, so you can test the flow of oil from pumps and other equipment at different pressures.

Flow Transmitters

Noncontact Flow Transmitters

Using ultrasonic waves, these transmitters measure the flow rate of your liquid from outside your pipe.

High-Accuracy Flow and Temperature Transmitters

Also known as magmeters, these transmitters use a magnetic field to measure flow rate and temperature with high accuracy.

Flow Transmitters with Sight

Send flow rate data using these transmitters while also being able to visually confirm liquid is flowing.

Flow Transmitters

Send flow rate measurements to monitor and control equipment.

Flow and Temperature Transmitters

Send flow rate and temperature measurements simultaneously to a programmable logic controller (PLC), data logger, or other receiving device.

Flow Transmitters for Flanged Pipe

Install these transmitters between two flanges in a flanged pipe system to measure flow rate and send the data to a remote display or programmable logic controller (PLC). For easy cleaning and maintenance, you can slide the transmitter out from between the flanges.

Ultra-Low-Flow Flow Transmitters

Often used in low-flow metering applications for lubricants or antifreeze, these transmitters measure flow rate and send the data to a remote display or programmable logic controller (PLC).

Insertion Flow and Temperature Transmitters

Thread a ring fitting into your pipe connection and insert the probe of these transmitters to measure the flow and temperature of water, oil, or air.

Flowmeter/Totalizers

Determine the flow rate and total volume of liquid flowing through your system with the same meter.

Socket-Connect Flowmeter/Totalizers

The unthreaded ends of these flowmeter/totalizers install into a PVC piping system, so you can measure the flow rate and volume of liquid passing through your system.

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. They connect to unthreaded PVC pipe.

Flowmeter/Totalizers with
Sanitary Quick-Clamp Fittings

Easy to remove for cleaning and maintenance, these flowmeter/totalizers connect to sanitary quick-clamp fittings (often called tri-clamp fittings) and measure the flow rate and volume of liquid passing through your system.

Flanged Flowmeter/Totalizers

Using the flanged ends, securely install these flowmeter/totalizers in large, high-flow pipelines to measure the flow rate and total volume of liquid flowing through.

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.

Flowmeter/Totalizers for Oil and Fuel

Use these flowmeter/totalizers to measure both the flow rate and total flow volume of oil, gasoline, diesel fuel, and kerosene.

Totalizers

Measure the total amount of liquid flowing through these totalizers.

High-Temperature Totalizers

Use these totalizers to measure the total amount of liquid up to 200° F flowing through your pipe system.

Totalizers with Digital Display

A digital display makes it easy to check both the total amount of liquid that’s flowed through and the batch total.

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.

Totalizers for Drinking Water

Meeting NSF/ANSI 61, these totalizers measure the cumulative amount of drinking water flowing through them.

Flanged Totalizers for Drinking Water

Flanged ends let you securely integrate these totalizers into large drinking water pipelines to measure the cumulative amount of water flowing through them.

Remote-Reading Totalizers for Drinking Water

Often used in hard-to-access areas, these totalizers let you monitor the total amount of drinking water flowing through them up to 250 feet away.

Totalizers for Grease

Install this totalizer on your grease gun or valve to measure grease dispensing and reduce waste.

Totalizers with Digital Display for Fuel

Track batches and the total amount of gasoline, diesel fuel, and kerosene passing through your system.

Totalizers for Fuel

Determine the amount of gasoline, diesel fuel, and kerosene that flows through these totalizers.

Totalizers for Oil

Measure the amount of light oil that flows through these totalizers.