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. Keep the valve fully open to measure the maximum flow rate at zero pressure. Pressure increases as you close the valve. As oil flows through, it pushes an indicator up the scale, showing you the flow rate. The scale rotates 360°, so you can check the flow rate from any angle. These flowmeters are accurate in any mounting orientation. Mount them inline with your pipe system.

These flowmeters are calibrated with oil but can be used with other liquids. If you’re using these with a liquid other than oil, 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.

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).

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.

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Often used in heating, cooking, and power-generating systems, these totalizers measure the total amount of natural gas, propane, and butane that flow through them. They use positive displacement, so they measure the flow by passing specific volumes of gas through their diaphragm. Their total cannot be reset. Mount them inline with your pipe system.

The indicator moves when flow is present, so it’s easy to visually confirm flow from a distance.

Sights with a bronze body are harder and more durable than sights with a brass body for a longer service life.

Sights with a 316 stainless steel body are more corrosion resistant than sights with a brass or bronze body.

Rotor indicator is the most obvious indicator of flow for maximum visibility.

Back window can be backlit to increase the visibility of dark liquids.

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Visually confirm flow and inspect the color and clarity of your process media. These sights have a back window that can be backlit to increase the visibility of dark liquids.

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A ball indicator moves when flow is present so you can confirm flow at a distance. The large tubular window provides an unobstructed view for checking liquid movement, clarity, and color from multiple angles.

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Withstand twice the temperature of standard flow sights for applications with temperatures up to 400° F. These sights let you visually confirm flow and inspect liquid color and clarity. The flapper indicator moves when flow is present, so it’s easy to confirm flow from a distance. Backlight the back window to increase the visibility of dark liquids. The brass body of these sights resists corrosion.

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Since they come factory set to a specific set point, these switches are easier to install than adjustable flow switches. As flowing liquid pushes an internal piston, the switch reads the position of the piston to measure the flow. When the piston passes the set point, the switch actuates. They’re accurate in any mounting orientation.

These switches are calibrated with and measure water accurately. They can also be used with other liquids by applying your liquid’s specific-gravity conversion factor to calculate the new set point.

Choose a fitting material that is compatible with the liquid you intend to run through your line. Bronze and 316 stainless steel fittings resist impact better than plastic fittings.

SPDT (single pole, double throw) switches can either turn one device from off to on (normally open) or from on to off (normally closed).

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Safe to use where flammable gases and combustible dust may be present, these switches activate or deactivate when your flow reaches a factory-set level. All are UL listed for hazardous environments. Because their set point is fixed, they’re ready to go, making them easy to install. They actuate when your flowing liquid or gas pushes their paddle into a set position. These switches are single pole, double throw (SPDT) and can turn one device from off to on (normally open) or from on to off (normally closed). They must be mounted horizontally to function accurately.

These switches are calibrated with water and air. They can also be used with other liquids and gases but may not measure accurately if their viscosity is significantly different.

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