For monitoring flow at a glance, these switches have a plastic window with a rotor indicator that spins when there’s flow. They activate or deactivate equipment when the flow rate reaches your set point. Tighten or loosen the adjustment screw to choose your set point anywhere within the range. To measure flow, they count how many times the turbine turns as liquid flows through. Use them only with clean, low-viscosity liquids to prevent clogging the turbine and other damage. All are single pole, double throw (SPDT) and can either turn one device from off to on (normally open) or on to off (normally closed).

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

Choose a fitting material that is compatible with the liquid you're running through your line. Brass and 316 stainless steel fittings resist impact better than polypropylene fittings.

Flow switches with any mounting orientation will measure accurately no matter how you orient them in your system.

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

Activate or deactivate equipment when your flow rate reaches a set point. These switches have an adjustment screw to select your specific flow rate within the set point range. 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. 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’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.

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

Accurate even in applications where pressure fluctuates regularly, these flow switches split flow into two paths and measure their difference in pressure drop to calculate the flow rate of liquid. They activate or deactivate equipment when the flow rate reaches your set point. Tighten or loosen the adjustment screw to choose your set point anywhere within the range. They measure accurately no matter their mounting orientation. All are single pole, double throw (SPDT) and can either turn one device from off to on (normally open) or on to off (normally closed). Rated NEMA 4X and IP66, they seal out dust and protect against washdowns and corrosion.

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

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

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.

When these switches reach a set flow rate, they send digital signals to your programmable logic controller (PLC) to activate automated controls or alarms. Use the adjustment screw to select their set point. 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 must be mounted horizontally to function correctly. IP rated, they withstand dust, washdowns, and temporary submersion.

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.

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

Measure the flow rate of oil at pressures up to 3,600 psi to activate or deactivate equipment. Designed to compensate for viscosity and density changes, these switches have an adjustment screw to select your specific flow rate within the set point range. 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. 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). Their IP65 rating protects them from dust and low-pressure washdowns, such as from a garden hose. All are accurate in any mounting orientation.

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

Avoid complicated inline installation—these flow switches insert into a tee or pipe outlet, so you don’t need to disassemble your pipeline. They have a paddle that’s pushed as your liquid moves through to determine flow. When the paddle reaches a set position determined by the set point, it activates or deactivates equipment. They are single pole, double throw (SPDT) and can either turn one device from off to on (normally open) or on to off (normally closed). They should be mounted vertically into a large-diameter horizontal pipeline, so liquid pushes the paddle.

These flow switches 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.

Switches with a brass or 316 stainless steel body have multiple paddles you can choose between to get you closest to your set point. For a higher set point, loosen the locking washers to remove the largest paddles. You can also trim the paddles to fine-tune your set point. The more you trim, the higher the set point.

Choose a fitting material that is compatible with the liquid you're running through your line. Brass and 316 stainless steel fittings resist impact better than Noryl plastic fittings. NEMA 4X rated switches protect against dust, weather, and washdowns.

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

Easy to install, these flow switches come already set to a specific set point and don’t require you to disassemble your pipeline. Instead of mounting them inline, insert them into an unthreaded PVC pipe tee or pipe outlet in large-diameter pipe. They have a paddle that’s pushed as your liquid moves through to determine flow. When the paddle reaches a set position determined by the set point, it activates or deactivates equipment. All are single pole, double throw (SPDT) and can either turn one device from off to on (normally open) or on to off (normally closed). IP rated, they seal out dust and can be lightly rinsed.

They should be mounted vertically into a horizontal pipeline, so liquid pushes the paddle. Secure them with PVC cement and primer (not included).

These flow switches 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 technical drawings and 3-D models, click on a part number.

Instead of disassembling your system for inline installation, thread these flow switches onto a mounting adapter (sold separately) and insert them into a pipe tee or pipe outlet. They send digital signals to your programmable logic controller (PLC) to activate automated controls or alarms when they reach a set flow rate. To calculate the flow rate, they generate a small amount of heat, then measure the cooling effect your liquid or gas has on it. This makes them ideal in applications with fluctuating temperatures. Use the buttons on the display to adjust the set point and other settings. These switches are accurate in any mounting orientation.

IP65 rated switches protect against dust and washdowns. IP67 rated switches withstand temporary submersion.

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

Send flow rate data using these transmitters while also being able to visually confirm liquid is flowing. They measure flow by counting how many times the turbine turns as the liquid moves through it. To prevent clogging the turbine and other damage, use them only with clean, low-viscosity liquids. These transmitters, also known as transducers, convert the flow measurement to an electrical signal that can be interpreted by receiving devices, such as remote displays and programmable logic controllers (PLCs), to monitor flow or control equipment. Mount them directly inline with your system. They measure accurately in any mounting orientation.

These transmitters 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.

Transmitters with an analog output increase their output signal as flow increases. For your receiving device to interpret the signal, you will need to calibrate it for the measurement range and output signal of the transmitter. They only give accurate readings within the rated measurement range.

Transmitters with a digital pulse output send flow data using spikes of voltage that match the input voltage of the transmitter. The higher the flow, the more pulses they send.

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

Send flow rate measurements to monitor and control equipment. Also known as transducers, these transmitters convert flow rate measurements to an electrical signal that can be interpreted by receiving devices, such as remote displays and programmable logic controllers (PLCs). As flow increases, the output signal increases. For your receiving device to interpret the signal, you will need to calibrate it for the measurement range and output signal of the transmitter. They only give accurate readings within the rated measurement range. Mount them directly inline with your system. They measure flow correctly no matter their mounting orientation.

These transmitters 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.

Variable-area transmitters determine flow rate by tracking where the liquid pushes an internal piston.

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

Send flow rate and temperature measurements simultaneously to a programmable logic controller (PLC), data logger, or other receiving device. Used to monitor status or control equipment, these transmitters, also known as transducers, convert measurements to an electrical signal that is interpreted by receiving devices. As flow or temperature increases, the output signal increases. For your receiving device to interpret the signal, you will need to calibrate it for the measurement range and output signal of the transmitter. They only give accurate readings within the rated measurement range. Mount them inline with your pipe system. They’ll measure flow correctly in any mounting orientation.

A digital display makes it easy to view readings and adjust settings at the source. To change settings and receive error messages remotely from your PLC or computer, program one of the outputs to use IO Link. You’ll need an IO Link controller (not included) to connect to your interface.

Variable-area transmitters determine the flow rate by tracking where the liquid pushes the piston. They have two configurable outputs. One can be wired as an analog output or a digital switch. The other one can be wired as a digital switch, digital pulse output, or IO Link. Pulse outputs send flow data using spikes of voltage that match the input voltage of the transmitter. The higher the flow, the more pulses they send. These transmitters are calibrated with water, glycol solutions, and coolants but can be recalibrated in the field for other liquids.

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

Also known as magmeters, these transmitters use a magnetic field to measure flow rate and temperature with high accuracy. Because they use a magnetic field, they only work with conductive liquids, such as water. These transmitters, also known as transducers, convert measurements to an electrical signal that can be interpreted by receiving devices, such as remote displays and programmable logic controllers (PLCs) to monitor flow or control equipment. For your receiving device to interpret the signal, you will need to calibrate it for the measurement range and output signal of the transmitter. As flow or temperature increases, the output signal increases. These transmitters have one analog output for flow and another for temperature. They only give accurate readings within the rated measurement range. A digital display makes it easy to view readings and adjust settings at the source. Mount these transmitters inline with your pipe system. They measure flow correctly in any mounting orientation.

These transmitters are calibrated with water. They can only be used with liquids with a conductivity of at least 20 µS/cm.

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

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. A complete transmitter consists of a flow transmitter, display, and mounting hardware kit (all components sold separately). Flowing liquid turns the turbine in the transmitter, while the easy-to-read display counts the number of turns to measure and transmit the flow. The display also shows total and batch flow volumes. Use these transmitters with clean, low-viscosity liquids to avoid clogging or other damage to the internal parts. Mount them inline with your pipe system. They’re accurate in any mounting orientation.

Also known as transducers, these transmitters help you monitor status or control equipment by converting measurements to a digital pulse that can be interpreted by receiving devices. Each pulse is a spike of voltage. The higher the flow, the more pulses they send. For your receiving device to interpret the signal from the transmitter, you will need to calibrate it for the measurement range and output signal of the transmitter. Transmitters will only provide accurate readings within the rated measurement range.

The transmitters are calibrated with water but can be used with other liquids.

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