Use high-frequency sound waves to detect chemical level. This switch has three relays that can be programmed for multiple set points. Use it to activate several alarms or to automate tank filling and emptying. It’s rated NEMA 4X for protection from corrosion and washdowns.

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

Detect objects and liquid or material levels to set off actions in your system—regardless of size, shape, or surface finish. These switches send out high-frequency sound waves that target small areas, so the surface and structure of your object won't affect results like photoelectric sensors, which sense using light. This makes them great for materials with uneven surfaces, such as granules and powder. They also sense objects when obscured by smoke, dust, debris, or water, but they don't work as well where there's wind, since it could disrupt their sound waves. Once an object is detected or a set level is reached, the digital output sends a signal to your controller to turn components in your system on or off. Use their plug to quickly connect and disconnect to cables with a socket (sold separately). UL listed, C-UL listed, and CE marked, all meet American, Canadian, and European safety standards.

Switches with two outputs let you set a minimum level on one output and a maximum on the other—for example, you can keep liquid levels constant by turning on a pump when the level drops too low and turning off the pump when it reaches the maximum.

Switches with IO Link connect to a programmable logic controller (PLC), so you can change settings and receive error messages remotely. You need an IO-Link controller (not included) to connect.

Switches with PNP/NPN signal output automatically produce the signal you need based on the connected device.

90° elbow switches are compact to fit in tight spaces. They’re best for conveyors.

Rated IP67, all of these switches seal out dust and water if briefly submersed. NEMA 6 rated switches also stand up to weather and washdowns.

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

Also known as occupancy sensors, these controls turn lights on when movement is detected and off when an area is unoccupied. The infrared/ultrasonic sensors minimize false activation by detecting heat and motion. They can be set so that only one or both detection methods are required to activate and hold lights on. All have a time delay to turn lights off after a set time. The mounting bracket swivels 90° so that the control can be mounted on a wall or ceiling.

Power controllers (sold separately) are required to switch a 120- or 277-volt AC lighting circuit. They have a relay that switches a maximum 20 amp load.

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

Also known as occupancy sensors, these controls turn lights on when movement is detected and off when an area is unoccupied. All have a time delay to turn lights off after a set time.

Infrared/ultrasonic sensors minimize false activation by detecting changes in heat sources and motion. They can be set so that only one or both detection methods are required to activate and hold lights on.

Ultrasonic sensors detect movement and don’t require a direct view of the occupants.

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

Measure the thickness of material such as metal and plastic. The ultrasonic probe provides highly accurate readings. This gauge comes with a calibration certificate traceable to NIST that states it has passed a test for accuracy. It also includes a USB cord for connecting to your PC. Use the included ultrasonic gel for maximum surface contact.

Use calibration blocks to calibrate your thickness gauge. All blocks have a serial number and come with a calibration certificate traceable to NIST.

Measure the thickness of painted metal without removing the coating. The ultrasonic probe provides highly accurate readings. This gauge comes with a calibration certificate traceable to NIST that states it has passed a test for accuracy. It also includes a USB cord for connecting to your PC. Use the included ultrasonic gel for maximum surface contact.

Use calibration blocks to calibrate your thickness gauge. All blocks have a serial number and come with a calibration certificate traceable to NIST.

This detector converts ultrasonic waves to an audible sound so you can find leaks. Unlike typical leak detectors, this unit doesn’t rely only on the presence of a gas to work, making it suitable for a wider range of applications. In addition to gas leaks, it identifies ultrasonic sound caused by failing solenoids, valves, and bearings.

For systems under 10 psi, use the optional ultrasonic sound generator.