Rated NEMA 13, these potentiometers protect against debris and splashing oil and coolant. Also known as variable output switches, they vary electrical flow to control speed, volume, and light intensity.

Calibrate, test, and troubleshoot a circuit without having to replace individual resistors. These boxes can apply different resistances to reduce the current in your circuit. For example, they can help calibrate a temperature-sensing circuit for use with an RTD. Adjust the resistance to match different temperature points on your RTD, then see if your circuit reads the correct temperature.

The switches are additive, so you can create any resistance, in whole ohm increments, up to 11,111,110 ohms.

Protect circuits from electrical spikes and surges. You’ll often find these varistors in surge protectors for programmable logic controllers (PLCs) and sensors. Also known as voltage-dependent resistors (VDRs), they change their response based on the voltage. When the voltage is high, their resistance drops to route excess current away from the primary flow. But when voltage is low, their resistance increases, sending current through the primary circuit flow instead of the varistor.

For quick, repeatable adjustments to electronic equipment, these potentiometers adjust and save electrical settings. They’re typically used to control speed, volume, or light intensity. For example, if a conveyor needs different speeds for different tasks, you can program each speed into them. Set the digital display to show the specific measurement unit for your application, such as motor rpm.

Install them in a standard _1/8 DIN panel cutout. They’re NEMA 4X rated to resist corrosion, washdowns, and weather.

Brighten or dim your facility or workstation's light from a control panel. These dimmers fit through a standard panel cutout. Lightly press and hold your finger to adjust the light level. Rated IP67, these dimmers are so watertight they could even handle brief submersion. They also seal out dust.

Dimmers are great if you want to control the brightness from one place but turn the light on or off from a switch somewhere else. For example, you might want to dim a light over your storage area from a main control panel for energy efficiency but still be able to turn it on or off when you enter the area.

Adjust how bright lights are from anywhere. These dimmers use Wi-Fi to sync to a downloadable app on your smartphone or tablet. Use the app to set the brightness, turn lights on and off, and set a lighting schedule. For example, you might set the light to dim during peak sunlight hours. Someone working in the area is still able to turn the brightness up by pressing the top push button on the dimmer. Use up to 20 of these dimmers—even if they’re across different circuits—on the same Wi-Fi network.

Often used in large, open workspaces, these dimmers can be wired on opposite ends of the room to control the brightness of lights on the same circuit.

Pair these potentiometers with a controller to monitor the position of moving parts or send instructions to an electrical system. They have a rod that slides back and forth against an internal resistor, which increases or decreases the voltage flowing out to your controller. To monitor the position of a moving part, such as a robotic component, connect it to the rod. As the part moves, it pushes the rod back and forth, which allows the controller to observe and report the part’s exact position. To use these potentiometers as part of a controls system, connect them to a volume slider or other manual control. When you move the slider, the controller converts its position into instructions for electrical equipment, such as adjusting volume levels. These potentiometers are also called variable output switches.

Often used with high-wattage lights, an external heat sink prevents these dimmers from overheating. They stick out from the wall _1/2 in. to help them disperse heat.