Often used in hazardous locations, such as chemical plants, refineries, and grain elevators, these switches have a housing that’s UL listed for environments with flammable gases, combustible dust, and ignitable fibers. It is UL listed for use in Class I, Divisions 1 and 2, Groups B, C, and D; Class II, Divisions 1 and 2, Groups E, F, and G; and Class III, Divisions 1 and 2 hazardous locations. The housing also meets NEMA 4X for use in washdown environments with splashing water, corrosive liquid, and dust. Install the threaded probe directly into tanks, pipelines, and other process components to turn heating equipment on or off at a specified temperature. Set actuation points with the adjustment dial.

Switch with one actuation point has one SPDT (single pole, double throw) relay. The relay can be set to turn one circuit from off to on (normally open) or from on to off (normally closed).

Switch with two actuation points has two SPDT (single pole, double throw) relays. Each relay can be set to turn one circuit from off to on (normally open) or from on to off (normally closed).

Since these switches don’t have a housing above the probe, they are often used in tight spaces and low-clearance areas. The threaded probe installs directly into tanks, pipelines, and other process components to turn heating equipment on or off at a specified temperature. Use the adjustment screw to set the actuation point. All switches are SPST (single pole, single throw) and control one circuit.

Normally open switches turn the circuit from off to on.

Normally closed switches turn the circuit from on to off.

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

Turn heating equipment on or off in washdown environments. To withstand splashing water, corrosive liquid, and dust, these switches have a housing that meets NEMA 4X. The threaded probe installs directly into tanks, pipelines, and other process components. Use the adjustment dial to set actuation points.

Switches with one actuation point have one SPDT (single pole, double throw) relay. The relay can be set to turn one circuit from off to on (normally open) or from on to off (normally closed).

Switches with two actuation points have two SPDT (single pole, double throw) relays. Each relay can be set to turn one circuit from off to on (normally open) or from on to off (normally closed).

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

Install the threaded probe directly into tanks, pipelines, and other process components to turn heating equipment on or off at a specified temperature. These switches have an adjustment dial to set the actuation point. All are SPDT (single pole, double throw). They can be set to turn one circuit from off to on (normally open) or from on to off (normally closed).

Install the probe directly into drilled and reamed holes to turn heating equipment on or off at a specified temperature. Use the adjustment screw to set the actuation point. All switches are SPST (single pole, single throw) and control one circuit.

Normally open switches turn the circuit from off to on.

Normally closed switches turn the circuit from on to off.

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

Send signals to trigger two different processes, each with their own set temperatures. For example, use one setpoint to turn a heater on and off at one temperature and another to activate an alarm if the temperature rises too far above the cutoff point. Twist the outer ring to adjust your setpoints—no need for tools. After choosing your setpoint, tighten the locking ring to prevent unintentional changes. Once the setpoint is reached, an LED illuminates, indicating the switching status. The threaded probe installs directly into tanks, pipelines, and other process components.

These switches send an electronic PNP signal to your programmable logic controller (PLC), so they’re often used in control and automation applications. They have a micro M12 plug connection and are compatible with micro M12 sockets, allowing you to quickly connect and disconnect the switch.

They are rated IP67 for protection from dust and temporary submersion.

To view switch wiring diagrams, select a part number and click Product Detail.

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

A digital display makes it easy to monitor the temperature and control when these switches turn heating equipment on and off. They have an adjustable reset, so you can change the temperature range between when they activate and deactivate, commonly referred to as deadband and differential. Use the keypad to adjust the setpoint and reset point anywhere on the setpoint range. They produce an electronic signal that is often used to communicate with a programmable logic controller (PLC), so they're common in control and automation applications. Install them directly into tanks, pipelines, and other process components using their threaded probe.

These switches have a micro M12 plug, so you can quickly connect and disconnect them.

Rated IP65 and IP67, these switches protect against dust and water from washdowns and temporary submersion. They’re also UL listed, C-UL listed, and CE marked, so they meet U.S., Canadian, and European safety standards.

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