Rated IP65 and NEMA 4X to seal out water and dust, these temperature controllers turn your equipment on and off in areas with frequent washdowns. They're the simplest type of temperature controller, so they switch your heater or other device fully on or off without a middle state when they reach a given temperature. These controllers work great as alarms and in systems that can't handle rapid switching or have slow temperature changes. However, you shouldn't use them in processes that require precise control over temperatures.

To read temperature, these controllers use a highly sensitive thermocouple or RTD probe (not included). Their mechanical relay actuates circuits directly. All are SPDT (single pole, double throw) and can turn one circuit from off to on (normally open) or on to off (normally closed). Since these controllers reset automatically, they turn off and on again as the temperature fluctuates. Use the keypad to set the actuation point, reset point, and other settings. Mount them into instrument panel cutouts.

These controllers have UL recognized components and are CSA certified and CE marked, so they meet American, Canadian, and European safety standards.