1/2″ Bi-Metal Snap Disc Thermostats

Senasys 1/2″ Bi-Metal Snap Disc Thermostats are quality-engineered thermal sensors specifically designed for a variety of major appliances, including clothes dryers, hot liquid and food-dispensing machines, room unit and space heaters, air conditioning systems, copy machines, engine heaters, and wood stoves.

Made to open or close on a temperature rise, the 1/2” Thermostat is rated up to 15 AMPS-240 Volts, meets UL Standards 873 and 353 and is available in a single-pole, single-throw device. Temperature calibrations are preset, and all units are subject to 100% mechanical and thermal inspection.

custom options

Designed & manufactured to meet requirements of original equipment manufacturers worldwide.

high quality

Senasys products are 100% tested before they leave our facilities.


Senasys products are UL/cUL Recognized.

made in u.s.a.

Senasys products are designed & manufactured in Eau Claire, Wisconsin, U.S.A.

Automatic Reset Snap Disc Thermostat

This type of control can be built to either open or close its electrical contacts as the temperature increases. Once the temperature of the bimetal disc has returned to the specified reset temperature, the contacts will automatically return to their original state.

Epoxy Sealed Snap Disc Thermostat

The 431 series encapsulated 1/2″ automatic reset snap discs are used whenever a moisture or dustproof enclosure is required for safe, sensitive and reliable operation. These thermostats are automatic reset.

Manual Reset Snap Disc Thermostat

This type of control is available only with electrical contacts that open as the temperature increases. The contacts may be reset by manually pushing on the reset button after the control has cooled below the open temperature calibration.