Immersion / cartridge thermostats switch on or off an electrical circuit based on the temperature it senses. A calibration process is performed during the manufacturing process which sets the thermostat to the requested temperature.
These immersion / cartridge thermostats utilize thermo sensitive bimetallic elements, optimum thermal contact with the cartridge housing that actuates a pair of switch members to open and close internal contacts in response to temperature change. The bi-metal is electrically insulated from the switch blades. Thermal strain relief is incorporated to prevent calibration drift.