... , Thermocouple, Thermometer, Thermostat Wiring, HVAC, HVAC Thermostat, Probe Thermostat,Electric water heater thermostat PRINCIPLE OF OPERATION: With temperature rise, the expansion of ... temperature controlLong life usageAlso widely used in most household appliances (electric kettle, electric heater, oven, rolling-type washing machine, water boiler etc.), refrigeration ...