Electric heater thermostat Principle of performance and Application: When the temperature of the controlled object is changed,the inner working substance of thermostat sensible bulb produce a corresponding thermal expansion and contraction physical phenomenon (the working substance volume change), at which connected withthe diaphragm of sensible bulb produce expansion or contraction. Through the leverage to drive switch on/off action, the purpose is to achieve constant temperature. F2000/A2000 series thermostats have temperature control accurate, reliable,small differential, temperature adjustmentrange, and large overload current performance characteristics. Usage: To be applied to home Appliances industry(shower bath fitting,tumbling-box washing machine, fan heater), electrical heating appliance(Stainless steel automatic water boiler, built-in electric oven, frying pan, food machinery, armarium,), Refrigeration industry(kitchen refrigerator,chiller, cold storage, ice maker,fishpond, Beverage machine, heater) for temperature control use.