Temperature controller temperature control switch thermostat knob Adjustable thermostat AC 250V 16A 50-300 C Three feet with normally closed and normally open function Specifications: Material: metal, plastic, ceramic Rod diameter: 5mm Rod length: 50mm Cable length: 70cm Voltage: AC 250V Current: 16A Temperature range: 50C - 300C Product life: > 100,000 cycles Electric strength: AC 2000V / 1min Insulation resistance: 100M Contact resistance: 50m Humidity insulation resistance: 10M Temperature response rate: 1.0C/min Minimum current: 200mA Performance principle: When the temperature of the controlled object changes, the working fluid inside the thermostat expands or contracts accordingly due to thermal expansion and contraction (change in working fluid volume). This causes the temperature-sensing bellows to expand or contract, which through a mechanical lever mechanism actuates the switch to turn on or off, achieving constant temperature control. Suitable for: Household appliances (showers, drum washing machines, heaters) Electric equipment (stainless steel automatic water boilers, electric frying pans, food machinery, medical equipment) Refrigeration industry (kitchen freezers, fresh cabinets, refrigerators, ice machines, fish ponds, cold drink machines, heating machines) requiring temperature control Package includes: 1 set of mechanical thermostat