thermostat, home heater ,oven ,electric water heater, water boiler, warm air ... air heater,washing machine, firer, kitchen equipment, etc. 2) Designed temperature: -30 centigrade to +350 centigrade 3) On-off ... temperature difference: 2 centigrade to 12 centigrade 4) Service temperature control range: 0 to 40, 30 ... or SKYPE . Then we can talk more detail on line. thermostat