Sensor Thermocouple provided by us is a type of temperature sensor. It is made up of two distinct metals that are linked at one end. When the two metals' junction is heated or cooled, a voltage is produced that can be linked to the temperature. This is very effective and safe to use. Sensor Thermocouple is used to measure temperature. It's a gadget that's installed inside a gas furnace to help the pilot light keep the furnace running and safe. It functions as a fail-safe to prevent unburned gas.