Industrial explosion-proof thermocouple or intrinsically safe thermocouple is a temperature sensor which is widely used in auto-control system. It can convert temperature parameter of controlled object into electrical signals and passes to the display, recording and regulating instruments through the temperature sensor. It is used to test, control and regulate system. In the chemical plant, it often accompanies by a variety of flammable, explosive and other chemical gases, steam, if you use common thermocouples, it is not safe and easy to cause explosion. So In these situations you must use the explosion-proof or intrinsically safe thermocouple as a temperature sensor. Our explosion-proof or intrinsically safe thermocouple products are applied in dIIBT4 ~ dIICT6, ibIIBT4, iaIIBT4, iaIICT6 temperature range group which has explosive gas.