A thermocouple type thermocouple type K ( Nickel chrome - Nickel silicon) WRK series, N ( Nickel chromium silicon - Nickel silicon magnesium) WRN series, E ( Nickel chrome - Copper and nickel) WRE series, J ( Iron - Copper and nickel) WRJ series, T ( Copper - Copper and nickel) WRT series, S ( Platinum rhodium - 10 Platinum) Type (WRD series, R Platinum rhodium - 13 Platinum) WRR series, type B ( Platinum rhodium - 30 Platinum rhodium (6) WRB series and so on. The structure of thermocouple thermocouple heat is the basic structure of electrode, insulation and protection tube; And display instrument and record instrument or computer systems. According to the environment in the field use, developed into a variety of factors such as measured medium is suitable for all kinds of thermocouple. Thermocouple is divided into simple fabricated thermocouple, thermocouple and a special form of thermocouple; Segmentation by using environment with high temperature thermocouples, wear-resistant thermocouple, thermocouple, corrosion resistance to high pressure thermocouple, thermocouple, flame-proof aluminum liquid temperature with thermocouple, circulating fluidized bed with thermocouple, cement rotary kiln with thermocouple, anode baking furnace with thermocouples, high temperature hot blast stove with thermocouple, stove with thermocouples, with thermocouple carburizing furnace, high temperature salt bath furnace with thermocouple, copper, iron and steel with thermocouple, antioxidant tungsten-rhenium thermocouples, vacuum furnace with thermocouple, platinum, rhodium thermocouple, etc.