Thermocouple type should be how to distinguish the - Shanghai dragon instrument electric appliance co. , LTD

Commonly used thermocouple could be divided into two types: standard thermocouple and non standard thermocouples. Call thermocouple is refers to the national standard norms by the thermoelectric potential contact temperature, promised to error, and have a consistent standard indexing table of thermocouple, it has the matched display looks to choose from. Informal thermocouple in use range or on the order of magnitude less than standard thermocouple, generally no consistent indexing table, the primary measurement used in some special occasions. S, B, E, K, R, J, T seven canonical thermocouple type thermocouple for our consistent design. Thermocouple index number first S, R, B, N, K, E, J, T wait for a few kinds. S, R, B to precious metals thermocouple, N, K, E, J, T be inexpensive metal thermocouple. The following is the interpretation of the thermocouple indexing number S 10 pure platinum rhodium platinum R platinum rhodium pure platinum 13 B 30 6 K platinum rhodium platinum rhodium pure copper nickel chromium nickel silicon T J iron copper nickel copper nickel N nickel chrome silicon nickel chromium copper nickel (nickel silicon E S type thermocouple) Platinum rhodium - 10 Platinum thermocouple platinum rhodium - 10 Platinum thermocouple ( S type thermocouple) For precious metals thermocouple. Accidentally wire diameter provision of 0. 5 mm, promised to error - 0. The positive (015 mm, SP） In the name of the chemical composition of platinum rhodium, containing rhodium is 10%, platinum-based is 90%, the cathode ( SN) For pure platinum, commonly known as single platinum-rhodium thermocouple. The thermocouple highest use temperature of 1300 ℃ for long, short-term highest use temperature is 1600 ℃.