Commonly used thermocouples can be divided into standard thermocouple and non-standard thermocouple two categories. The so-called standard thermocouple refers to the national standard stipulates its thermoelectric potential and temperature relationship, allowable error, and has a unified standard scale of the thermocouple, it has its supporting display instrument to choose from. Non-standardized thermocouples are less than standardized thermocouples in use range or order of magnitude, and there is generally no uniform scale, which is mainly used for the measurement of certain special occasions.
Standardized thermocouple China since January 1, 1988, Thermocouples and Thermistors have been produced in accordance with IEC international standards, and designated S, B, E, K, R, J, T seven standardized thermocouples for China's unified design thermocouple.
