Technology: thermocouple root of the two different conductor material composition, measuring end-to-reference them with a temperature will result in thermoelectric power, the instrument will show thermoelectric potential value of the corresponding temperature. Applications: Used in air, gases, liquids, solids and surface temperature measurement. It records and electronic instruments or the use of computer matching. Features: It can test different medium temperature (0-1300 ℃). Machinery must high pressure good performance.