Currently thermocouple international application having a standard specification, the provisions of international thermocouple into eight different indexing, respectively, B, R, S, K, N, E, J and T, the minimum temperature can be measured measurement of minus 270 ℃ wholesale armored thermal resistance up to 1800 ℃ armored thermal resistance price, where B, R, S thermocouples are platinum series, due to platinum are precious metals, so they are called precious metal thermocouples and left then known under several cheap metal thermocouples. Thermocouple structure, there are two common type and armored. 2.3 RTD 2.3.1 visual inspection to check the overall appearance of the thermal resistance of the appearance of the integrity of the main armored thermal resistance, and its overall appearance should be complete, non-shedding coating, thermal resistance junction box no cracks, sealed, fixing screws complete. 2.4 for medium temperature pressure casing, metal inspection by metal chamber. Steel materials shall comply with the requirements and should be resistant to 1.25 times the working pressure tightness test (within one minute should not leak), there should not be any impurities within the casing. Armored thermal resistance production, since the instrument armored force measuring thermal resistance, heat resistance, Anhui armored force measured by Shanghai Automation Instrumentation Co., Ltd. Shanghai Automation Instrumentation Co., force measurement (www.licesh.com) is the Shanghai Zhabei District, flow meters leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Since the force measuring device leadership with the staff warmly welcome all inquiries negotiations to create the force measuring instrument since a better future.