In comparison, a larger temperature coefficient thermistor, a resistance value higher at normal temperature (typically in the thousands over Europe), but poor compatibility, serious nonlinear, temperature range only -50 ~ 300 ℃ so, a large number of used home appliances and automotive temperature measurement and control. Metal heat resistance temperature measurement is generally applicable to sales of armored thermal resistance in the range of -200 ~ 500 ℃, which is characterized by accurate measurement, good stability, reliable performance, application in process control in an extremely wide range. Currently, the main material for the thermal resistance of platinum, copper, nickel and other armored thermal resistance price, the use of these materials is that they are primarily the ratio used in the temperature and resistance temperature ranges are linear relationship, here we mainly introduce platinum resistance thermometer. Platinum is a precious metal, it is very stable physical and chemical properties, especially the ability to strong resistance to oxidation, it is easy to purify, have a good process, can be made very fine platinum wire, with copper, nickel and other metals compared armor Main thermal resistance, a higher resistivity, high reproducibility armored thermal resistance, is an ideal material for thermal resistance, the disadvantage is the temperature coefficient of resistance is small, easy to work in reducing medium brittle, price too expensive. _ The main armored force measuring thermal resistance since the instrument armored thermal resistance _ Fujian armored thermal resistance measured by the 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.