The practical application of thermal resistance

The most widely used thermoelectric materials are platinum and copper: platinum has high resistance accuracy, is suitable for neutral and oxidizing media, has good stability, and has a certain degree of nonlinearity. The higher the temperature, the smaller the rate of resistance change; Copper resistance has a linear relationship with temperature within the temperature measurement range, with a large number of temperature lines. It is suitable for non corrosive media, and is prone to oxidation if it exceeds 150. The most commonly used ones in China include R0=10 Ω, R0=100 Ω, and R0=1000 Ω, with graduation numbers of Pt10, Pt100, and Pt1000, respectively; There are two types of copper resistors, R0=50 Ω and R0=100 Ω, with their division numbers Cu50 and Cu100. Among them, Pt100 and Cu50 are the most widely used.