Thermal resistance sensors mainly use the characteristic that the resistance value changes with temperature to measure temperature and temperature-related parameters. This kind of sensor is more suitable in situations where temperature detection accuracy is required to be relatively high. The more widely used thermal resistance materials are platinum, copper, nickel, etc. They have the characteristics of large temperature coefficient of resistance, good linearity, stable performance, wide operating temperature range, and easy processing. Used to measure temperatures within the range of -200°C to +500°C. And with the development of science and technology, the temperature measurement range of thermal resistance sensors has also expanded. In terms of low temperature, it has been successfully used in temperature measurement of 1 ~ 3K. In terms of high temperature, there are also a variety of thermal resistance sensors for 1000 ~ 1300℃.