PT100 platinum thermistors are commonly used in industry. Most metal conductors have this property in terms of resistance change with temperature, but not all metal conductors can be used as thermal resistance. The general requirements for thermal resistance of metal materials are as follows: as large and stable temperature coefficient as possible, large resistivity (reduce the size of the sensor at the same sensitivity) and stable chemical and physical properties in the temperature range of use, good reproducibility of materials , and the functional relationship between resistance and temperature.

Common PT100 temperature sensing elements include ceramic elements, glass elements, and mica elements, which are made of platinum wires wound on ceramic skeletons, glass skeletons, and mica skeletons through complex processes.