In the power industry, temperature monitoring is crucial for the safe operation of equipment. Bimetallic thermometers are widely used in places such as power plants and substations to monitor the temperature of electrical equipment. Regular calibration of bimetallic thermometers can timely detect deviations in temperature measurement, avoid equipment failures due to excessive temperature, and ensure the stable operation of the power system. In addition, accurate temperature data can also provide a basis for equipment maintenance and overhaul.