Many factors can affect the calibration accuracy of temperature switches. Environmental factors are the first to bear the brunt. The temperature stability of the calibration site is crucial. If the environmental temperature fluctuates violently, it will directly interfere with the accurate judgment of temperature during the calibration process, resulting in large deviations in the calibration results. In addition, the accuracy of the calibration equipment itself cannot be ignored. A low-precision thermostatic bath or an inaccurate standard thermometer will inevitably introduce measurement errors and transmit them to the final calibration data. The technical level and operational standardization of operators are also crucial. In the processes of installing temperature switch, reading data, and adjusting parameters, any slight negligence or non-standard operation may accumulate errors and affect the accuracy of the calibration. Furthermore, the aging degree of the temperature switch will also affect the calibration effect. For a temperature switch after long-term use, the performance of its internal sensitive elements may degrade and its response characteristics may change. Even after calibration, its accuracy maintenance period may be shorter compared with new equipment, and more frequent calibrations are required to ensure reliable operation.