During the measurement, the calibration factor is automatically calibrated to the signal from the sensor. In addition, the Sh T11 has a built-in heating element. When the heating element is turned on, the temperature of SH T11 will be increased by about 5 °C, and the power consumption will be increased. This function is mainly for comparing the temperature and humidity before and after heating, and can synthetically verify the performance of the two sensor components. In the environment of high humidity and 95% RH, the heating sensor has good reaction, which can prevent dew on the sensor, shorten the reaction time and improve the precision. After heating, the temperature of Sh T11 increases and the relative humidity decreases, and the measured value is slightly different from that before heating.