Abstract: The role and significance of the current dew-point sensor response time characteristic measurement in the field of system testing of large equipment in China is discussed,the current research status of calibration of gas dew point temperature response time measurement in China is introduced,and a gas dew point temperature response time measurement system is designed.The system has the advantages of high measurement accuracy,wide range of step control and convenient operation,which provides technical support for solving the difficult problem of high precision measurement of gas dew point temperature response time.The device is used to test the response time characteristics of quartz resonant dew point sensor and alumina dew point sensor respectively.The research results provide guidance for the future research and improvement of the response time characteristics of humidity sensor elements.

Key words: Dew point temperature, Response time, Measurement, Calibration