| At present, the maximum upper limit of dew point temperature traceability in China's humidity measurement is 80℃. In order to meet the demand of humidity parameter traceability at higher dew point temperature, a high dew point humidity standard device set based on the principle of double temperature and double pressure method is developed. The device consists of the constant temperature system, pre-saturation system, saturation system, measuring chamber and temperature, pressure measurement and control system. It can produce the dew point temperature of 80~150℃, the corresponding measuring temperature range is 80~200℃, the absolute pressure range is 0~1MPa, and the expanded uncertainty is 0.34~0.80 ℃ (k=2). The device has good accuracy, convenience to operate and important technical application value. |
