Digital humiditytemperature sensors hyt series ist hyt 939 hyt 939 the specialist for compressed air the welded hermetically sealed to 39 housing with glass grommet and sinter filter is designed for compressed air systems up to 16 bar due to the humidity calibration process and special polynomial correction method a high accuracy 01 rh is achieved specially in the lower humidity region up to 50 ppm water content because of which the sensor is suitable for dew point measurements