Air compression increases water vapor pressure and thus dew point. Pressure dew point refers to the temperature of gases corresponding to the moisture contained in it for a pressure that exceeds the normal atmospheric pressure level. This increased pressure level is usually associated with an air compression system and is relevant to operators seeking to protect sensitive equipment from the damaging effects of accumulated moisture. the value of the compressed air temperature corresponding to the moisture contained in it for a given pressure.
It is important to take this into consideration if you are bleeding the air to atmosphere before taking a measurement. The dew point at the measurement point will be different from the dew point in the process.
