When air is cooled, the temp at which condensation takes place is termed the Dew Point (DP). A simple method of determining the DP is to cool the air around a highly polished surface and cooling it. When the DP is reached, condensation on this surface makes it cloudy and the temp observed at this point is the DP. In our Dew Point Measurement System, cooling is done by dry ice ( solid CO2) in a polished tube and temp is measured by a Digital Temp Indicator. This system can be used whenever periodic checking of dew point is required.