what causes a dew point alarm
High Dew Point Indicator part number 46-2064. The Van Air Systems High Dew Point Indicator produces an alarm signal when a dew point rises above approximately 0ÂºF. A sample of compressed air is passed over a sensor within a sample cell.The resistance of the sensor varies in inverse proportion to the relative humidity to which it is exposed.igh Dew Point Indicator part number 46-2064. The Van Air Systems High Dew Point Indicator produces an alarm signal when a dew point rises above approximately 0ÂºF. A sample of compressed air is passed over a sensor within a sample cell.