We are offering dew point monitor.appl dew point monitors are a very economical way to monitor the dew point levels in your compressed air system. Standard monitors are available in two dew point ranges. The first is -9 to -40c which is suitable for desiccant dryers. The second range is -12 to +21c which is suitable for compressed air systems using refrigerant air dryers. the appl dew point monitors major benefits over competitive are as follows:- ranges may be displayed in degrees celsius or degrees fahrenheit- sensors can be quickly and easily replaced with no board re-calibration required- sensors are economical normally less than the cost to clean and recalibrate competitive units- sensors are highly accurate, +/-2% r.h., with extremely fast response time- standard dew point monitors have one adjustable set point, and may be supplied with a second independently adjustable set point. Each set point has dryer relay output contacts for operating other devices or alarms. - units are available for 1/60/120v or 24vdc power supplies