Heatless regenerative desiccant dryer is known to provide one of the best dry air available in the market. Operation of the dryer requires huge amount of air. This air is wasted during the purge cycle. With the 3D Prototech Dew Point Monitor, you can connect and control the purge on/off on the dryer based on the dew point of the system, saving you money on the electrical bill and reduce the wear on the compressors.