Dew Point Transmitter is calibrated to measure dew point against a chilled mirror reference hygrometer. Our selection of this sensor is simple to install and maintain, and the more calibration points offered over the range, the greater the assurance of accuracy over that range. This device is very easy to install as well as simple to operate. It comes with a sensor exchange program to cut down on maintenance time, and it is trustworthy and economical. This is safe to handle.