The Model DX primary method chilled mirror dew/ frost point sensor is a direct insertion hygrometer sensor with an integral PRT temperature sensor, wide operating range and superior temperature stability. The new DX can be inserted into a gas process stream or used to monitor the local environment. With its integrally mounted temperature sensor, a single penetration reduces installation cost and improves relative humidity accuracy as the temperature and dew/frost point are measured at the same location. Active cooling gives the Model DX sensor enhanced stability and a dynamic range of -40°C to +95°C dew/frost point over a wide range of ambient conditions. The Model DX Sensor can be used with the Edgetech Instruments DewMaster and DewTrak II dew/frost point hygrometers. The sensor can be located remotely at distances up to 100 feet.