Dew Point Sensor Model ATS 301D Dew points indicate the amount moisture in the air. The higher the dew points, the higher the moisture content of the air at a given temperature. Dew point temperature is defined as the temperature to which the air would have to cool (at constant pressure and constant water vapor content) in order to reach saturation. A state of saturation exists when the air is holding the maximum amount of water vapor possible at the existing temperature and pressure. Specifications: Range : -60 to 30 Deg C Principle: Thin Film Capacitive Range: Degree C, PPM & % RH Resolution: 0.1 Unit or 1 Unit (Application based) Sampling Method: Direct Plug In Display: 128 X 64 Graphics LCD Power Source: Built in Lithium Rechargeable battery Accuracy: /2% Response Time: <5 Second Data Storage: 5000 or 10000 Computer Interface: RS 232, USB Sensor Life: 2-3 Years