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Chilled Mirror Dew Point Method. ASTM D 6836-02 describes five methods methods AE for measurement of soilwater characteristic curve SWCC. Usually the mirror surface and its accessories are installed in the measurement chamber through which the gas flows and the dew point of the gas is determined by measuring the temperature of the mirror surface when the. When a certain volume of gas is cooled uniformly under a constant pressure the partial pressure of the gas and the moisture in the gas remains unchanged until the moisture in the gas reaches a saturated state and the temperature in this state is the dew point of the gas. Chilled mirror technology can offer the highest accuracy over a wide range of dew points.
045 to 100 RH Accuracy of 027F Single two stage and harsh environment sensor options Dual 4-20mA outputs. Ovens dryers furnaces etc. Roa and Tapia de Daza 1991. When a certain volume of gas is cooled uniformly under a constant pressure the partial pressure of the gas and the moisture in the gas remains unchanged until the moisture in the gas reaches a saturated state and the temperature in this state is the dew point of the gas. The chilled mirror dew-point meter measures the dew-point directly. The optical chilled mirror hygrometer which provides a fundamental primary measurement of dew point and the capacitive polymer sensor which provides a non-fundamental secondary measurement of Relative Humidity.
Dew-point instruments are accurate fast simple to use and precise Richard and Labuza 1990.
Snavely et al 1990. The DewTrace is a high precision bench top laboratory standard dewfrost point hygrometer capable of measuring very low frost points using the primary method chilled mirror measurement technique. Dew points above ambient can be measured by heating the chilled mirror and associated components. Snavely et al 1990. In terms of dew point the equivalent accuracy is 0175C. Michells Chilled Mirror Dew Point Meters are precision instruments for critical measurement and control applications.