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Application Note Dew-point Calculation

SHTxx Humidity & Temperature Sensmitter Application Note Dew-point Calculation 1 Introduction The Dew-point temperature can easily be calculated from the relative humidity and temperature. 2 Theory Definition of dew point: The Dew-point temperature is the temperature to which the air must be cooled to reach saturation (assuming air pressure remains the same). When the temperature cools to the dew point, fog or dew can occur, and the relative humidity becomes 100%. Calculation of the dew point: The Magnus formula [Sonntag90] relates the saturation vapour pressure and dew point. At a temperature T (in C), the saturation vapour pressure EW (in hPa) over liquid water, is T.

Nov 18, 2001 · Dew-point Calculation 1 Introduction The dew-point temperature can easily be calculated from the relative humidity and temperature. 2 Theory Definition of dew point: The dew-point temperature is the temperature to which the air must be cooled to reach saturation (assuming air pressure remains the same).

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