Method to measure relative humidity of a volume of air...

Details Method to measure relative humidity of a volume of air... Method to measure relative humidity of a volume of air...

G - Physics

01

N

G01N 25/56 (2006.01) G01N 7/00 (2006.01) B27L 5/00 (2006.01)

Patent

CA 2443197

A method for determining the relative humidity of a volume V of air having a temperature of 100°C or greater. The method comprises the steps of measuring the temperature T V of the volume of air and determining from that temperature the saturation vapor pressure P sat(V) of the volume of air; collecting from the volume of air a sample volume S of air and cooling it to a temperature T S below 100°C, but above the dew point of the sample volume of air; determining from the temperature T S the saturation vapor pressure P sat(S) of the cooled sample volume of air; determining the relative humidity RH S of the sample volume of air from T S and from the wet bulb temperature of the sample of air; and perform- ing the calculation RH V = RH S X P sat(S)~P sat(V) to obtain a relative humidity RH V of the volume of air.

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