Device for creating a reference humidity

Details Device for creating a reference humidity Device for creating a reference humidity

2008-07-08

2008-07-08

Jiang, Chen-Wen (Department: 3744)

Refrigeration

Automatic control

Humidity sensor

C261S128000, C261S135000, C261S156000

Reexamination Certificate

active

11196029

ABSTRACT:
A device for creating a reference humidity that includes a saturation chamber and a condensate cooler in fluid communication with the saturation chamber and arranged downstream of the saturation chamber, wherein the condensate cooler is a fin-type condenser whose arrangement is such that substantially horizontal gas flow through the condensation cooler results. A measuring chamber connected with the condensate cooler, in which a desired reference humidity is definitely set by varying pressures and/or temperatures.

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Hasegawa, S. et al., “The NBS Two-Pressure Humidity Generator, Mark 2,” Journal of Research of the National Bureau of Standards—A. Physics and Chemisty, vol. 81A, No. 1, Jan.-Feb. 1977, pp. 81-88. USA.
Scholz, G., “A Standard Calibrator for Air Hygrometers,” Bulletin OIML, No. 97, Dec. 1984, pp. 18-27. USA.
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Hardy, B., “ITS-90 Formulations for Vapor Pressure, Frostpoint Temperature, Dewpoint Temperature, and Enhancement Factors in the Range −100 to +100C,” Third International Symposium on Humidity and Moisture, 1998, pp. 214-221. USA.

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