Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1984-05-07
1985-07-02
Levy, Stewart J.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
250504R, G01W 100, G01N 2762
Patent
active
045260346
ABSTRACT:
An improved spectroscopic hygrometer includes a krypton-filled source tube that produces emissions at 123.58 nm for selective absorption by water vapor in a gaseous sample. The method for measuring water vapor density requires generation of ultraviolet radiation from a krypton source, receipt of the radiation by a detector, and passage of a gaseous sample through the radiation that is directed to the detector. The krypton radiation has been found to be an effective source for hygrometry purposes, and a practical improvement over prior hydrogen sources.
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patent: 4114088 (1978-09-01), Laws
"The Variable-Path Lyman-alpha Hygrometer and Its Operating Characteristics", by Arden L. Buck, Bulletin of the American Meteorological Society, vol. 57, No. 9, Sep. 1976 at pp. 1113-1118.
"Water Vapor Measurements Utilitzing the Absorption of Vacuum Ultraviolet and Infrared Radiation", by James E. Tillman; published in Principles and Methods of Measuring Humidity in Gases, pp. 428-443, R. E. Ruskin, Editor.
"Humidity Fluctuations Over a Vegetated Surface Measured with a Lyman-alpha Hygrometer and a Fine-Wire Thermocouple Psychorometer", by T. Grayson Redford, Jr., et al. Journal of Applied Meteorology, vol. 19, Jul. 1980, pp. 860-867.
"Lyman-alpha Hygrometer Operator's Manual", published by Campbell Scientific, Inc.
Campbell Gaylon S.
Gauthier Robert V.
Tanner Bertrand D.
Campbell Scientific, Inc.
Levy Stewart J.
Roskos Joseph W.
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