Ultraviolet absorption hygrometer

Measuring and testing – Gas analysis – Moisture content or vapor pressure

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250504R, G01W 100

Patent

active

046272844

ABSTRACT:
An ultraviolet absorption hygrometer is provided including a source of pulsed ultraviolet radiation for providing radiation in a first wavelength region where water absorbs significantly and in a second proximate wavelength region where water absorbs weakly. Ultraviolet radiation in the first and second regions which has been transmitted through a sample path of atmosphere is detected. The intensity of the radiation transmitted in each of the first and second regions is compared and from this comparison the amount of water in the sample path is determined.

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patent: 4493114 (1985-01-01), Geller et al.
patent: 4526034 (1985-07-01), Campbell et al.
Tilman; Water Vapor Density Measurements Utilizing the Absorption of Vacuum Ultraviolet and Infrared Radiation.

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