Measurement cell for water vapor sensor

Details Measurement cell for water vapor sensor Measurement cell for water vapor sensor

1994-06-15

1995-09-12

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

356437, 356440, G01N 2161

Patent

active

054499127

ABSTRACT:
An absorption cell of the type used to measure gas concentrations by pressure fluctuations of the concentrated gas in an IR radiation field, wherein the IR radiation through the field is affected by the pressurized gas fluctuations to thereby provide an electrical measurement of gas concentration. The sensitivity, linearity and accuracy of the measured gas concentration is improved by controlling the surface roughness of the interior walls of the measurement cell; the wall roughness is preferably controlled to between 15 and 70 microinches.

REFERENCES:
patent: 3103586 (1963-09-01), Ovrebo
patent: 3174037 (1965-03-01), Demorest et al.
patent: 3902068 (1975-08-01), Wood
patent: 5146283 (1992-09-01), Parnoff et al.

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