Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1985-11-04
1987-03-17
Kreitman, Stephen A.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
733365, 338 35, G01N 2714
Patent
active
046497366
ABSTRACT:
A moisture monitoring system for continuous flow gas lines, the system having an electrical heater with a salt impregnated sleeve thereabout, with noble metal contacts positioned on the sleeve excited by the AC output of a solid state oscillator and varying in resistance according to water vapor concentration in the gas surrounding the element, with a direct current control signal derived from the AC current to control the direct current to the heating element. A temperature responsive resistor in thermal relation with the heater provides an indication of the moisture content.
REFERENCES:
patent: 2494628 (1950-01-01), Oberding
patent: 2629253 (1953-02-01), Deaton
patent: 2733607 (1956-02-01), Miller
patent: 3516282 (1970-06-01), Leach et al.
patent: 3857284 (1974-12-01), Carron et al.
patent: 4041437 (1977-08-01), Matsuura et al.
patent: 4379406 (1983-04-01), Bennewitz et al.
patent: 4419988 (1983-12-01), Kitamura et al.
ITT Corporation
Kreitman Stephen A.
Peterson T. L.
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