Measuring and testing – Gas analysis – Moisture content or vapor pressure
Reexamination Certificate
2005-03-15
2005-03-15
Garber, Charles D. (Department: 2856)
Measuring and testing
Gas analysis
Moisture content or vapor pressure
C073S029010
Reexamination Certificate
active
06865940
ABSTRACT:
A method of operating an aluminum oxide moisture sensor to measure moisture in a sample gas, where the sensor comprises a pair of electrodes sandwiched about a dielectric, the method comprising: a) heating the sensor to a first temperature above the sample gas temperature and holding the sensor at said first temperature for a first predetermined period of time; b) cooling down the sensor to a second lower temperature over a second predetermined period of time; c) taking plural samples of sensor conductance over a third predetermined period of time at the lower temperature; and d) determining a rate of adsorption of the moisture and using the rate of adsorption as a measure of moisture in the sample gas.
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Garber Charles D.
General Electric Company
Nixon & Vanderhye P.C.
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