Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1997-03-07
1998-12-01
Brock, Michael
Measuring and testing
Gas analysis
Moisture content or vapor pressure
7333502, 324570, 324689, 236 44E, 340602, G01W 100, B01F 302, G01N 2556
Patent
active
058441387
ABSTRACT:
A humidity sensing device comprises a sensor unit including a humidity sensitive capacitor having a capacitance which changes as a function of relative humidity, an oscillator circuit including the humidity sensitive capacitor wherein the output frequency of the oscillator circuit is a function of capacitance, and a sensor memory unit having stored calibration data for said humidity sensitive capacitor. A data processing unit is coupled to the sensor unit and includes a data processing circuit coupled to an output of said oscillator circuit, wherein said data processing circuit provides an output indicative of relative humidity as modified by the calibration data received by and stored in another memory unit as associated with such data processing circuit.
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Brock Michael
Veris Industries, Inc.
Wiggins J. David
LandOfFree
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