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HUMIDITY SENSOR

  • US 20110308313A1
  • Filed: 06/01/2011
  • Published: 12/22/2011
  • Est. Priority Date: 06/17/2010
  • Status: Abandoned Application
First Claim
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1. A humidity sensor comprising:

  • a pair of electrodes spaced adjacent each other and defining an air gap therebetween such that the electrodes provide a capacitor with air as dielectric material; and

    ,circuitry for sensing capacitance connected to the electrodes such that changes in permittivity of the air in the air gap caused by changes in humidity, cause changes in capacitance;

    wherein,the circuitry generates a signal indicative of humidity in the air in response to sensed capacitance of the electrodes.

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