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Chemical vapor sensor having an active and a passive measurement mode

  • US 20060153740A1
  • Filed: 01/12/2005
  • Published: 07/13/2006
  • Est. Priority Date: 01/12/2005
  • Status: Active Grant
First Claim
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1. A chemical vapor sensor comprising:

  • an infrared source for generating infrared waves;

    an infrared detector for measuring the intensity of the infrared waves generated from the infrared source;

    a vapor concentrator including a vapor adsorber and a heating source to heat the vapor adsorber, for concentrating vapor from a sample volume of air, wherein the concentrated vapor is passed into a path of the infrared waves;

    a first sampling intake portion for passively acquiring the sample volume of air and passing the sample volume of air to the vapor concentrator; and

    a second sampling intake portion for actively acquiring a sample volume of unmixed gas and passing the sample volume of unmixed gas into a path of the infrared waves.

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