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CHEMICAL SAMPLING AND MULTI-FUNCTION DETECTION METHODS AND APPARATUS

  • US 20110283776A1
  • Filed: 07/27/2011
  • Published: 11/24/2011
  • Est. Priority Date: 04/18/2006
  • Status: Active Grant
First Claim
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1. A non-contact interrogating apparatus comprising,a) a front sampling region;

  • b) more than one pair of facing air jet ports arranged in a linear array;

    the air jet ports form a sheet-like air flow that releases and/or carries some sample from a targeted surface;

    c) at least some sample is collected at a intake port that is located between the sheet-like impinging air flow; and

    d) a critical angle of the sheet-like air flow, which determines the standoff distance during sampling, such that the sheet-like air flow reaches the targeted surface before passing the midpoint of the pair of facing air jet ports arranged in a linear array, administering the sheet-like air flow and return air flow such that chemicals vapors and/or particles surrounded by the front sampling region, sheet-like air flows, and the targeted surface are suctioned with a return air flow into the intake port.

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