Patent ID: 8756975

Claim:
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.