United States of America As Represented by the Secretary of the Air Force

Mark Hawkins

Sean W Harshman

A flow regulation device for volatile and semi-volatile sampling onto adsorbent media is provided. The flow regulation device includes a housing having an inlet, an outlet, a secondary inlet that is open to the ambient, a real time flow meter, a controller in electronic communication with the flow meter, and a three-way valve. Gas is drawn through the adsorbent media, into the inlet, and then to the outlet by a vacuum source joined to the outlet. The controller is configured to: (1) actuate the three-way valve to put the vacuum source in-line with the inlet; (2) continuously monitor the flow of gas through the inlet and calculate the time necessary to sample a pre-set volume of gas; and (3) after the pre-set volume of gas passes through the inlet, actuate the three-way valve to put the vacuum source in-line with the secondary inlet.

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Tipp City, OH, United States of America

Mark Hawkins