Pressure Activated Sampling System
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United States of America Patent
Stats
-
N/A
Issued Date -
Nov 1, 2012
app pub date -
Mar 26, 2007
filing date -
Dec 11, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Screening of items for the presence of contaminants, such as explosives residue, is accomplished by subjecting an item loaded into a pressure chamber to a pressure substantially in excess of atmospheric pressure conditions and rapidly decompressing the item to the ambient atmospheric pressure. The rapid decompression serves to scavenge vapors and particles from the exterior and interior of the item and any objects it contains. A sample of the vapors and particles removed from the item by the rapid decompression is sampled and is tested to determine whether a predetermined contaminant is present in the sample. Depending on the types of contaminants for which the sample is tested, it is possible to detect whether explosives, biological or chemical agents, and/or narcotics residues are present on or in the item being screened.
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