Method and apparatus for sampling the atmosphere in...

Details Method and apparatus for sampling the atmosphere in... Method and apparatus for sampling the atmosphere in...

G - Physics

01

N

73/104

G01N 1/22 (2006.01) G01N 33/00 (2006.01) G01N 1/00 (2006.01) G01N 1/02 (2006.01)

Patent

CA 1045849

A B S T R A C T A method and apparatus for detecting the presence of vapour-producing substances such as explosives contained within an item of baggage, in which the item of baggage is enclosed in a chamber and the air pressure in the chamber is varied cyclically in order to mix at least a portion of the air in the item of baggage with that in the chamber. A vapour detector is then used to detect the presence in the chamber air of vapours given off by an explosive substance or drug (e.g. cannabis) contained within the item of baggage. Drawings. Elect Figure 2 of the drawings. - 18 -

234016

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