Methods and apparatus for detecting exposure to hazardous substances
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United States of America Patent
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Oct 25, 2011
Grant Date -
Oct 11, 2007
app pub date -
Sep 14, 2005
filing date -
Sep 22, 2004
priority date (Note) -
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Abstract
An apparatus for detecting exposure to at least one hazardous substance is provided. The apparatus includes a body having a plurality of openings, and an attachment mechanism coupled to the body. Each opening is sized to receive a cassette for detecting the presence or absence of at least one hazardous substance. The cassette can include a colorimetric sensor having a base layer fabricated from a hydrophobic film, a colorimetric coating for covering the hydrophobic film, and at least one hydrophobic membrane for controlling the exposure of the specific substance to the colorimetric coating.
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