Direct-read colorimetric exposimeter
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United States of America Patent
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Nov 15, 1994
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N/A
app pub date -
Jul 26, 1993
filing date -
Jul 26, 1993
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Abstract
A direct-read exposimeter for providing a visual, graded measurement of color variation corresponding to different ranges of dosage exposure to a polluting gas in the atmosphere over a given time period. The exposimeter includes a color-forming member and at least one gas-diffusion control member within an enclosure formed between a base and a cover. The cover has a number of openings exposed to the atmosphere in alignment with a number of separate diffusion zones formed in the gas-diffusion control member.
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