Colorimetric gas dosimeter

Details Colorimetric gas dosimeter Colorimetric gas dosimeter

1983-09-16

1984-10-23

Marcus, Michael

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

422 58, 422 60, 422 86, 436902, G01N 2178, G01N 3122

Patent

active

044787928

ABSTRACT:
A gas dosimeter comprises a stack of porous sheets, impregnated with a reagent that changes color on contact with the gas to be determined, contained in a housing which has an opening to expose one end of the stack to the atmosphere to be tested. The gas to be determined penetrates by diffusion the layers of porous sheets, causing the sheets in the stack to change color sequentially from the end of the stack exposed to the atmosphere. The degree of penetration through the layers of porous sheets is a function of dosage exposure. The housing may be transparent with each superposed sheet in the stack being larger than the adjacent underlying sheet, so that each sheet is visible through the housing endwall.

REFERENCES:
patent: 3723064 (1973-03-01), Liotta
patent: 3847552 (1974-11-01), Hobgood et al.
patent: 4076502 (1978-02-01), Dugle et al.
patent: 4256694 (1981-03-01), McAllister et al.
patent: 4271121 (1981-06-01), Diller et al.

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