Plaque for measuring the dose of reactive gases

Details Plaque for measuring the dose of reactive gases Plaque for measuring the dose of reactive gases

1979-09-13

1981-06-02

Smith, William F.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

422 58, 422 57, 116206, 252408, G01N 148, G01N 2106

Patent

active

042711215

ABSTRACT:
Plaques for rapid retrospective recognition of an overdose of noxious gases are of great importance for industrial protection in the chemical industry. These plaques carry an indicator which undergoes a color change on exposure to the gas. Visual assessment of the indicator is considerably facilitated by subdivision of the indicator surface into a plurality of measuring fields with graded sensitivity by means of different covering membranes. Rapid allocation to a given range of dose is possible by separate or combined visual observation of the individual fields of the indicator.

REFERENCES:
patent: 2249867 (1941-07-01), Snelling
patent: 3480402 (1969-11-01), Jackson
patent: 3723064 (1973-03-01), Liotta
patent: 4195056 (1980-03-01), Patel
Jacobs, M. B., The Analytical Chemistry of Industrial Poisons, Hazards, and Solvents, Interscience Publishers, Inc., New York, 1949.

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