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Self-contained gaseous contaminant dosimeter

  • US 4,269,804 A
  • Filed: 12/03/1979
  • Issued: 05/26/1981
  • Est. Priority Date: 08/24/1979
  • Status: Expired due to Term
First Claim
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1. A personal dosimeter for measuring the average concentration of a gaseous contaminant over a given period of time comprising:

  • a pouch-like receptacle of polymeric material having at least one compartment, the compartment occupying less than the total volume of the receptacle, leaving a reaction chamber, the compartment containing a pre-determined quantity of a color-forming reagent and being adapted to release the reagent into the reaction chamber independently of any other reagents present in any other compartments, and the reaction chamber containing a collecting medium for the gaseous contaminant; and

    a gas diffusion device which is sealed into a boundary of the receptacle and through which the contaminant diffuses at a rate in linear proportion to its concentration in the atmosphere, the diffusion device providing the only communication between the atmosphere and the interior of the reaction chamber.

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