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Preliminary Evaluation of a Prototype Organic Vapor Respirator End of Service Life Indicator.

Authors
Kennedy-ER
Source
NIOSH 1980 Feb:20 pages
Link
NIOSHTIC No.
00114082
Abstract
Prototype end of service life indicator devices were evaluated on a respirator cartridge test system. The detector system for the prototype devices was based on a metal oxide combustible gas sensor. The duty cycle in the prototype and the effects of humidity on the sensor could allow exposure of the user to vapor concentrations greater than recommended ones. The author suggests that refinements in battery pack and reduction in sensor power consumption would eliminate the need for a duty cycle and ameliorate sensor stability problems. He recommends that provisions be made so that the sensor remains activated even during charging to help stabilize sensor response. A humidity compensation circuit or the maintenance of a constant humidity environment for the sensor also are recommended.
Keywords
NIOSH-Author; Safety-engineering; Equipment-design; Organic-vapors; Chemical-cartridge-respirators; Personal-protective-equipment; Electrical-equipment; Respiratory-equipment;
Publication Date
19800201
Fiscal Year
1980
NTIS Accession No.
NTIS Price
NIOSH Division
DPSE;
Priority Area
Control Technology and Personal Protective Equipment; Research Tools and Approaches;
Source Name
Division of Physical Sciences and Engineering, NIOSH, Cincinnati, Ohio, 20 pages, 5 references
State
OH;
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