Respirators with a sacrificial cartridge for end of service life indication
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United States of America Patent
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Jul 14, 2015
Grant Date -
May 2, 2013
app pub date -
Nov 2, 2011
filing date -
Nov 2, 2011
priority date (Note) -
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Abstract
A respirator service life indication system may include a breathing apparatus having an air purifying element; and a service life indicator arranged in a parallel flow configuration with the breathing apparatus. The service life indicator typically might have a sacrificial cartridge, and a sensor disposed downstream of the sacrificial cartridge and configured to detect a contaminant concentration above a predetermined threshold in a gas stream passing through the sacrificial cartridge.
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