Respirator cartridge end-of-service life indicator

Details Respirator cartridge end-of-service life indicator Respirator cartridge end-of-service life indicator

A - Human Necessities

62

B

340/143, 340/156

A62B 7/00 (2006.01) G01N 27/16 (2006.01) G08B 17/10 (2006.01) H01C 13/00 (2006.01)

Patent

CA 1133607

ABSTRACT OF THE DISCLOSURE A gas or vapor sensing and alarm device in an air purifying respirator for warning the wearer of hazardous levels of gases or vapors penetrating through the respirator cartridge. An exothermic sensor which can be fitted in the cartridge adaptor or facepiece cavity of the respirator monitors the heat evolved during adsorption of the vapor or gas into the sensor's absorbent and triggers an alarm when the respirator cartridge has reached the end of its service life.

307200

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