North P100 filter. P100 Particulate Filter (99.97% minimum filter efficiency) for all particulates. OSHA's Standard for Respiratory Protection, 29 CFR 1910.134, requires Employers to implement a change schedule for all vapor and gas cartridges when there isn't an end-of-service life indicator on the cartridge. This schedule must be site specific and take into consideration worksite humidity, worker breathing rate as well as contaminant concentrations.
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