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Image: Protection Factors of filtering facepiece, measured in real time during work

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Description: Workplace protection factors of negative pressure half-mask respirator (filtering facepiece), measured in real time during work (harvesting using combine). The counting concentrations of dust particles under the mask and the outside (in the breathing zone) was measured with two optical dust meters for the different particle size ranges separately. A source (The Annals of Occupational Hygiene (2005) Vol. 49(3) pp. 245-257)
Title: Protection Factors of filtering facepiece, measured in real time during work
Credit: Own work
Author: AlexChirkin
Usage Terms: Creative Commons Zero, Public Domain Dedication
License: CC0
License Link: http://creativecommons.org/publicdomain/zero/1.0/deed.en
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