Respirators, also known as respiratory protective equipment or respiratory protective devices, are used in some workplaces to protect workers from air contaminants. Initially, respirator effectiveness
Example of measurement of efficiency of the respirator (in the workplace). Description: (1) personal sampling pump, (2) the cassette and the filter for determining the concentration (in the breathing zone), (3) the sampling line (from the breathing zone), (4) the cassette and the filter to determine the concentration (under a mask), and (5) the sampling line (from the mask).
Protection factors (PFs) of powered air-purifying respirators (PAPRs) with loose-fitting facepiece (hood or helmet). These data led to the assigned PF being lowered from 1000 to 25 PEL (USA), and from 1000 to 40 OEL (UK)
The Lepestok filtering half-mask, viewed from the inner side of the semi-finished product. The effectiveness of this filtering facepiece was overestimated by orders of magnitude. For the period 1956 to 2015, over 6 billion respirators were produced.[citation needed]
The central detail of the Liquidators' medal, with traces of alpha (α) and beta (β) particles and gamma (γ) rays over a drop of blood.
A respirator is type of mask designed to protect the wearer from inhaling hazardous atmospheres including lead fumes, vapors, gases and particulate matter such as dusts and airborne pathogens such as
Workplace respirator testing
…Respirators, also known as respiratory protective equipment (RPE) or respiratory protective devices (RPD), are used in some workplaces to protect workers from air…
White, disposable cup N95 filtering facepiece respirator
The Hawks Nest Tunnel disaster memorial grave site
Types of respirators by physical form.