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A typical industrial-grade gas mask for hazardous chemicals and dust
A typical industrial-grade gas mask for hazardous chemicals and dust
A World War I British P Helmet c. 1915
A World War I British P Helmet c. 1915
Zelinsky–Kummant protivogaz, designed in 1915, was one of the first modern-type full-head protection gas masks with a detachable filter and eyelet gla
Zelinsky–Kummant protivogaz, designed in 1915, was one of the first modern-type full-head protection gas masks with a detachable filter and eyelet glasses, shown here worn by U.S. Army soldier (USAWC photo)
Indian muleteers and mule wearing gas masks, France, February 21, 1940
Indian muleteers and mule wearing gas masks, France, February 21, 1940
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Lab worker wearing a powered air-purifying respirator
Lab worker wearing a powered air-purifying respirator
Types of respirators by physical form. Click to enlarge.
Types of respirators by physical form. Click to enlarge.
Workplace protection factor (PF) of filtering facepiece, measured in real time with two optical dust meters. In-facepiece dust concentration is change
Workplace protection factor (PF) of filtering facepiece, measured in real time with two optical dust meters. In-facepiece dust concentration is changed dozens of times in a matter of minutes due to changes of the size of the gaps between the mask and face.
A simple Dräger escape respirator. This model has no hood, and instead comes with noseclips to ensure the wearer breathes only through the filter.
A simple Dräger escape respirator. This model has no hood, and instead comes with noseclips to ensure the wearer breathes only through the filter.