Uploaded January 2024 | Updated September 2026, 1 week ago

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Patented in 1921 and manufactured by the Mine Safety Appliances Company of Pittsburgh, the All-Service Gas Mask Type N was a “universal type” air-purifying mask intended for use by Miners, Firefighters, and other personnel working in contaminated environments. It was capable of filtering out a wide variety of atmospheric contaminants, including Carbon Monoxide, Hydrogen Sulphide, Ammonia, organic vapours, and smoke.

Thank you to Julian Horn for his invaluable assistance with creating this video.

0:00 Introduction
0:54 A Brief History of MSA Safety
3:00 Storage Box and Contaminant Ratings
6:09 Mask Features
7:25 Mask Timer / Breath Counter
8:33 Filter Canister Composition and Chemistry
13:15 Outro

SOURCES:
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