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G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
G01N7/10—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference
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FR400359D1908-03-051909-03-04
Device for the prevention of damage, particularly explosions and poisonings caused by escaping gases
ExpiredFR400359A
(en)
Device for preventing explosions and poisonings by gas as well as gas leaks from pipes in apartments or closed places, as well as the accumulation of dangerous gases in mines and other similar places