Automatic detector of combustible gases in air - as warning device for personnel in mines, oil refineries, chemical factories, etc

摘要

The gas to be analyzed is employed as the vector (sweeping) gas in a chromatograph adsorption or partition column of which the outlet is wired to register chromatographic negative pears corresp. to distinct constituents and concns. of these constituents. The gas is made suitable for use as a vector gas by eliminating all combustible components by catalytic combustion, leaving only incombustible carrier gas; this obviates the need for supplies of pure, vector gases such as H, N, clean air etc.