Combustible gas detectors

Details Combustible gas detectors Combustible gas detectors

1978-08-24

1981-01-20

Serwin, R. E.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

23232E, 422 88, 422 96, 338 34, G01N 2530, G01N 2716

Patent

active

042462282

ABSTRACT:
The invention relates to combustible gas detectors of the kink in which a heatable wire filament exhibits a change in resistance due to a change in its temperature caused by the oxidation of a combustible gas passing over it. In order to avoid poisoning the heatable wire filament is embedded in a pellet consisting of a homogeneous mixture of an oxidation catalyst material and zeolite material the latter preferbly of type X, Y, L or mordenite of large pore size. Additionally layers of catalytically active material and/or inactive non-catalytic porous material may be provided around the outside of the pellet.

REFERENCES:
patent: 3092799 (1963-06-01), Baker
patent: 3564474 (1971-02-01), Firth et al.
patent: 3625756 (1971-12-01), Taguchi
patent: 4111658 (1978-09-01), Firth et al.

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