Hydrogen detector

Details Hydrogen detector Hydrogen detector

1981-04-01

1982-04-13

Serwin, Ronald

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

324 71SN, 338 34, 422 95, G01N 2740, G01N 2712, G01N 3106

Patent

active

043247610

ABSTRACT:
A hydrogen detector comprised of a substrate supporting an electrically conducting base metal film, an upper electrically conducting duffusion barrier metal film, a polycrystalline film of titanium dioxide sandwiched between the base and diffusion barrier films, said polycrystalline titanium dioxide film electrically insulating the base film from said diffusion barrier film, the base film being in electrical contact with the titanium dioxide film, an insulating layer electrically insulating said titanium dioxide film from said diffusion barrier film except for a predetermined surface portion thereof in electrical contact with said diffusion barrier film, said predetermined electrically contacting portion being at least sufficiently large to produce a measurable electrical conductance, an electrically conducting or non-conducting catalytic top film of metal able to dissociate hydrogen into its atomic form in electrical contact with said diffusion barrier film and at least substantially coextensive with said barrier film throughout said predetermined electrically contacting portion, said top film when it is electrically conducting or said diffusion barrier film and said base film being connected to an external circuit to measure conductance, the electrical conductance of said hydrogen detector varying with the concentration of hydrogen in the atmosphere surrounding it.

REFERENCES:
patent: 3479257 (1969-11-01), Shaver
patent: 3999947 (1976-12-01), Mihara
patent: 4058368 (1977-11-01), Svensson et al.
Yamamoto et al., "Surface Science," vol. 92, (Feb. 11, 1980), pp. 400-406.

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