US 6,668,616 B1 · Carbon monoxide sensor

Abstract

A carbon monoxide sensor having a fast response performance without leakage of object gas to an exterior atmosphere is presented. The sensor includes: a proton conductive electrolyte film; two electrodes having catalysts and being disposed at opposite sides of the proton conductive electrolyte film; a positive electrode current collector plate, where a gas passage having a gas inlet and outlet is formed, with the gas passage contacting one of electrodes; a negative electrode current collector plate having plural holes contacting the other of the electrodes; a direct-current power source having positive and negative terminals connected to the positive and negative electrode current collector plates, respectively; and a current detecting unit for detecting a current that varies depending on a concentration of carbon monoxide in an object gas, containing hydrogen, flowing in the gas passage.

Claims34

Dependent claims

A carbon monoxide sensor comprising:

a detector to be disposed in an object gas containing hydrogen, said detector including
(i) a proton conductive electrolyte film having first and second sides,
(ii) a first electrode on said first side of said proton conductive electrolyte film,
(iii) a second electrode on said first electrode,
(iv) a third electrode on said second side of said proton conductive electrolyte film, and
(v) a fourth electrode on said third electrode;
a power source having positive and negative terminals coupled to said first and third electrodes, respectively;
and
a current detecting device for detecting a current that changes in response to concentration of carbon monoxide in the object gas.

6 more elements

Dependencies are inferred from the claim text.

Carbon monoxide sensor

Life of this patent

Carbon monoxide sensor

Life of this patent

Abstract

Claims34