An oxygen sensor and a method utilising it

G - Physics – 01 – N

Patent

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G01N 27/407 (2006.01)

Patent

CA 2577004

Use of an oxygen sensor comprising a membrane, preferably in the form of a first tube (2), which is substantially made of zirconium dioxide and has an internal and an external coating (3, 4) of an electrically conductive, catalytic layer. On the electrically conductive, catalytic layer, a porous, preferably ceramic layer (5) is provided. The porous layer (5) is provided on the electrically conductive, catalytic layer (3), which is located at least partially within a second tube (6), made of a gas tight material. The oxygen sensor, which is part of a clamped together structure with O-rings, may be used in a method, in which the measuring gas, especially a reactive measuring gas, is supplied to the external side of the first tube (2).

Cette invention concerne un capteur d'oxygène, qui comprend une membrane, de préférence sous la forme d'un premier tube (2), constitué essentiellement de dioxyde de zirconium et possédant un revêtement externe et interne (3, 4) composé d'une couche catalytique électroconductrice. Sur cette couche catalytique électroconductrice est disposée une couche poreuse de préférence en céramique (5). Cette couche poreuse (5) est disposée sur la couche catalytique électroconductrice (3), située sur le côté externe du premier tube (2). Le premier tube est placé au moins partiellement dans un second tube (6), constitué par un matériau étanche aux gaz. Ce capteur d'oxygène, qui peut faire partie d'une structure assemblée avec joints toriques, peut être utilisé dans un procédé dans lequel le gaz de mesure, notamment un gaz de mesure réactif, est amené sur le côté externe du premier tube (2).

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