Limiting current type oxygen sensor

Details Limiting current type oxygen sensor Limiting current type oxygen sensor

1997-01-24

1998-09-29

Larkin, Daniel S.

Measuring and testing

Gas analysis

Gas of combustion

73 3105, 204426, G01N 2700

Patent

active

058147195

ABSTRACT:
An oxygen sensor of a limiting current type includes a sensing element coated with a porous coating layer having a catalyst supported thereon. The catalyst includes at least one element selected from the group consisting of platinum, rhodium, palladium, iridium and ruthenium, and the content of the catalyst is not more than 50 wt % with respect to the total weight of the porous coating layer, and particles of the catalyst are dispersed within the porous coating layer at spacings of not more than 6 .mu.m. By using the catalyst, the influence of hydrocarbons to the oxygen concentration is reduced.

REFERENCES:
patent: 4574264 (1986-03-01), Takahashi et al.
patent: 4595485 (1986-06-01), Takahashi et al.
patent: 4661234 (1987-04-01), Takahashi et al.
patent: 5443711 (1995-08-01), Kojima et al.
patent: 5480535 (1996-01-01), Kondo et al.
patent: 5538612 (1996-07-01), Kojima et al.

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