Gas sensor and its method of manufacture

Details Gas sensor and its method of manufacture Gas sensor and its method of manufacture

2006-04-04

2006-04-04

Olsen, Kaj K. (Department: 1753)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C427S296000, C439S091000, C200S264000

Reexamination Certificate

active

07022213

ABSTRACT:
The invention relates to a gas sensor and its method of manufacture.Electrochemical gas sensors usually comprise an external housing, which acts as a reservoir for electrolyte; a wick to keep electrodes wetted with the electrolyte and external electrical terminals, for making electrical contact with the electrodes. Typically a gas permeable/microporous membrane has been used to seal a gas sensor in order to prevent leakage of electrolyte. A problem with existing sensors has been that there was a risk of electrolyte leaking through the membrane around the region where electrical connectors passed therethrough.The present invention overcomes this by providing a method of urging conductive polymer through the membrane under controlled conditions of heat and pressure, thereby ensuring the integrity of the membrane remains in tact while defining an electrically/conductive pathway therethrough.

REFERENCES:
patent: 4132616 (1979-01-01), Tantram et al.
patent: 4322278 (1982-03-01), Cromer
patent: 5173166 (1992-12-01), Tomantschger et al.
patent: 5314605 (1994-05-01), Matthiessen
patent: 5914019 (1999-06-01), Dodgson et al.
patent: WO 99/24826 (1999-05-01), None

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