Electrochemical oxygen sensor, particularly for analysis of...

Details Electrochemical oxygen sensor, particularly for analysis of... Electrochemical oxygen sensor, particularly for analysis of...

G - Physics

01

N

324/25

G01N 27/30 (2006.01) G01N 27/48 (2006.01)

Patent

CA 1167527

ABSTRACT OF THE DISCLOSURE To provide access of gases to an electrode (39, 48) positioned on a flat plate (35, ) of solid electrolyte material, under controlled conditions, and while preventing access of gases to the electrodes where not desired, the electrodes are covered with a porous cover layer (42, 49) of sintered granular material, for example of zirconium dioxide, having a grain size of 10µm, and 25µm thick, with void or pore- formation material added thereto which, upon sintering, becomes volatile and leaves a porous structure. A gas-tight tunnel covering (44, 51) extends over the electrode and filler covering leaving an open space in those regions where the electrode is exposed to the desired gas, for example a test gas adjacent the sensing end (11/1) of the sensor, or oxygen from ambient air adjacent the connecting or terminal end (11/3) of the sensor, the respective gas to be applied to the electrode diffusing through the pores of the porous structure to the respective electrodes.

376963

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