Electrochemical gas sensor
OwnerWilliam J. Aston, Yat S. Chaninventors
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Abstract
An electrochemical gas sensor comprises sensing and counter electrodes (1,2). A conduit (15) permits access of gas to the sensing electrode (1). An electrolyte reservoir (23). A porous, block-like body (24) is positioned in the reservoir (23) for conveying electrolyte to the sensing and counter electrodes and at least partly supporting other components of the sensor.
Claims15
An electrochemical gas sensor comprising sensing and counter electrodes and at least one separator between said sensing and counter electrodes, means for permitting access of gas to said sensing electrode;
- an electrolyte reservoir;
- and means for conveying electrolyte to said sensing and counter electrodes wherein said conveying means includes a porous, self-supporting body positioned in said reservoir and at least partly supporting said at least one separator.
An electro-catalytic gas electrode including an electrically conductive and electrochemically active porous member whose pores are impregnated with an electrocatalyst, said porous member comprising reticulated vitreous carbon.
An electrode used as a counter electrode or a reference electrode or both for an electrochemical gas sensor including an electrically conductive and electrochemically active porous member whose pores are impregnated with an electrocatalyst, wherein said porous member comprises reticulated vitreous carbon.
A method of assembling an electrochemical gas sensor comprising positioning a porous self-supporting body in a reservoir;
- positioning remaining components of the sensor including at least a separator and a sensing electrode above said porous, self-supporting body wherein said porous, self-supporting body at least partly supports said separator;
- supplying electrolyte to said reservoir;
- assembling and sealing the remaining components together;
- and inverting said sensor to allow electrolyte to wet through to said sensing electrode.
Dependencies are inferred from the claim text.