Electrochemical sensing cell
AssigneeInterscan Corporation
InventorsManuel Shaw, Imbrie Thatcher
Life of this patent
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Abstract
An electrochemical sensing cell includes a planar sensing electrode clamped between a manifold cap and a cover for a container housing the counterelectrode and electrolyte. In the manifold cap, the gas being analyzed flows through a shallow recess into contact with one side of the sensing electrode. The cover includes an opening across which is supported a porous disc saturated with electrolyte. When the cap is secured to the cover, the disc presses against the other side of the sensing electrode to ensure good electrolyte contact therewith. A vent hole in the cover also permits replenishing of the electrolyte without major disassembly of the cell.
Claims12
An electrochemical sensing cell of the type having a counterelectrode, a sensing electrode and an electrolyte, and used for detecting a gas species in a fluid sample, said cell comprising:
- a rigid manifold cap having a lower surface, a shallow recess in said lower surface, and spaced inlet and outlet ports communicating to said recess for flowing said fluid sample through said recess,
- said sensing electrode being substantially planar,
- a container housing said counterelectrode and said electrolyte, and
- a cover for said container, said cover having an upper surface on which said planar sensing electrode is situated, said cover having an opening through which electrolyte from said container can contact said sensing electrode, said manifold cap being secured to said cover so that said sensing electrode is clamped between said cap and said cover, so that said fluid sample flowing through said recess is in contact with one side of said sensing electrode over the entire area of said recess, and so that said electrolyte is in contact with the other side of said sensing electrode over the entire area of said opening.
Dependencies are inferred from the claim text.