Electrochemical cell
AssigneeSprue Safety Products Ltd.
InventorsMario Zanon, Ian Robins
Life of this patent
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Abstract
An electrochemical cell for detecting a gas from the surrounding environment. The cell comprises an electrolyte and a sensing electrode which is in fluid communication with the electrolyte and the gas to be detected, when present. The cell further comprises a counter electrode in fluid communication with said electrolyte, and also a source of reactant gas provided in a cavity adjacent to the counter electrode, wherein reaction of the gas to be detected at the sensing electrode results in reaction of the reactant gas at the counter electrode and wherein the cavity is formed of or comprises a membrane. The cell may also have a wick extending between the sensing electrode and the counter electrode in an axial direction and a reservoir surrounding the wick.
Claims19
An electrochemical cell for detecting a gas from a surrounding environment, the cell comprising:
- an electrolyte;
- a sensing electrode in fluid communication with said electrolyte and said gas to be detected, when present;
- a counter electrode in fluid communication with said electrolyte;
- a source of reactant gas provided in a cavity adjacent to the counter electrode, wherein reaction of said gas to be detected at the sensing electrode results in reaction of the reactant gas at the counter electrode,
- wherein the cavity is formed of or comprises a gas permeable or gas semi-permeable membrane configured for replenishment of the reactant gas with gas from the electrolyte through the gas permeable or gas semi-permeable membrane, and
- wherein the cavity is sealed from the gas from the surrounding environment.
An electrochemical cell for detecting a gas, comprising:
- a reservoir containing an electrolyte;
- a sensing electrode in fluid communication with said electrolyte and said gas to be detected, when present;
- a counter electrode in fluid communication with said electrolyte;
- a cavity adjacent to the counter electrode, wherein the cavity is formed of or comprises a gas permeable or gas semi-permeable membrane configured for replenishment of a reactant gas with gas from the electrolyte through the gas permeable or gas semi-permeable membrane;
- and
- a wick extending between the sensing electrode and the counter electrode in an axial direction to provide a communication path for the electrolyte therebetween,
- wherein the reservoir surrounds the wick.
An electrochemical cell for detecting a gas from a surrounding environment, the cell comprising:
- an electrolyte;
- a sensing electrode in fluid communication with said electrolyte and a said gas to be detected, when present;
- a counter electrode in fluid communication with said electrolyte;
- and
- a source of reactant gas provided in a cavity adjacent to the counter electrode, wherein reaction of said gas to be detected at the sensing electrode results in reaction of the reactant gas at the counter electrode;
- and wherein the cavity is formed of or comprises a gas permeable or semi-permeable membrane configured for replenishment of the reactant gas with only gas from the electrolyte through the gas permeable or semi-permeable membrane.
Dependencies are inferred from the claim text.