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US 2017/0248544 A1Published application
Auxiliary micro-electrodes for diagnostics of electrochemical gas sensors
AssigneeLife Safety Distribution AG
InventorsKeith Francis Edwin Pratt, Martin G. Jones, John Chapples, Lei Xiao
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Abstract
A gas sensor includes know types of electrodes such has sensing electrodes, counter electrodes or reference electrodes to sense the presence of a predetermined gas. In addition, at least one diagnostic electrode is carried in the sensor. The diagnostic electrode implements at least one diagnostic function without substantially impairing the gas sensing function. The diagnostic electrode is immersed in sensor electrolyte.
Claims20
A sensor comprises:
- a housing comprising an internal sensing cavity;
- a liquid electrolyte;
- a plurality of electrodes arranged within the housing, wherein the plurality of electrodes comprise at least one sensing electrode, a reference electrode, and a counter electrode;
- and
- at least one microelectrode positioned within the housing of the sensor, wherein the microelectrode comprises a surface area that is at least one order of magnitude smaller than a surface area of the sensing electrode.
2 more elements
A sensor comprising:
- a housing;
- a sensor carried by the housing, the sensor including at least a sensing electrode, a counter electrode, an electrolyte, and at least one diagnostic electrode immersed in the electrolyte, wherein the diagnostic electrode has a first exposed area and the sensing electrode has a second exposed area, and wherein the second exposed area is at least an order of magnitude greater than the first exposed area;
- and
- control circuits carried, at least in part in the housing, wherein the control circuits are coupled to the electrodes of the sensor, and wherein the control circuits are configured to:
- operate the diagnostic electrode, at least intermittently[[]] while the sensing electrode is functioning to sense a target component, and
- carry out a diagnostic function.
3 more elements
Dependencies are inferred from the claim text.