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US 6,607,642 B1Granted
Electrochemical gas sensor with diamond-like carbon electrodes
AssigneeDragerwerk Aktiengesellschaft
InventorsHerbert Kiesele, Frank Mett, Peter Tschuncky
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Abstract
An electrochemical gas sensor (1) is disclosed with a plurality of electrodes (2, 3, 4). The sensor has substantially reduced cross sensitivity with respect to interfering gases. At least the measuring electrode (2) is provided as a thin layer of diamond-like carbon (DLC, diamond-like carbon) on the gas-permeable membrane (9).
Claims20
An electrochemical gas sensor, comprises:
- a gas sensor housing defining a electrolyte chamber;
- a plurality of electrodes arranged in the electrode chamber, said plurality of electrodes including a measuring electrode;
- an electrolyte in the electrolyte chamber;
- and
- a gas-permeable membrane closing said electrolyte chamber, said measuring electrode comprising a thin layer of diamond-like carbon on said gas-permeable membrane;
- a measuring connection connected to said measvring electrode;
- and
- an evaluating circuit including a potentiostat, said evaluating circuit being connected to said measuring connection.
5 more elements
An electrochemical gas sensor, comprising:
- a gas sensor housing defining an electrolyte chamber;
- an electrolyte in the electrolyte chamber;
- a gas-permeable membrane closing said electrolyte chamber to retain the electrolyte in the electrolyte chamber;
- a measuring electrode consisting of a thin layer of diamond-like carbon of a thickness from 50 nm to 1,000 nm on said gas-permeable membrane in said electrolyte chamber;
- a counterelectrode in said electrolyte chamber and positioned spaced from said measuring electrode;
- a reference electrode spaced from said counterelectrode and spaced from said measuring electrode;
- a measuring connection connected to said measuring electrode;
- a counterelectrode measuring connection connected to said counterelectrode;
- a reference electrode measuring connection connected to said reference electrode;
- and
- an evaluating circuit including a potentiostat, said evaluating circuit being connected to each of said measuring connection, said counterelectrode measuring connection and said reference electrode measuring connection.
8 more elements
Dependencies are inferred from the claim text.