EP0047898B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electrochemical sensor to detect reducing gases in air, in particular carbon monoxide, hydrazine and hydrogen
Assignee: Bayer AG
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Filing: 1981-08-28
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Granted: 1986-04-16
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Expires: 2001-08-28
Abstract
No abstract record available.
Inventors
- 👤 Dieter Dr. Kitzelmann
- 👤 Jacques Deprez
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 03:49
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404; G01N27/4045
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
Electrochemical sensor for the measurement of carbon monoxide, hydrogen or hydrazine in ambient air, having a catalytically active measuring electrode (2) exposed to the ambient air and communicating through an aqueous acid electrolyte (3) with a nonpolarisable counter electrode (4), characterised in that the counter electrode (4) is in the form of an air-oxygen electrode, in that the electrolyte (3) consists of an aqueous gelatinous polymeric adhesive in which ionogenic substances are dissolved, and in that the measuring electrode (2) is in-the form of a current-abducting matrix which contains the'catalyst in a finely divided form, so that a three phase boundary of gas-catalyst-electrolyte is formed together with the measuring electrode (2) owing to the adhesive properties of the electrolyte (3).
Claim 2
Dependent Claim
120 words
Electrochemical sensor for the measurement of carbon monoxide, hydrogen or hydrazine in ambient air, having a catalytically active measuring electrode (2) exposed to the ambient air and communicating through an aqueous acid electrolyte (3) with a nonpolarisable counter electrode (4), characterised in that the counter electrode (4) is in the form of an air-oxygen electrode, in that the electrolyte (3) consists of an aqueous gelatinous polymeric adhesive in which ionogenic substances are dissolved, and in that the measuring electrode (2) is in-the form of a current-abducting matrix which contains the'catalyst in a finely divided form, so that a three phase boundary of gas-catalyst-electrolyte is formed together with the measuring electrode (2) owing to the adhesive properties of the electrolyte (3).
Claim 3
Dependent Claim
47 words
Sensor according to Claim 1, characterised in that at least one electrode consists of a close- meshed, electrically conductive grid which is applied to the gel electrolyte by pressure, and a catalyst powder is applied in the gaps and fixed by the adhesive properties of the gel.
Claim 4
Dependent Claim
34 words
Sensor according to Claims 1 and 2, in particular for the measurement of carbon monoxide and hydrogen, characterised in that the electrodes consist of a graphite fleece and the catalyst of finely divided platinum.
Claim 5
Dependent Claim
37 words
Sensor according to Claims 1 and 2, in particular for the measurement of hydrazine, characterised in that the measuring electrode consists of a gold fleece and the counter electrode of a carbon fleece coated with platinum black.
Claim 6
Dependent Claim
18 words
Sensor according to Claims 1 to 4, characterised in that a hygroscopic substance is added to the electrolyte.
References Cited (Backward Citations)
DE2316365A1
Cited
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