EP0353328A1
Expired / Lapsed
EP
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A polarographic-amperometric three-electrode sensor
Assignee: Draeger Nederland Bv
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Filing: 1988-08-03
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Granted: —
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Expires: 2008-08-03
Abstract
Abstract For a potentiostatically operable, polarographic-amperometric sensor, in particular for biomedical use, wherein a working electrode (5) and a reference electrode (4) are covered by an electrolyte layer (9) which is separated from the medium to be measured by a semipermeable membrane (8), the invention proposes to provide the counter electrode (6) in the form of an external electrode which - for example - can be an outer metal coating surrounding the sensor chip (2) in a three electrode system fabricated as micro-sensor with the integrated technique, and which can be made - for example - of a stainless steel material or of a conductive plastics material.
Inventors
- 👤 Martinus H. Kuypers
- 👤 Gerardus Franciscus Joseph Steeghs
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 19:18
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/14542; A61B5/14532; A61B5/1468; A61B5/1473
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
A potentistatically operable, polarographic-amperometric three-electrode sensor, in particular for biomedical use, wherein a working electrode (5) and a reference electrode (4) are covered by an electrolyte receiving or electrolyte containing layer (9) which is separated from the medium to be measured by a semipermeable membrane (8), characterized in that a counter electrode (6) is an external electrode.
Claim 2
Dependent Claim
57 words
A potentistatically operable, polarographic-amperometric three-electrode sensor, in particular for biomedical use, wherein a working electrode (5) and a reference electrode (4) are covered by an electrolyte receiving or electrolyte containing layer (9) which is separated from the medium to be measured by a semipermeable membrane (8), characterized in that a counter electrode (6) is an external electrode.
Claim 3
Dependent Claim
24 words
The sensor of claim 1, characterized in that said counter electrode (6) is a metal layer at least partly surrounding the sensor body (2).
Claim 4
Dependent Claim
32 words
The sensor of claim 1, characterized in that said counter electrode is a metal element, e.g. a wire, which makes direct contact with the medium to be measured during the measuring operation.
Claim 5
Dependent Claim
32 words
The sensor of claim 1 for biomedical use, characterized in that said counter electrode is a metal electrode to be fixed on the skin of a human being, e.g. a ECG electrode.
Claim 6
Dependent Claim
56 words
The sensor of claim 2, preferably designed for intravasal use as a semiconductor chip, wherein the working electrode (5) and the reference electrode (4) are integrated in the chip surface, characterized in that the counter electrode (6) is a metal coating defining the outside of the sensor and being inert for the field of application desired.
Claim 7
Dependent Claim
20 words
The sensor of any of the preceding claims, characterized in that the counter electrode (6) is made of stainless steel.
Claim 8
Dependent Claim
43 words
The sensor of claim 5, characterized in that the counter electrode is made of Pt, Au, Ag or Ti-containing material or of a metal, preferably used for intravasal applications in the human body or in direct intimate outside contact with the human body.
Claim 9
Dependent Claim
31 words
The sensor of any of the preceding claims 1 to 5, characterized in that the counter electrode (6) is made of an electrically conductive plastics material composition or plastics material mixture.
Claim 10
Dependent Claim
32 words
The sensor of any of the preceding claims, characterized in that it is a transcutaneous, biomedical sensor the externally positioned counter electrode of which is a surface electrode or a ring electrode.
Claim 11
Dependent Claim
55 words
The sensor of any of the preceding claims 1 to 8 for biomedical use, characterized in that it is a rod-shaped or tubular sensor to be injected or inserted into a body cavity and that its outer surface is at least partly formed by an electrically conductive coating for use as a counter electrode (6).
References Cited (Backward Citations)
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