Carbonic acid gas sensor
First Claim
1. A carbonic acid gas sensor capable of detecting carbonic acid gas dissolved in fluid, comprising:
- an outer plate including first and second glass substrates each having a window formed therein and fixedly sandwiching a gas permeable membrane to form a carbonic acid gas permeable window;
a first supporting plate supporting a pH-electrode, for detecting a pH of an electrolyte, including an insulating substrate, a pH sensitive membrane formed on said substrate so as to oppose said carbonic acid gas permeable window, and a compartment for accommodating the electrolyte, said compartment extending through the thickness of said first supporting plate; and
a second supporting plate supporting a reference electrode, wherein said outer plate, said first supporting plate and said second supporting plate are laminated.
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Abstract
A sensor for detecting a carbonic acid gas dissolved in body fluids has a laminated structure including an outer plate having a carbonic acid gas permeable window, a plate for a pH-electrode having a pH sensitive membrane, an intermediate plate having a cavity for accommodating an electrolyte, and a plate for a reference electrode. The plate for the pH-electrode is constituted in a manner that a pH sensitive membrane constituted by a membrane of an oxide of a platinum group metal is formed on an insulating substrate and the electrolyte contacts with the pH sensitive membrane in a groove. The pH sensitive membrane is disposed so as to oppose to the carbonic acid gas permeable window.
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Citations
12 Claims
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1. A carbonic acid gas sensor capable of detecting carbonic acid gas dissolved in fluid, comprising:
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an outer plate including first and second glass substrates each having a window formed therein and fixedly sandwiching a gas permeable membrane to form a carbonic acid gas permeable window; a first supporting plate supporting a pH-electrode, for detecting a pH of an electrolyte, including an insulating substrate, a pH sensitive membrane formed on said substrate so as to oppose said carbonic acid gas permeable window, and a compartment for accommodating the electrolyte, said compartment extending through the thickness of said first supporting plate; and a second supporting plate supporting a reference electrode, wherein said outer plate, said first supporting plate and said second supporting plate are laminated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification