| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas sensor capable of detecting the accurate concn. of carbon monoxide even if a zero point is not corrected with respect to measured potential difference. SOLUTION: A gas sensor consists of an insulator 4, a heater film 5, an insulating film 7, a metal film 8, a solid electrolyte film 1, a pair of electrode films 2a, 2b and a catalyst 3. Since the sheetlike metal film 8 having good heat conductivity is provided under the solid electrolyte film 1, heat can be transmitted uniformly and, even if a zero point is not corrected with respect to measured potential difference, the concn. of carbon monoxide can be accurately calculated directly from the potential difference between the electrode films 2a, 2b.
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