| 摘要 |
PURPOSE: To provide a contact-burning type gas sensor by which the concentration of a low-concentration combustible gas in a gas including incombustible gas elements such as carbon dioxide, etc., can be measured accurately. CONSTITUTION: A contact-burning type gas sensor is provided with a detection element and a comparison element, and the detection element is formed by arranging aγ-alumina depositing a catalyst around a metallic wire, while the comparison element is formed by arranging anα-alumina around the metallic wire. When assuming that the mass of theγ-alumina is the detection element is 100, that of theα-alumina in the comparison element is more than 70 and less than 130.
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