| 摘要 |
PROBLEM TO BE SOLVED: To attain high durability against high temperature and prevent a heater from being deteriorated even if combustible gas is detected in a high- temperature range and CO is detected in a low-temperature range by changing the temperature of a gas sensor. SOLUTION: A Pt-Cr, Pt-Fe or Pt-Ti alloy wire is used for a heater/electrode embedded in a bead-shaped metallic oxide semiconductor.
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