Detector for carbon monoxide

Abstract

Abstract PURPOSE:To positively detect CO under the device temperature range thereof is relatively low by a device which is composed of a gas sensitive substance containing at least one of Sb2O5 and Nb2O5 of 0.5-10mol% with SnO2 being a main ingredient, and a catalyst layer of Al2O3 bearing Pd thereon. CONSTITUTION:A gas sensitive substance 1-5 has such composition as containing SnO2 as a main ingredient and at least one of Sb2O5 and Nb2O5 of 0.5-10mol% added thereto, and it may be formed as a porous thick film or a thin film produced by sputtering or the like. A catalyst layer consisted of Al2O3 powder bearing Pd thereon is uniformly coated on the substance 1-5. At this time, an amount of Pd is selected to be 0.05-20wt% relative to the entire catalyst layer to make it possible to detect CO gas with still higher sensitivity. Since this CO detecting device is used under device temperature of 10-150 deg.C, it becomes possible to positively detect CO under the device temperature range of relatively low without being influenced by any miscellaneous gas.

Inventors

• 👤 Masayuki Shiratori
• 👤 白鳥　昌之
• 👤 Masaki Katsura
• 👤 桂　正樹
• 👤 Osamu Takigawa
• 👤 修 滝川
• 👤 Hideaki Hiraki
• 👤 英明 平木

Bibliographic Details