DETECTION OF GASEOUS CARBON MONOXIDE AND SENSOR USED THEREFOR AS WELL AS DETECTION OF CARBON MONOXIDE AND GASEOUS METHANE AND SENSOR USED THEREFOR

摘要

PURPOSE:To shorten the time required for one time of heat cycle by using a sensor constituted by fixing a thin sheet-like gas sensitive body to a base material and forming a notch for limiting heat conduction to the base material. CONSTITUTION:The gas sensitive body 5 consisting of a tin oxide semiconductor is put alternately into a low-temp. state and high-temp. state by repetition of heating and cooling and gaseous carbon monoxide is detected by the gas sensitive body 5 in the low-temp. state. The stain on the surface of the sensitive body 5 is removed in the high-temp. state. The sensor constituted by fixing the thin sheet-like sensitive body 5 to the base material 1 and forming the notch 7 for limiting the heat conduction between the base material 1 and the sensitive body 5 to the base material 1 is used. The time required for heating and cooling of the sensitive body 5 is then greatly shortened. The time required for one time of the heat cycle is thereby shortened.