GAS DETECTOR FOR MODIFIED FUEL CELL

PROBLEM TO BE SOLVED: To provide a gas detector suitable for a modified fuel cell enhanced in stability and capable of preventing the drift caused by the change with the elapse of time of a gas sensor to the utmost. SOLUTION: The gas detector for the modified fuel cell is equipped with the catalytic combustion type gas sensor 4 constituted by forming a response layer 4b having catalytic action with respect to a combustible gas to a heater 4a also used as a temperature sensor, an operation power feed means 1 for feeding first, second and third voltages V-V3 to the catalytic combustion type gas sensor 4 to raise its temperature to a temperature not responding to hydrogen and the combustible gas a temperature only responding to hydrogen and a temperature responding to hydrogen and the combustible gas, a switching means 3 for outputting the voltages of the operation power feed means 1 at a predetermined cycle and an arithmetic means 6 for operating the concentrations of hydrogen and a hydrocarbon gas on the basis of the output from the catalytic combustion type gas sensor 4 in concidence with the switching operation of the switching means 3. COPYRIGHT: (C)2006,JPO&NCIPI