COMPENSATION ELEMENT FOR GAS DETECTOR FOR FUEL CELL, THERMAL CONDUCTIVITY TYPE GAS DETECTOR AND GAS UPPLY APPARATUS FOR FUEL CELL

摘要

PROBLEM TO BE SOLVED: To provide a technique for easily monitoring and controlling the composition of the gas to be detected, which is supplied to a fuel cell. SOLUTION: A compensation element for a gas detector for the fuel cell is adapted to a thermal conductivity type gas detector, where the detection element, comprising a first resistor changed in its resistance value by the heat balance with atmospheric gas and a compensation element having a second resistor thermally equivalent to the first resistor hermetically sealed therein under a standard gas atmosphere, is provided to a flow channel through which gas for the fuel cell can flow as gas to be measured so as to come freely into contact with the gas to be measured, and the concentration of the gas to be detected in the gas to be measured is calculated on the basis of the difference between the changes in the resistance values of the detection element and the compensation element. The standard gas in a mixed gas, of which the composition corresponds to the scheduled gas to be measured.