GAS CONCENTRATION MEASURING APPARATUS

摘要

PROBLEM TO BE SOLVED: To suppress deterioration of measurement accuracy of hydrogen concentration in a gas concentration measuring apparatus which measures the hydrogen concentration.

SOLUTION: The gas concentration measuring apparatus measures gas concentration of hydrogen contained in fuel gas, and includes: a temperature compensation resistor 44 which functions as a temperature detection part which detects temperature of the fuel gas; a heating resistor 43 which functions as a heat generation part which is energized to generate heat; a control circuit 51 for measurement which controls an energization amount to the heating resistor 43 so that the temperature of the heating resistor 43 becomes higher than that of the temperature compensation resistor 44 by fixed degrees; a storage part 41 the inside of which a storage chamber 41a which stores each of the temperature compensation resistor 44 and the heating resistor 43 is formed; and a pore part 41b which guides the fuel gas flowing in a hydrogen flow channel 104a to the storage chamber 41a. A flow channel cross section of the pore part 41b is smaller than that of the hydrogen flow channel 104a and that of the storage chamber 41a.

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