GAS CONCENTRATION DETECTOR AND HYDROGEN REFINER

摘要

PROBLEM TO BE SOLVED: To provide a CO concentration detector functioning stably in reformed gas and a hydrogen refiner capable of making a CO cleaning catalyst fulfill its function and rapidly supplying the,reformed gas to a fuel cell on starting. SOLUTION: This detector is provided with a temperature detector provided with a gas supplying part for supplying the gas containing at least hydrogen and carbon monoxide, an oxygen-containing gas supplying part for supplying oxygen containing gas, and a reaction chamber equipped with a catalyst layer in the downstream of the gas supplying part and the oxygen-containing gas supplying part to detect the temperature of the catalyst layer or the gas temperature after passing through the catalyst layer. The concentration of the carbon monoxide is detected by a signal from the temperature detector.