特集 「水素をとらえる一水紗センシング技 術の動向一」
接触燃焼式ガスセンサと水素検知 ・ 警報システム
2018 年 43 巻 3 号 p. 130-134
詳細
2018 年 43 巻 3 号 p. 130-134
The hydrogen sensors are important items supporting the hydrogen safety at every phase of hydrogen production, transportation, storage, filling and consumption. A catalytic combustion type gas sensor is mainly used for the gas alarm system of hydrogen stations, and it is recognized as a reliable detection method. However, the further improvement of the sensor is still necessary about power consumption, response time and durability to support safety of the future hydrogen energy society. So, we had developed the catalytic combustion type hydrogen sensor in the shape of the miniature beads. It is using the optimized Pd-Pt/Al2O3 catalyst and the Pt micro-heater coil. Both warm-up time and response time of this sensor achieved less than 1 second by downsizing the element to 200μm diameter. Furthermore, we improved the resistance of sensor poisoning to silicone vapor and confirmed long term stability within ±10% of output error up to 8 years. Therefore, we assume that our sensor technology contributes to hydrogen safety.
