2024 年 49 巻 2 号 p. 85-88
Establishing the safety of hydrogen infrastructures and fuel cell systems against the danger of hydrogen leakage will encourage the economics of hydrogen, lowering the cost of related systems, and safe operation of the system will appeal to the public. Hydrogen related facilities may be required to have the ability to detect hydrogen concentrations before a specified concentration of hydrogen or a fraction of flammable limit is reached, in order to allow for single and/or multilevel safety operations. The ISO standard will provide requirements for stationary hydrogen detection apparatus, covering both performance requirements and test methods. In this article, the hydrogen sensors and their applications are reviewed and the details of ISO 26142 “hydrogen detection apparatus” including the scope, history, and current activity of standardization are introduced.