The present situation and some subjects of the hydrogen gas sensor

Abstract

The hydrogen gas sensor has been playing an important role in the safety of various industries, which utilize high pressure hydrogen gas. But now, the better efficiency of hydrogen sensor is strongly hoped for the future “Hydrogen Society”. In this paper, hydrogen sensors which are actually used in various industries are described, namely the catalytic combustion, the hot-wire semiconductor and the thermal conductivity type. Furthermore, the new type hydrogen sensors, the solid-electrolyte, metal oxide semiconductor and other types, are also explained.