HYDROGEN CONCENTRATION METER

摘要

Provided is a hydrogen concentration meter which can measure the concentration of hydrogen in a gas to be monitored even in a place having a high radiation quantity, does not require any driving power supply for driving the hydrogen concentration meter, and can measure the concentration of hydrogen in a gas to be monitored even when the environment surrounding the hydrogen concentration meter has a high temperature. The hydrogen concentration meter (100) according to the invention of the present application can measure the concentration of hydrogen in a gas. The hydrogen concentration meter (100) comprises: a first electrode (1) which is made from a first metal; and a second electrode (2) which is made from a second metal having a different work function from that of the first metal and is arranged so as to face the first electrode (1). The hydrogen concentration meter (100) is characterized in that the first electrode (1) or the second electrode (2) is an electrode capable of detecting charged particles that are generated between the first electrode (1) and the second electrode (2) by the action of recoil protons generated upon the irradiation with neutrons.