OXYGEN CONCENTRATION SENSOR

摘要

The purpose of the present invention is to provide an oxygen concentration sensor that is capable of easily and accurately measuring oxygen concentration in a high-temperature gas. This oxygen concentration sensor has a double-pipe structure having an outer pipe (201) and an inner pipe (202). The outer pipe (201) comprises: a first section (201A) arranged in a high-temperature environment and comprising a material having low thermal transmission properties; and a second section (201B) positioned outside the high-temperature environment and comprising a material having high thermal transmission properties. A sensor (208) is provided at a location at which gas that has passed through an annular flow path (210) between the outer pipe (201) and the inner pipe (202) flows into the inner pipe (202).