SENSOR FOR SENSING HYDROGEN IN LIQUID AND GASEOUS MEDIA

摘要

A sensor for sensing hydrogen in liquid and gaseous media comprises a selective membrane and a housing, a ceramic sensor element, a reference electrode, a porous platinum electrode, a sealed inlet and a potential measuring device. The ceramic sensor element is configured in the form of a cylinder with a bottom. The outer cylindrical surface of the ceramic sensor element is hermetically connected to the inner side surface of the housing. The reference electrode is situated inside an inner cavity of the ceramic sensor element. The outer part of the bottom of the ceramic sensor element is coated with a porous platinum electrode layer. The end of the central core of the potential measuring device extends into the body of the reference electrode. A lower bushing is provided in the form of a tube, which is connected to the lower part of the housing. To the lower end of said bushing there is attached a selective membrane, the free end of which is hermetically sealed with a plug, wherein a cavity delimited by the inner surface of the lower bushing, the outer part of the bottom of the ceramic sensor element and the inner surfaces of the selective membrane and the plug is hermetic. An upper bushing is mounted at the top of the potential measuring device, and an annular cavity between the inner surface of the wall of the upper bushing and the outer surface of the potential measuring device is filled with a glass ceramic.