HYDROGEN SENSOR IN LIQUID AND GAS MEDIA Russian patent published in 2016 - IPC G01N27/417 

FIELD: measurement equipment.

SUBSTANCE: hydrogen sensor in liquid and gas media includes a selective membrane and a body, inside of which there is a potential measuring device, a ceramic sensitive element from solid electrolyte, in the cavity of which there is a reference electrode, a porous platinum electrode applied onto the external surface of the ceramic sensitive element, a cable gland, arranged tightly inside the body above the ceramic sensitive element, the potential measuring device passing via the central hole of the cable gland, and a lower bushing. The ceramic sensitive element is made in the form of coupled cylindrical element and bottom, located in the lower part of the cylindrical element. The outer cylindrical surface of the ceramic sensitive element is tightly connected with the inner side surface of the body. The reference electrode is arranged in the inner cavity of the ceramic sensitive element. The outer part of the bottom of the ceramic sensitive element is coated by a layer of the porous platinum electrode. The end of the central strand of the potential measuring device is taken out into the volume of the reference electrode. The lower bushing made in the form of a tube connected to a lower part of the body at the side of the ceramic sensitive element. The lower end of the lower bushing has a bottom with a central hole, to which the selective membrane is attached. The lower free end of the selective membrane is tightly closed with a plug, and the cavity limited by the inner surface of the lower bushing, the outer part of the bottom of the ceramic sensitive element and inner surfaces of the selective membrane and the plug is made tight. On top of the potential measuring device there is an upper bushing installed, at the same time the annular cavity between the inner surface of the upper bushing wall and the outer surface of the potential measuring device is filled with glass ceramic.

EFFECT: increased resource and reliability of operation of a hydrogen sensor in a wide range of working medium parameters, by means of provision of tightness of an inner cavity of a ceramic sensitive element.

3 cl, 1 dwg