PH-PROBE Russian patent published in 1996 - IPC

FIELD: medical equipment, intended for determining the concentration of hydrogen ions (pH) of biological media. SUBSTANCE: the pH-probe has measuring antimony electrodes in the form of rings rigidly secured on thin-walled sleeves, sealed hose fitted onto the sleeves, chlorine-silver comparison electrode positioned in a non-metallic casing with an electrolytic switch, and conductors connecting the electrodes to the connector. The pH-probe uses an independent casing of the chlorine- silver electrode supplemented with a detachable bowl- shaped adapter, whose bottom has a through hole through which a capillary-porous wick is passed. Part of the wick positioned inside the adapter is impregnated with conductive paste and contacts with the electrolytic switch of the chlorine-silver electrode via a layer of this paste. The other part of the wick is positioned outside the adapter, and the hose working end is sealed by means of the end antimony electrode made in the form of a cylinder and rigidly secured in the hole on the hose end. The hose working end can be sealed by attachment of a non-metallic end-piece on the sleeve of the end antimony electrode. EFFECT: enhanced accuracy. 3 cl, 1 dwg