Abstract: According to the present invention, a glass electrode for measuring the oxidation potential of liquid media comprises a tubular casing made of a high-resistance glass. A sensing element is tightly sealed to the tube and is rigidly connected to a current lead disposed within the tube. The sensing element is made of a glass featuring electronic conduction and containing tri- and tetravalent titanium oxides and those of pentavalent niobium and/or tantalum, at the following ratio of the components taken in parts by weight:SiO.sub.2 --35 to 45Me.sub.2 O--7.0 to 26, wherein Me is Li, Na, KTiO.sub.2 --16 to 40Ti.sub.2 O.sub.3 --0.8 to 4.2Nb.sub.2 O.sub.5 and/or Ta.sub.2 O.sub.5 --2.0 to 32The use of the proposed electrode made it possible to measure the oxidation potentials ranging from -700 to 1250 mV in solutions having a pH of from -0.5 to 14, at the temperatures ranging from 0 to 150.degree. C., in the presence of dissolved oxygen, hydrogen and catalyst poisons.