OXYGEN ELECTRODE

PROBLEM TO BE SOLVED: To provide an oxygen electrode for oxygen partial pressure measurement in gas or liquid which is superior in stability with respect to the lapse of time of response speed. SOLUTION: This oxygen electrode is set in the housing of an oxygen electrode making silver of an opposite electrode and aqueous solution of halogen alkali metal salt respectively, and the housing is filled with electrolytic solution containing compounds, producing easy-to-dissolve-in-water compounds, by reacting difficult-to-dissolve-in-water silver halide with alkali metal salt, sodium thiosulfate, potassium carbonate, ammonium chloride or the like containing anion of silver ion and easy-to-dissolve-in-water ionic bond compound such as nitric acid ion, chloric acid ion, nitrous acid ion and sulfuric acid ion.