Clark electrode
（重定向自Oxygen electrode）
![Clark-type electrode: (A) Pt- (B) Ag/AgCl-electrode (C) KCl electrolyte (D) Teflon membrane (E) rubber ring (F) voltage supply (G) galvanometer](/Images/godic/202501/31/Clark_Electrode4140.png")
The Clark electrode is an electrode that measures oxygen on a catalytic platinum surface using the net reaction:
It improves on a bare platinum electrode by use of a membrane to reduce fouling and metal plating onto the platinum.