▎ 摘　　要

NOVELTY - The non-polarizable reference electrode has a non-conductive housing that is filled with a saturated solution of copper sulfate in a mixture of water and ethylene glycol, and a potential sensor mounted on the housing. A base body is designed as a ring nut with a threaded hole. A graphene ion exchange membrane is fixed in a lower housing portion through a gasket via the ring nut and has a lower surface which is in contact to ground. An outer portion of the ring nut is provided with notches for the fingers. USE - Non-polarizable reference electrode for use in cathodic protection apparatus for use in measuring potential of underground metal structures. ADVANTAGE - The non-polarizable reference electrode has a graphene ion exchange membrane that is made durable with a number of thin graphene layers and is more permeable than a polymer ion-exchange membrane.