1. Product Features: The portable copper sulfate reference electrode is suitable for on-site use. Mainly used for measuring the natural potential and cathodic protection potential of underground metal pipelines, detecting stray currents in soil, and also for measuring the potential of cable metal sheaths and steel reinforcement in concrete. This electrode can serve as a reference electrode for control potential in the external current cathodic protection system in areas with sticky soil. It can be applied in various types of soil and freshwater. 2. Structural Performance: (1) The electrode is compact in size and easy to carry. The cavity is made of transparent organic glass or ABS tube, facilitating observation of the saturation of the copper sulfate solution inside. (2) The electrode potential is stable, and the electrode is not easily polarized. (3) The electrode has a long service life. The electrode cap and the electrode cavity are connected with a screw thread, making it convenient to fill the solution. One filling can last for over a year.