1.Good performance and favourable price. 2.We also take customers requirements order. 3.High quality. Cathodic Protection rectifiers are designed for protection of underground metal constructions such as pipelines, oil wells against soil/electrochemical corrosion. CP rectifiers are suitable to adopt all kinds of reference electrodes, like Zn, Ag/AgCl, Cu/CuSo4 electrode. Transformer Rectifier