Zinc reference electrode suitable for seawater, fresh and sea water, the soil, the outside of the tank tank bottom cathodic protection of the environment, the reference electrode is the important part of the cathodic protection system. It can be used to measure the potential of the structures to be protected, but also as a potentiostat automatic control signal source. Common buried electrode have Cu/CuSO4 reference electrode and a zinc reference electrode, zinc reference electrode due to the characteristics of its compressive than the place can not be used in some of the ceramic pot sulfur the suan copper parameter showing its long life parameters advantage. While zinc reference electrode potential is less stable than sulfur suan copper reference electrode, it is proposed the combination of both. http://www.jzssd.com/html/product/pro_one/yjbhpt/21.html