1) The electrode is small and convenient to carry. It is easy to observe the saturation of the internal copper sulfate solution.

2) The electrode potential is not disorderly, and the electrode is not easy to polarization.

3) Long life of the electrode, easy to fill the solution, one irrigation can be used for more than a year.

4) The electrode structure is firm, the joint is corrosion-resistant, the microporous membrane leakage rate is suitable, no visible liquid flow, can be placed in the pocket.