Electrode contacts are a kind of metal conductive or signal transmission medium used in conventional batteries, hydrogen energy fuel cells, new energy batteries, electrolyzers, PCB circuit boards, and electronic and electrical equipment. They are usually made of copper, iron, stainless steel, aluminum, titanium and other materials. The surface is generally electroplated: CT plating, silver plating, nickel plating, gold plating, etc. to improve the conductivity.

Tantalum grounding electrode ring is directly in contact with the medium through grounding, and then grounded through the instrument to achieve the same potential as the ground, thereby eliminating electromagnetic interference.