EDI (Elctrodeonization) is a pure water manufacturing technology that combines ion exchange technology, ion exchange membrane technology, and ion electromigration technology. It cleverly combines electrodialysis and ion exchange technology, and the development of this technology overcomes the limitations of ion exchange resins. It uses high voltage at both ends of the electrode to move charged ions in water, and cooperates with ion exchange resins and selective resin membranes to accelerate ion movement and removal, thereby achieving the goal of water purification. In the EDI desalination process, ions are removed through ion exchange membranes under the action of an electric field. At the same time, water passes through one or more lumens filled with ion exchange resins between cation or anion selective membranes. Under the action of an electric field, ions move towards both sides of the lumens and enter other lumens between the ion exchange resins. This process also produces H+and OH - ions required to maintain the resin in a regenerated state through electrolysis. The ions flowing towards the independent lumens on both sides are washed away by water.

The maximum water resistance rate of its output can reach 15M Ω· cm.