Each of the above crafts has its own advantages, you can choose the craft that suits you according to your own situation. With the development of science, many new processes have replaced the old ones. At present, the use of reverse osmosis to produce high-purity water has become popular. In recent decades, the mixed bed ion exchange technology has been the standard process for the preparation of ultrapure water. Because it needs periodic regeneration and a large amount of chemicals (acid and alkali) and pure water are used in the regeneration process, which causes certain environmental problems, it is necessary to develop an acid- and alkali-free ultrapure water system. Ultra-pure water equipment adopts pretreatment, reverse osmosis technology, mixed bed, EDI device and post-treatment methods to almost completely remove the conductive medium in the water, and also remove the non-dissociated colloidal substances, gases and organic matter in the water to a very low level. Degree of water treatment equipment. Ultrapure water equipment is also called: ultrapure water device, ultrapure water machine, ultrapure water meter, ultrapure water system, laboratory ultrapure water device, etc. The resistivity of the ultrapure water produced by the ultrapure water machine should generally be greater than 10 megohms, and the water above 10 megohms is called ultrapure water. Generally, the effluent of ultrapure water can reach 18.25 megohms.