In current laboratory testing, ultrapure water machine is a basic configuration instrument. Laboratory ultrapure water machine is roughly divided into four units: pretreatment, reverse osmosis, ion exchange, and terminal ultrafiltration.

There are differences between pure water machines and ultrapure water machines, but the water output of pure water machines is not necessarily finer than that of ultrapure water machines. The water output of ultrapure water machines is different according to different customers and different requirements, and the water quality is also different. They are mostly used in laboratories and are divided into heat source ultrapure water machines, physical and chemical analysis ultrapure water machines, low organic matter ultrapure water machines, genetic research ultrapure water machines, laboratory ultrapure water machines, as well as industrial pure water machines.

Ultrapure water system uses pretreatment, reverse osmosis technology, ultrapurification treatment and post-treatment methods to almost completely remove the conductive medium in the water, and remove the non-dissociated colloids, gases and organic matter in the water to a very low level.