I. Clarify the source of incoming water:

Is the water source city tap water or pure water (deionized water, distilled water)? If the quality of municipal tap water is poor (TDS≥300, add enhanced pretreatment, such as softener, KDF, etc.).

II. Know the water consumption:
User water consumption should be considered from the following aspects:

1. Water intake method, that is, whether water is taken continuously or intermittently during work, and whether there are special requirements for outlet pressure or water storage tanks, hoses, etc.;

2. Peak water consumption, that is, the duration and water consumption requirements of the peak water consumption period, to determine the machine specification configuration;

3. Daily water consumption, which is divided into pure water and ultrapure water, to further determine the specifications of the required products.

III. Water quality:

Water quality requirements, according to the Chinese National Laboratory Water (GB6682-2000) standard, and also according to whether the experiment has specific requirements for TOC, bacteria, heat source, microparticles, etc., that is, which experiment is used for or which instruments and equipment are used in conjunction with, such as atomic absorption spectroscopy (AAS), microbial analysis, general chemistry, cell culture, biochemical analysis, etc. Clarifying these will completely determine the product specifications and models. Mastering the above points makes it easy to select an ultrapure water machine.