Choosing a pure water system that suits your needs is an important decision, as different applications require different water quality standards. Here are some recommended steps for selecting a pure water system:

1. Clarify what type of water quality your application requires. Different applications require different water quality standards. For example, general laboratory work may require Type II pure water, while molecular biology or cell culture may require higher levels of Ultra Pure Water (Type I). Ensure that you understand the minimum water quality standards required for your application.

2. Understand the quality of water sources: You need to understand the quality of your water source, as the quality of the water source can affect the effectiveness of the pure water system. If there are specific pollutants or issues in your water source, you may need to consider additional pre-treatment steps.

3. Choose a suitable pure water system: Based on your application needs and water source quality, choose a suitable pure water system. The following are some common types of pure water systems:

Ultra pure water system: including reverse osmosis and other purification steps, suitable for applications that require highly purified water, such as molecular biology and cell culture.

Ion exchange resin system: used to remove specific ions and suitable for specific applications such as ion analysis.

Mixed bed ion exchange system: used for producing high-purity water, such as electronic grade water.

Additional equipment for water purifiers: Some applications may require additional equipment, such as TOC analyzers or microporous filters.

4. Maintenance and operational costs: Consider the operational costs of the system, including consumables replacement, maintenance, and calibration. The operating costs of different systems may vary.

5. Installation and training: Consider the training needs for installing and operating pure water systems. Ensure that your staff understand how to operate and maintain the system correctly.

6. Budget: Consider your budget. Pure water systems of different types and scales have different prices, so it is necessary to find a balance between quality and performance.