Water Purification Systems
Water Purification Systems
Find a water purification system that delivers the quality your lab requires. Explore reverse osmosis and polishing units that produce Type III or Type I water using technologies such as carbon filtration, deionization, ultrafiltration, and UV. Choose the model that matches your purity and throughput needs.
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FAQs
Resistivity of the water determines the water type and is often monitored in water purification systems.
Resistivity Levels by Laboratory Water Type
Water Type | Resistivity Range | Conductivity Equivalent | Typical Use |
|---|---|---|---|
Type I (Ultrapure) | 18.2 MΩ·cm (at 25°C) | 0.055 µS/cm | HPLC, LC-MS, ICP-MS, PCR, cell culture, molecular biology |
Type II (Pure) | 1 – 10 MΩ·cm | 1.0 – 0.1 µS/cm | Reagent prep, buffers, microbiology media, general analytical work |
Type III (RO or Primary Grade) | 0.05 – 0.5 MΩ·cm | 20 – 2 µS/cm | Glassware washing, autoclave feed, feedwater for Type I/II systems |
Other parameters that are important and are sometimes monitored are: TOC (Total Organic Carbon) for analytical work and bacteria/endotoxin levels for life science applications.
Replacement intervals depend on usage and feedwater quality.
Most systems require cartridge replacement every 3-12 months.
It will depend on the system as some systems are designed for tap water feed.
However, poor feedwater quality may require pretreatment to determine the quality of your feedwater and recommend the best water system for your application: https://www.labconco.com/water-profile-test-kit.
Water quality level requirement for the final rinse in a glassware washer varies depending on the application the glassware will be used for. Type II water is commonly used in the final rinse cycle when glassware is used in workflows that involve analytical analysis. Type III water is used in the final rinse cycle for general laboratory applications that are less sensitive. Type I water is NEVER recommended to be used in a glassware washer, as it is so pure it can be corrosive to the washer.
