Water purification

Flexible lab systems designed for your applications

For more than 130 years, Thermo Scientific™ lab water systems have been a trusted resource for science and industry. Our complete line of water purification technologies includes solutions for your most critical and everyday application needs, from electrodeionization to reverse osmosis and distillation.

Download the Waterbook, browse through our portfolio below or ask one of our experts to help tailor a solution specific to your needs.

Select from a variety of Thermo Scientific Barnstead Water Systems

Type 1 water purification systems produce high-quality Type 1 ultrapure water with advanced ato conventional functionalities. Select Type 1 or a dual Type 1/Type 2 for broadened laboratory versatility and convenience.

Type 2 water purification systems, including distillation, offer a wide selection of purification methods, capabilities and options with  low-maintenance operation.

Type 3 water purification systems use reverse osmosis to deliver rugged performance with low maintenance and dependability.

Enhance your water system with a variety of water system accessories and consumables, including pumps, filters and cartridges, storage accessories, and replacement parts.

Use the system that employs multiple chemistries and technologies synergistically to minimize impurities in feed water sources.


Our line of water purification technologies includes solutions for critical and everyday application needs—from electrodeionization to reverse osmosis to distillation. We support new construction or remodeling project in all stages of the process.

To protect your investment and to consistently produce the best water quality, it's important to maintain your water purification system by replacing consumables such as cartridges, filters, UV lights, etc. on a regular basis.

ASTM Standards for Reagent Water

Reagent water has quantitative specifications that describe the level of purity for the water. These specifications have been described by ASTM (American Society for Testing and Materials) D1193, ISO (International Organization for Standardization) 3696.

The most commonly used standards, ASTM D1193-6, are summarized in the tables below

Reagent Water Measurement (unit)Type 1Type 2Type 3
Resistivity (MΩ.cm) at 25 °C >18>1>4
Total organic carbon (ppb)<50<50<200
Sodium (ppb)<1<5<10
Chloride (ppb)<1<5<10
Total silica (ppb)<3<3<500

What Type of Water Do You Need?

When designing your water system, we suggest you take time to evaluate the applications and interest areas of the lab now and in the future. Take a look at the table below to determine what type(s) of water you need.


Type of water

Application and interest areas

Type 1
Type 2
Type 3
Cartridge and filter systems
General Lab Purpose
Glassware washing/rinsing 
General lab equipment (water baths, incubators, etc.) 
Feed water to Type 1 systems   
Media prep   
Buffer prep   
Chemical and biochemical reagent prep   
High performance liquid chromatography (HPLC)   
Gas chromatography (GC)   
Ion chromatography (IC)   
Inductively coupled plasma spectroscopy (ICP)   
Mass spectroscopy (MS)    
Atomic absorption (AA)   
Total organic carbon (TOC)    
Life Sciences
Genomics (ex. PCR, mutagenesis)   
Proteomics (ex. crystallography, electrophoresis)   
Immunology (ex. monoclonal antibody production, blots)   
Cell and tissue culture   
Drug discovery   
Molecular biology   

Use the system that employs multiple chemistries and technologies synergistically to minimize impurities in feed water sources.

Featured water purification videos

Innovation. Flexibility. Convenience.

Exceptional lab water systems without the attitude. Watch the Barnstead water purification systems in action.

Barnstead Smart2Pure Pro

Learn about the ultrapure water purification system that delivers type 1 water for all your lab needs.

Lab Water Source Webinars