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Milli-Q® SQ 2Series Water Purification Systems


A New Way to Think About Ultrapure Water

Every lab bench in need can now easily access freshly purified ultrapure water—even distant benches without feed tap water. New Milli-Q® SQ 2Series water purification systems are simple, robust, innovative and completely scalable so that you can focus on your science.

To view installation and demo videos or download user manuals, visit our Installation & Use Page.


How Milli-Q® SQ 2Series Lab Water Systems Work

Thanks to its completely scalable design, any lab bench with an electrical outlet can easily access fresh purified 18.2 MΩ∙cm ultrapure water.

  1. Rapidly fill the 3.5 L Switch tank with reverse osmosis (RO) water in as few as 6 minutes.
  2. Easily carry the Switch tank to your science.
  3. Dispense freshly polished 18.2 MΩ∙cm ultrapure water at any bench.
  4. Repeat as needed.

Milli-Q® SQ 2Series System Configurations

The Milli-Q® SQ 2Series offers a choice of configurations that make the system adaptable and scalable to nearly any lab or building setup. Simply select the setup that best fits your space and user requirements, then easily expand with more modules as your lab evolves. Features common to nearly all Milli-Q® SQ 2Series system configurations include:

  • Rapid pure RO production at a rate of up to 42 L/h, filling the 3.5 L Switch tank in as few as 6 min
  • Ergonomic dispensing of ultrapure water, from 1.6 L/min to drop by drop
  • Simply expand capabilities by adding autonomous ultrapure water dispensing modules (ZSQ200U0T0)
Milli-Q SQ 240 system configuration consisting of RO water production station and ultrapure water dispensing module
Milli-Q® SQ 240 (ZSQ240R0TK)
  • Standard configuration
  • Suitable for one small team
  • Install dispensing module next to an ultrapure water need
Milli-Q SQ 240L system composed of RO water production station with 2 Switch tanks and ultrapure water dispensing module
Milli-Q® SQ 240L (ZSQ240RLTK)
  • Dual tank configuration
  • Suitable for multiple or larger teams
  • Install dispensing module next to an ultrapure water need
Milli-Q SQ 240XL system composed of RO water production station with both 3.5L and 50L tanks and ultrapure water dispensing module
Milli-Q® SQ 240XL (ZSQ240RXTK)
  • 50L tank configuration
  • Suitable for direct feed of lab equipment from the 50 L tank
  • Install dispensing module next to an ultrapure water need
Combined Milli-Q SQ 240C system configuration with both RO water production and ultrapure water dispensing as one unit
Milli-Q® SQ 240C (ZSQ240UCTK)
  • Combined configuration
  • Suitable for one small lab or team
  • Install system next to a sink
Combined Milli-Q SQ 240CV system configuration with both RO water production and ultrapure water preset volume dispensing
Milli-Q® SQ 240CV (ZSQ240UCVTK)
  • Combined, preset volume configuration
  • Suitable for routine lab activities
  • Repeat serial ultrapure water preset volume dispense from a fixed point
  • Install system next to a sink
Milli-Q SQ 200P system configuration composed of ultrapure water dispensing module for connection to a pressurized pure water loop
Milli-Q® SQ 200P (ZSQ200UPT0)
  • Pressurized loop configuration
  • Suitable for labs with a pressurized purified water loop
  • Connect system to a pressurized pure water loop
  • Expand capabilities by connecting additional systems to the pressurized pure water loop

Features and Benefits

Here are just some of the benefits you’ll experience with a Milli-Q® SQ 2Series system in your lab:

Use thumb to slide lever right to increase flow rate and slide left to decrease flow rate

Unique Innovations

The system has patents pending for 8 technical and design IP filings, including: 

  • Mechanical intelligence that allows for intuitive filling with just the push or pull of your thumb
  • Two-way multi-lumen tubing that recirculates water to secure the quality of ultrapure water 
  • Exceptionally high-flow RO membrane (up to 42 L/h) refills the Switch tank in as few as 6 min
    Transparent, mobile Switch Tank is easy to carry between RO water production station & ultrapure water dispensing module

    The system is easy and intuitive to install, operate and maintain for any user.

    • Proven, do-it-yourself self-installation (~30 min)
    • Universal interface
    • Ergonomic dispensing 
    • Mobile, transparent tank
    • Twist & Lock cartridge changes
    • No need to replace the UV lamp
      Milli-Q® SQ 2Series system footprint is the same as a sheet of paper and only an electrical plug is needed to dispense wate

      The uniquely small size leaves space for your science at any lab bench.

      • System units have the same footprint as a sheet of paper: 22x27 cm/unit 
      • Only an electrical outlet (and no water inlet) is needed to dispense ultrapure water
        Lab setup with 1 RO water production station next to tap feed water plus 3 ultrapure water dispensing modules in different rooms

        Find the configuration that best fits your space and user requirements. Then easily expand with unlimited ultrapure water dispensing modules as your lab evolves.

          LED of Milli-Q SQ 2Series dispensing module shows as green when ultrapure water is ready to dispense.

          Proven Milli-Q® water purification technologies mean you can trust your system is always ready to dispense consistent quality 18.2 MΩ∙cm @25 oC ultrapure water.

          • High efficiency removal of ions down to trace levels with SQPAK™ Quanta polishing cartridge
          • For organic-sensitive applications, SQPAK™ TOC Quanta cartridge contains activated carbon
          • Pure RO water quality is maintained by regular rinsing of the RO membrane
          • Choice of final filters can match your specific application needs

            Milli-Q® SQ 2Series Water Systems are Greener Alternative Products

            As part of our Design for Sustainability (DfS) approach to product development, Milli-Q® SQ 2Series systems were developed to deliver high-quality ultrapure water at multiple locations with a reduced environmental footprint compared to previous generation Direct-Q® systems.

            As a result of these efforts, these new systems are labeled Greener Alternative Products thanks to the following improvements versus previous generation systems:

            • Consume less electricity thanks to simplified design, minimized electronics, and optimized stand-by mode (where most energy is consumed)
            • Consume less water during manufacturing and use 
            • Limited material requirements if 2 or more dispensing locations thanks to a modular design
            • Packaging consists of 100% recycled cardboard with sustainable forestry certification, and protective inserts made of PE with 50% recycled content

            The precise sustainability gains depend on the selected Milli-Q® SQ 2Series system configuration. We invite you to review the DfS Scorecard for the below three configurations to support you in making greener purchasing decision:

            Contact service support for more information. 



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