MilliporeSigma - Direct-Q 3

Manufactured by  MilliporeSigma
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Produce Type 1 and Type 3 reagent grade water directly from potable tap water

The Direct-Q 3 systems are designed for simple and intuitive operation. Water quality parameters (resistivity or conductivity, temperature) are clearly indicated on a bright color display. The Direct-Q 3 systems allow delivery of a fixed volume of Type I water and automatically shut off once the selected volume has been delivered.

The Type 1 product water is suitable for most low-volume laboratory applications, including the preparation of buffers for liquid chromatography separations and biochemical experiments, of solutions for analytical techniques such as spectrophotometry and spectroscopy, and of culture media.

For applications requiring very low organic contaminant levels, the
Direct-Q 3 UV system also incorporates a dual wavelength UV lamp to produce water with <5 ppb TOC, making it suitable for HPLC, GC, ILC and TOC analyses.

With the BioPak cartridge as a final filter, Direct-Q 3 systems produce pyrogen-free, RNase-free water for cell culture and molecular biology applications.
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Features of Direct-Q 3
  • Produce Type 1 ultrapure water (18.2 Ω·cm resistivity at 25 °C an < 10 ppb Total Organic Carbon) on demand directly from potable tap water.
  • with a built-in 185 and 254 nm UV lamp for production of low TOC water required by organic-sensitive applications.
  • Produce Type 3 (Reverse Osmosis) water for basic lab applications at a flow rate of 2.4 L/hr at 15 °C. Type III water is easily available from the 6 L built-in reservoir.
  • Maintenance reduced to a simple cartridge change once or twice a year.
  • Ideal for laboratories that do not have easy access to pretreated water and need between 1 and 10 L of ultrapure water per day.
  • Alarm warning in case of a sudden drop in the quality of the product water.
  • Dispensing adapted to different size laboratory glassware.
  • Time-saving fixed volume dispense.


  • Type 1 water for HPLC mobile phase preparation, sample dilution, buffer and cell culture media preparation, preparation of chemical solutions used with titrators, spectrophotometers and electrophoresis systems, preparation of culture media and reagents for molecular biology applications.
  • Type 3 water for low-volume non critical applications such as glassware washing or rinsing
General Specifications

There are no General Specifications available.

Additional Specifications

Resistivity, MΩ·cm at 25 °C: 18.2
TOC (Direct-Q 3 system): 0.22 µm)**: 0.5 L/ min
** With Millipak Express 20 (0.22 µm) membrane filter or with BioPak ultrafiltration cartridge as final polisher
***Only with BioPak ultrafiltration cartridge as final polisher

Series Modals

MilliporeSigma - Pure (Type 3)

[+] View Model Specifications

MilliporeSigma - Ultrapure (Type I)

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