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Milli-DI® Water Purification System

AC/DC input 9 V (battery), flow rate 0.5-0.7 L/min, An ideal solution to produce deionized water directly from tap water


pkg of 1 unit


0.5-0.7 L/min flow rate
40 L/day max. usage
5.6 kg operating weight (12.3 lb)

H × W × D

42.9 cm (16.9 in.) × 27 cm (10.6 in.) × 17 cm (6.7 in.)


feed water nature potable tap water

General description

The Milli-DI® system is a compact and easy-to-use water purification system that instantly provides deionized water. This battery-powered system is suitable for users requiring low volumes of purified water, 3 to 5 L/day. Operation and maintenance of the Milli-DI® system is simple; a green LED light indicates good water quality, and a red LED light indicates that the DI-PAK® purification pack needs to be replaced. Designed for quick exchange, the DI-PAK® purification pack can be easily snapped in and out in seconds without risk of leakage.


The system is especially suitable for standard chemical applications, for the production of buffers and reagents, as well as microbiological culture media. Further, it can also be used as good pretreatment source for the Simplicity® systems.

Features and Benefits

  • Compact and easy to use.
  • Battery-powered with no need for electric outlet.
  • Easy maintenance due to purification pack design.
  • Built-in resistivity meter for easy control of water quality.
  • Optional Millipak® 0.22 μm filter to produce bacteria-free deionized water.


  • A specific country box with the user manual in the local language and a power cord adapted to the local electrical network needs to be ordered additionally to this catalog number.
  • The indicated price currently corresponds to the above catalogue number only; it is subject to change at any time without notice.
  • This catalogue number does not include consumables, accessories, and other products and/or services that may be required for the installation and the correct operation of the water purification unit over time.
  • Because our customers each have specific purified water needs, we recommend that you have your purchase validated by one of our specialists. We remain at your disposal to advise you, do not hesitate to contact us!

Other Notes

For more information on this product please contact our Technical Service Team

Legal Information

DI-PAK is a registered trademark of Merck KGaA, Darmstadt, Germany
MILLI-DI is a registered trademark of Merck KGaA, Darmstadt, Germany
MILLIPAK is a registered trademark of Merck KGaA, Darmstadt, Germany
SIMPLICITY is a registered trademark of Merck KGaA, Darmstadt, Germany

Certificate of Analysis

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Certificate of Quality

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Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

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