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Milli-Q® HX 7120 Water Purification System 230V 50/60 Hz

Centralized pure water solution for up to 2400 L/day Type 2 water

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AC/DC input

100 - 230 V, 50 - 60 Hz

Quality Level


pkg of 1 unit


120 L/hr make-up flow rate
2400 L/day max. usage
94 kg operating weight (208 lb)


>5 MΩ-cm, 25°C

H × W × D

124 cm (48.8 in.) × 54.3 cm (21.4 in.) × 54.2 cm (21.3 in.)

total organic carbon (TOC) residue

<30 ppb (Product Water)


feed water nature potable tap water


product water quality: type 2 water (> 5 MΩ·cm)


<0.2 μS/cm at 25 °C

General description

  • Milli-Q®HX 7000 systems are designed to deliver high and consistent pure water quality for regular laboratory applications and for instrument feed.
  • Milli-Q® HX 7120 high-flow system is designed to produce up to 2400 L/day of Type 2 pure water from potable tap feed water, making them ideal for large laboratories or lab buildings.
  • Tap water is first treated by the Progard® pretreatment cartridge to efficiently remove particles, colloids, free chlorine and hardness. Advanced reverse osmosis (RO) purification then removes 95-99% of ions, and 99% of all dissolved organics (>200 Da), microorganisms and particles. Patented E.R.A.® (Evolutive Reject Adjustment) technology automatically assesses feed water quality to produce a constant flow rate and optimize water recovery (between 45% and 75%). The Elix® electrodeionization (EDI) module further removes ions to typically reach resistivity >5 MΩ.cm (at 25 °C).
  • Processed pure water is then irradiated by a bactericidal UV lamp before entering a storage tank or SDS 500 storage, protection and distribution system. The SDS 500 reservoir maintains the consistent purity of stored water. Its vent filter provides effective protection against airborne contaminants and the Automatic Sanitization Module (ASM) prevents bacterial growth and biofilm formation.
  • Milli-Q® HX 7120 product water can then be sent by a distribution pump to feed instruments or a distribution loop. These can be integrated into a centralized system, providing total control of all parameters within the system itself as well as within the external pure water distribution loop.
  • The system′s large interactive touchscreen display offers a superior communication interface that shows main data (water production status, storage level, dispensing status), consumables exhaustion status, alerts status, and handy wizards to guide users through maintenance procedures.
  • These central systems are embedded with our unique MyMilli-Q® Remote Care online monitoring and service capability, which operates as an extension of Milli-Q® Services. This digital service lets you securely and remotely manage your system, supporting your lab′s optimal productivity.


  • Type 2 Elix® product water from the Milli-Q® HX 7120 system is suitable for microbiological media preparation, buffer preparation, and in manufacturing chemical and biochemical reagents.
  • It may be used to feed equipment such as weathering and stability test chambers, glassware washers, autoclaves and hydrogen generators. It may also feed a Milli-Q® ultrapure (Type 1) water system.
  • Because pure analytical-grade water is required for a broad range of laboratory applications, Milli-Q® HX 7000 systems are a perfect fit for labs everywhere, including those in the pharmaceutical, clinical, chemical, metallurgical, cosmetics, food and beverage, electronics and biotech sectors.

Features and Benefits

  • Progard® pretreatment packs efficiently remove particles (0.5 μm filter), free chlorine and colloids from tap water.
  • Advanced RO and E.R.A.® technologies optimize water recovery to maintain a constant flow rate and decrease water consumption. Users save water, time and money.
  • The Elix® EDI module ensures constant quality of pure water and low running costs.
  • UV lamps and final filtration provide full bacterial control.


  • The indicated price currently corresponds to the above catalog number only; it is subject to change at any time without notice.
  • This catalog 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!

Legal Information

E.R.A. is a registered trademark of Merck KGaA, Darmstadt, Germany
ELIX is a registered trademark of Merck KGaA, Darmstadt, Germany
Milli-Q is a registered trademark of Merck KGaA, Darmstadt, Germany
PROGARD is a registered trademark of Merck KGaA, Darmstadt, Germany

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