MERCK Direct-Q® UV Water Purification System

Direct-Q® systems deliver both pure and ultrapure water directly from tap for use with a wide variety of applications in your lab. Direct-Q® systems can be equipped with integrated or external reservoirs and are designed for under bench-, bench- or wall-mounting. The system’s built-in 185nm UV lamp reduces the levels of organics for critical applications. You can fine-tune your ultrapure water quality to match your applications using Application specific point-of-use polishers to remove specific contaminants such as bacteria, particulates, pyrogen, nucleases, endocrine disruptors or volatile organic compounds.

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Direct-Q® systems deliver both RO (Type 3) and ultrapure (Type 1) water directly from tap.

With the Direct-Q® range of water purification systems, you benefit from a choice of ultrapure water configurations. All systems produce Type 1 water (18.2 MΩ•cm at 25 °C ultrapure water) on demand from the RO stage, the first step in the purification chain. Depending on daily volume needs, different RO production flow rates are available (3, 5 & 8 L/h). Type 3 water is easily available from the 6L built-in storage tank, or the external 30/60 L storage tanks for the higher flow rates, or can be sent by a distribution pump to feed instruments such as a glassware washing machine.

For applications sensitive to organic contaminants and requiring ultrapure water, a UV version of the Direct-Q® system is also available. It incorporates a dual wavelength UV lamp for photooxidation of organic compounds. A final purification step at the point-of-dispense removes specific contaminants critical for your experiments. A range of purification cartridges and Application-Paks is available for you to select according to your requirements.

Simple handling and maintenance

  • – Easy installation anywhere in your laboratory with its compact design and optional remote dispenser. Either wall-mounted, on or under the bench, choose the setup that is most convenient for your daily work.
  • – Dispensing adapted to different size laboratory glassware at an instant flow rate of 0.5 L/min.
  • – Save time thanks to the volumetric function. It will automatically deliver the water volume that you requested.
  • – Easily insert your pack in one movement with the patented locking mechanism.


Catalogue Number: ZRQSVP3WW

Product Information
Daily Product Water Usage          
  • 40 L/Day
Feed Water Nature          
  • Potable Tap Water
Product Water Particulates          < 1 unit/mL (particulates >0.22 μm – with Millipak® or Biopak® point-of-use filters)
Water Quality          
  • Type 1
  • Type 3

Biological Information
Ionic rejection by RO          ≥ 96%
Organic rejection by RO          ≥ 99% for MW ≥ 200
Particulate rejection by RO          ≥ 99%
Product Water DNase          < 5 pg/mL (with Biopak® Polisher)
Product Water Microorganisms          < 0.1 CFU/mL (with Millipak® or Biopak® point-of-use filters)
Product Water Pyrogens          < 0.001 EU/mL (with Biopak® Polisher)
Product Water RNase          < 1 pg/mL (with Biopak® Polisher)

Physicochemical Information
Make-up flow rate          3 L/h
Flow Rate          3 L/h
Product Water Resistivity at 25 °C          
  • 18.2 MΩ·cm
Product Water TOC          < 5 ppb
  • 100–230 V / 50–60 Hz

Height          54 cm (21.3 in)
Width          29 cm (11.4 in)
Depth          42 cm (16.5 in)
Operating Weight          18.2 kg (40.1 lb)
Product Water Instant Delivery Rate          > 0.5 L/min

Servicing, Calibration and Support

Imbros’ local engineering department can service, repair and calibrate your instrument without expensive shipping costs or wait times.


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