Resistant customized dosing pump

The micro annular gear pump mzr-2542 of the modular series is suitable for dispensing and metering of aggressive or corrosive liquids. Equipped with oxide ceramic bearings, the material configuration of the pump body as well as of the rotors can be individually selected. Depending on the nature of the delivered liquid, a choice of different resistant components allows a customized configuration. The rotors are available in ZrO2-ceramics or in tungsten carbide. Alloy C22 and PEEK™ are the different housing options.


  • Chemically inert materials
    pump components in ceramics, tungsten carbide, alloy C22, alloy C276, PEEK™
  • High dosage precision
    precision CV 1% at low volumes
  • Long service life
    wear-resistant, ultra hard materials
  • Compact dimensions
    length 90 mm, diameter 18 mm
  • Dynamic smart drive and control
    DC precision motor with integrated encoder
  • Low pulsation delivery, low shear stress
    rotary micro annular gear technology, no valves


  • Analytical technology
  • Biotechnology
  • Microreaction technology
  • Laboratory automation
  • Medical engineering

Flow charts

Technical data

  • Flow rate
    0.15 – 9 (min. 0.0015 *) ml/min
  • Smallest dosage volume
    0.25 µl
  • Displacement volume
    1.5 µl
  • Differential pressure range
    0 - 3 bar (43.5 psi)
  • Maximum inlet pressure
    1 bar (15 psi)
  • Liquid temperature range
    -20 ... +60 °C (-4 ... +140 °F)
  • Viscosity range
    0.3 – 100 (max. 1,000 *) mPas
  • Precision CV
    1 % (Coefficient of variation CV)
  • Velocity range
    100 – 6,000 (min. 1 *) rpm
  • Fluid connection
    slip fittings with outside diameter 2 mm; optional: manifold assembly M2.1
  • Wetted parts
    Alloy C22 (2.4602), optional: PEEK™; shaft ZrO2 ceramics; rotors partially stabilized ZrO2; epoxy resin; shaft seal: graphite-reinforced PTFE, alloy C276; static seals: FFPM, optional: FPM, EPDM
  • Motor
    DC-motor with graphite brushes, assigned power rating 4.5 W, nominal voltage 24 V, digital magnet encoder 32 counts per turn
  • Electrical connection
    10-pole connector
  • Dimensions (L x W x H)
    Ø 18 mm, length 90 mm
  • Weight
    approx. 65 g
  • Remarks
    * depending on accessories, Customized solutions on request.
  • Notice
    Even if single parameters are within the indicated performance range of technical data, certain parameter combinations may not be achievable. Single parameters may exceed their indicated performance range under adequate circumstances. For detailed evaluation please contact HNP Mikrosysteme. Actual performance may vary. Specifications are subject to change without notice. 
    This document is subject to change without notice.

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