For industrial production and process technology

The micro annular gear pump mzr-2505 covers the flow rate range 0.0015 - 9 ml/min. To the main assets of the device belong high precision, low pulsation, low volume dosage even of non-lubricating liquids or at high  pressures, compact design and an integrated microcontroller. The pump allows dosage in a broad viscosity range and shows small, economic dimensions. The mzr-2505 targets applications in industrial production and process technology. The pump has been designed for continuous delivery and discrete dosage of water, watery solutions, solvents, methanol, oil, lubricants, adhesives, inks and paints as well as other high viscosity liquids.


  • High dosage precision
    precision CV < 1 % at low volumes
  • High differential pressures
    achievable also for low viscosity liquids
  • Compact dimensions
    length 140 mm, including controller
  • Broad viscosity range
    methanol, water, solvents, adhesives, grease, gel
  • Low pulsation delivery, low shear stress
    rotary micro annular gear technology
  • Long service life
    wear-resistant tungsten carbide
  • Precision motor and sophisticated control
    DC-servomotor with integrated microcontroller


  • Chemical processing
  • Industrial and plant engineering
  • Packaging
  • Medical and pharmaceutical industry
  • Mini plant technology
  • Spray technology
  • Dispensing of adhesives
  • Ink and paint dosage
  • Vacuum applications

Technical data

  • Flow rate
    0.0015 - 9 ml/min (min. 10 µl/h *)
  • Smallest dosage volume
  • Displacement volume
    1.5 µl
  • Differential pressure range
    0 – 30 bar (435 psi)
  • Maximum inlet pressure
    5 bar (73 psi)
  • Liquid temperature range
    -5 ... +60 °C (-20 ... +150 °C *) +23 ... +140 °F (-4 ... +302 °F *)
  • Viscosity range
    0.3 - 25,000 mPas
  • Precision CV
    < 1% (Coefficient of variation CV)
  • Velocity range
    1 - 6,000 rpm
  • Fluid connection
    1/4"–28 UNF, frontal; optional: inlet 1/8" NPT internal thread, lateral; G1/8" lateral
  • Wetted parts
    stainless steel 316L (1.4404, 1.4435), tungsten carbide Ni-based; shaft seal: graphite-reinforced PTFE, 316L static seals: FPM, optional: EPDM, FFPM
  • Motor
    DC-servomotor, 24 V DC, 44 W
  • Controller
    integrated 16-bit, microcontroller
  • Interface
    0-10 V, RS-232, 1 digital input/output
  • Dimensions (L x W x H)
    140 x 45 x 65 mm
  • Weight
    approx. 780 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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