For industrial production and process technology

The micro annular gear pump mzr-7205 covers the flow rate range 0.048-288 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-7205 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 even for low viscosity liquids
  • Compact dimensions
    length 156 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

Flow charts

Technical data

  • Flow rate
    0.048 - 288 ml/min
  • Smallest dosage volume
    30 µl
  • Displacement volume
    48 µl
  • Differential pressure range
    0 – 40 bar (580 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 – 50,000 (1,000,000 *) mPas
  • Precision CV
    < 1% (Coefficient of variation CV)
  • Velocity range
    1 - 6,000 rpm
  • Fluid connection
    1/8" NPT internal thread, lateral optional: 1/8" NPT internal thread, frontal
  • Wetted parts
    stainless steel 316L (1.4404, 1.4435), tungsten carbide Ni-based; shaft seal: graphite-reinforced PTFE, stainless steel 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)
    156 x 50 x 69 mm
  • Weight
    approx. 1080 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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