Dosing pump for analytical instrumentation

The compact micro annular gear pump mzr-4622X1 of the low pressure series is an innovative pump concept for use in analytical instrumentation. The pump generates a low pulsation, highly precise flow featuring low shear stress. It dispenses at a high precision the lowest volumes in microliter range. The compact design with a brushless motor as well as an integrated motion controller for speed and position control small dimensions are the characteristics of this variant of the low pressure series. The pump is suitable for dosage of low viscosity liquids such as deionized water, watery solutions, methanol, solvents, oil and lubricants.


  • Small dosage volumes, high flow rates
    smallest volume 2 µl – flow up to 72 ml/min
  • High dosage precision
    precision CV 1 % at low volumes
  • Integrated motion controller
    programmable motor control for speed and position control with RS-232 interface
  • Long service life
    wear-resistant tungsten carbide or ceramics
  • Low pulsation delivery, low shear stress
    rotary micro annular gear technology


  • Analytical instrumentation
  • Laboratory automation
  • In vitro diagnostics
  • Flow cytometry

Flow charts

Technical data

  • Flow rate
    0.12 - 72 ml/min
  • Smallest dosage volume
    2 µl
  • Displacement volume
    12 µl
  • Differential pressure range
    0 - 5 bar (73 psi)
  • Maximum inlet pressure
    1 bar (15 psi)
  • Liquid temperature range
    -20 ... +60 °C (-4 ...+140 °F)
  • Viscosity range
    0.3 – 1,000 mPas
  • Precision CV
    1 % (Coefficient of variation CV)
  • Velocity range
    10 – 6,000 rpm
  • Fluid connection
    slip fittings with outside diameter 2 mm optional: manifold assembly
  • Wetted parts
    stainless steel 316L, ceramics, tungsten carbide Ni based, epoxy resin, optional: alloy C22 (2.4602) instead of stainless steel, ceramics instead of tungsten carbide; shaft seal: graphite-reinforced PTFE, stainless steel 316L, optional: alloy C276 (2.4819) instead of stainless steel; static seals: FPM, optional: EPDM, FFPM
  • Motor
    brushless DC-Servomotor, 24 V; 6.4 W
  • Controller
    integrated motion controller
  • Electrical connection
    8-pole connector
  • Interface
    RS-232, input 0-10 V, 1 digital 24 V; output 1 digital programmable
  • Dimensions (L x W x H)
    Ø 22 mm, length 96 mm
  • Weight
    approx. 185 g (manifold assembly approx. 200 g)
  • Remarks
    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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