Micro annular gear pump mzr-7242

Fluid-dependent customizable dosing pump

The micro annular gear pump mzr-7242 of the modular pump series is suitable for dosing and metering in low to medium pressure and viscosity ranges. To the main assets of this series belong low pulsation, high precision low volume dosage of non-lubricating liquids, compact design with smallest dimensions and low price.
These pumps are suitable for dosing and dispensing deionized water, aqueous solutions, solvents as well as low to highly viscous oils, lubricants or dyes.


  • Compact dimensions
    length 132 mm
  • High dosage precision
    precision CV 1 % at low volumes
  • Small dosage volumes, high flow rates
    smallest volume 30 µl, flow up to 288 ml/min
  • Long service life
    wear-resistant tungsten carbide
  • Low pulsation delivery, low shear stress
    rotary micro annular gear technology
  • Analytical instrumentation
  • Fuel cells
  • Biotechnology
  • Laboratory automation
  • In vitro diagnostics
Flow rate 4.8 – 288 ml/min
Viscosity range 0.3 – 100 mPas
Precision CV 1 % (Coefficient of Variation CV)
Velocity range 100 – 6000 rpm
Fluid connection 1/8" NPT internal thread, lateral
Wetted parts Pump case: stainless steel 316L, rotors: tungsten carbide Ni-based; bearing: ceramics; epoxy resin; shaft seal: graphite-reinforced PTFE, stainless steel 316L; static seals: FPM, optional: EPDM, FFPM
Motor DC-motor with graphite brushes, assigned power rating 21 W, nominal voltage 12 V, digital optical encoder 256 counts per turn, Line Driver
Dimensions (L x W x H) approx. 132 x 42 x 60 mm
Weight approx. 800 g
Differential pressure range 0 – 5 bar (73 psi)
Maximum inlet pressure 1 bar
Operating temperature range -20 ... +60 °C
Displacement volume 48 µl
Smallest dosage volume 30 µl
Remark * Customized solutions on request

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.

File Language Size
Manual mzr-7242
Manual mzr-7242 (2.1 MB)
Betriebsanleitung mzr-7242 (2.9 MB)
2.1 MB
Micro annular gear pump mzr-7242
Micro annular gear pump mzr-7242 (321 KB)
Mikrozahnringpumpe mzr-7242 (326 KB)
321 KB