HNPM mzr-2942

Max Capacity: 18 ml/min

Max Pressure: 3 bar

Max Viscosity: 1000 mPas

Temperature Range: -20 to +60 °C

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HNPM mzr-2942 Micro Gear Pump for dispensing and metering aggressive corrosive liquids. 

The micro annular gear pump mzr-2942 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 technology


Flow rate 0.3 – 18 ml/min (min. 0.003 ml/min *)
Viscosity range 0.3 – 100 mPas (max. 1,000 mPas *)
Precision CV 1 % (Coefficient of Variation CV)
Velocity range 100 – 6000 rpm (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
Dimensions (L x W x H) Ø 18 mm, length 90 mm
Weight 65 g
Electrical connection 10-pole connector
Differential pressure range 0 – 3 bar
Maximum inlet pressure 1 bar
Operating temperature range -20 … +60 °C
Displacement volume 3 µl
Smallest dosage volume 0.5 µl
Remark * depending on accessories,

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.




Reduction gear

reduction gear unit,

reduces pump speed, increases the torque of the drive. 

stabilizes motor speed in low RPM-range, increases drive torque

Programmable controller S-ND

for micro annular gear pumps from the low pressure series and mzr-xx42,

programmable controller for continuous and discrete dosing

Controller S-KG

for micro annular gear pumps from the low pressure series and mzr-xx42,

4-Q-DC controller for continuous dosing


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