HNPM mzr-4622

Max Capacity: 72 ml/min

Max Pressure: 5 bar

Max Viscosity: 1000 mPas

Temperature Range: -20 to +60 °C 

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HNP Mikrosysteme HNPM mzr-4622 Micro annular gear pump. Low pressure pump series supplied by Thomson Process Equipment and Engineering Ltd.

The HNP Mikrosysteme mzr-4622 is a low pressure series pump. This High Precision, Low Shear, Low Pulsation compact micro annular gear pump is an innovative pump concept for use in analytical instrumentation, fuel cells, in vitro diagnostics and labratory automation.

The HNPM mzr-4622 pump generates a low pulsation, highly precise flow featuring low shear stress. It dispenses at a high precision the lowest volumes in microliter range. Due to its compact design small dimensions have been achieved. The pump is suitable for dosage of low viscosity liquids such as deionized water, watery solutions, methanol, solvents, oil and lubricants.


Advantages of the HNPM mzr-4622 Low Pressure Series Pump

  • Compact dimensions – diameter 16 mm, length 88 mm
  • 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
  • Long service life -wear-resistant tungsten carbide
  • Low pulsation delivery, low shear stress -rotary micro annular gear technology

Applications for the HNPM mzr-4622 Low Pressure Series Pump

  • Analytical instrumentation
  • Fuel cells
  • Laboratory automation
  • In vitro diagnostics


Flow rate

1.2 – 72 ml/min (min. 0.012 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

stainless steel 316L, ceramics, tungsten carbide Ni-based, epoxy resin; shaft seal: graphite-reinforced PTFE, stainless steel 316L;
static seals: FPM, optional: EPDM, FFPM


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 88 mm


approx. 100 g

Electrical connection

10-pole connector

Differential pressure range

0 – 5 bar (73 psi)

Maximum inlet pressure

1 bar

Operating temperature range

-20 … +60 °C

Displacement volume

12 µl

Smallest dosage volume

2 µl


* 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 Thomson Process Equipment and Engineering who are the Irish Agent for HNP Mikrosysteme. Actual performance may vary.
Specifications are subject to change without notice.



HNPM mzr-4622 Low Pressure Pump Accessories

Reduction gear

reduction gear unit,

reduces pump speed,

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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