HNPM mzr-2909 Ex

Max Capacity: 14 ml/min

Max Pressure: 5 bar

Max Viscosity: 5000 mPas

Temperature Range: -5 to +40 °C

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HNPM mzr-2909 Ex Micro Annular Gear Pump from HNP Mikrosysteme for Chemical and Process Technology is Atex ready pump for micro dosing fluids in a broad range of viscosities for use in both continuous and discrete dosing of liquids. 

HNP Mikrosyteme High Dosing Precision, Long Life and Wear Resistant Micro Annular Gear Pump mzr-2909 Ex for low volume dosage of non-lubricating liquids of large range of viscosties, pumping water, solvents, grease, gel, adhesives and more.

HNP Mikrosysteme micro annular gear pump mzr-2909 Ex covers the flow range 0.003 – 14 ml/min.

The HNP Mikrosysteme mzr-2909 Ex micro annular gear pump is a highly precise, low pulsation small volume dosage even of non-lubricating liquids or at high pressure, the compact design of this Ex-pump, the broad viscosity range and the small measurements are unique features of this pump series. The pumps are applied in the field of chemical and process technology and are suitable for both continuous delivery and discrete dosage of watery solutions, solvents, oil and other viscous liquids. Accessories extending the operating parameters of the device are available.

Advantages of the HNP Mikrosysteme mzr-2909 Ex Atex Ready pump.

  • Ex-certification ATEX – conform with EU Directive 2014/34/EU
  • High dosage precision – precision CV < 1 % at low volumes
  • Compact dimensions length < 295 mm, including Ex-motor
  • Broad viscosity range – methanol, solvents, adhesives, grease, gel
  • Long service life – wear-resistant tungsten carbide
  • Low pulsation delivery, low shear stress – rotary micro annular gear technology


Ambient temperature range

0 … +40 °C

Flow rate

0.0015 – 7 ml/min

Viscosity range

0.3 – 5,000 mPas

Precision CV

< 1 %

Velocity range

1 – 4700 rpm

Wetted parts

stainless steel 316L (1.4404, 1.4435), tungsten carbide Ni-based; shaft seal: graphite-reinforced PTFE, 316L static seals: FPM, optional: EPDM, FFPM


DC-motor, 24 V DC, 2 A, 53 W, encoder: 500 counts per turn, type HEDL 5540

Cable length

10 m


approx. 2,500 g


CE II 2G c T5 X

Place of installation

Ex area zone 1, 2

Differential pressure range

0 – 5 bar (73 psi)

Maximum inlet pressure

5 bar (73 psi), (10 bar (145) *)

Operating temperature range

-5 … +40 °C

Displacement volume

1.5 µl

Smallest dosage volume

0.25 µl


* with optional fluidic seal module,
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.



Accessories for the ATEX Micro Annular Gear Pump from HNP Mikrosysteme mzr-2909 Ex

for micro annular gear pumps mzr-xx09 Ex and mzr-xx59 Ex,

programmable controller for continuous and discrete dosing


Heat insulation module

thermal insulation of pump head and drive for high performance and hermetic inert pump series, 

also available in ATEX


Fluidic seal module

additional sealing system for handling liquids sensitive to air or moisture and for vacuum applications of pumps from the high performance series


Double shell heating module

double shell for active heating or cooling of pump heads from the high performance and hermetic inert series,

thermal insulation of pump head and drive,

prevents temperature drop of liquid


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