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Products Information

Micro-volume dispensing screw pump eco-PEN 300/450/600

The eco-PEN 300/450/600, developed by ViscoTec, is a new and innovative constant-volume volumetric dispenser, suitable for micro-volume dispensing of low to medium viscosity liquids in diverse applications.

  • Highly accurate micro-volume volumetric dispensing, free of the influence of change in viscosity
  • Stable dispensing independent of the initial pressure as well as excellent pressure tightness that eliminates the need for valves
  • Suck-back effect reliably stops liquids at the end of dispensing. It prevents liquids from dripping, resulting in excellent finish to pattern drawing.
  • Simple structure and easy maintenance
Micro-volume dispensing screw pump eco-PEN 300/450/600


  eco-PEN300 eco-PEN450 eco-PEN600
Feeding unit Luer Lock (patented) with O-ring

Input pressure

0 to 0.6 MPa (Non-thixotropic liquid)
Maximum dosing pressure 1.6 to 2.0 MPa
Specific air-tightness *1 Approx. 0.2 MPa
(Reference media: Approx. 10 mPa•s/20ºC)
Wet component HD-POM/Stainless
Sealing High polymer PE, VisChem
Fixed sealing O-ring (FKM for liquid seal, NBR for dust seal)
Motor 18 to 24 VDC (with encoder)
Dosing rate 0.012 ml/rotation 0.05ml/rotation 0.14ml/rotation
Dosing accuracy *2 ±1%
Repeatability 99% or higher
Minimum dosage 0.001ml 0.004ml 0.015ml
Volume flow rate *3 0.12 to 1.48 ml/min. 0.5 to 6.0 ml/min. 1.4 to 16.0 ml/min.
Weight 280g 300g 650g

*1: Maximum dosing pressure and specific air-tightness vary in proportion to the change in viscosity. Check on the manufacturer’s recommended values.
*2: Volumetric dosage dispensed as an absolute deviation per dispenser rotation. It varies according to the viscosity of medium to dose.
*3: Volume flow rate varies according to the viscosity and initial pressure.

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