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The preeflow eco-PEN is a precision volumetric, positive displacement, dosing/dispensing system that gives you accuracy and repeatability by means of a rotor which turns inside a stator. The preeflow eco-PEN uses a progressive cavity pump principle which doses and dispenses a wide range of material viscosities with no stress to the material, and absolute control.


We can integrate the preeflow eco-PEN into any robotic dispensing system. The preeflow eco-PEN delivers optimum results when used with Micron-S Precision Nozzles.

Features & Benefits

  • Precise, process-stable dosing as small as 0.001ml (1μl)
  • Accuracy of ±1%, >99% of the time
  • Gentle product dosing process
  • Linearly proportional control characteristics
  • Wide control and application range
  • Controlled reverse flow and clean product break
  • Easy system integration


  • Electronics packaging
  • Semiconductor
  • Medical
  • Biological chemistry
  • Laboratory
  • Photovoltaic
  • Optics and photonics


preeflow dispensing system preeflow EC200-B control unit

The eco-CONTROL EC200 control system provides total control of the dispensing process. It is designed for either benchtop or rack mounted location, dependent on the model.

Operating principle
The unit is microprocessor-controlled. It is simple to operate, without submenu, and has graphic support. External signals can be connected via I/O ports to a PLC for control in automated lines. A wide variety of dosing programs with part management can be stored.

The supply pressure (with pressure sensor kit) is monitored and can be displayed digitally in bar or psi.

Error messages for filling level and motor current are also monitored (an RS232 interface is provided).

It is possible to control two eco-PEN precision-volume dosing units (as a factory-fit option).


  • Quantity program
  • Start/stop program
  • Time program
  • Teach IN function (external and navi)
  • Set-volume readout in g or ml
  • Dosing flow readout in ml/min and g/min
  • Storage of dosing programs with part management
  • Set pressure / actual pressure reading in bar/psi

Selector Guide

preeflow eco-PEN selector guide
The new eco-PEN precision-volume dosing unit covers many applications from the lowest to the highest material viscosities, where the highest volumetric accuracy is required.
Dot-dosing, bead application with dispensing rate adjustable to the run speed, encapsulation
preeflow ecoPEN 450 dispenser diagram
Model Smallest dose Adjustable flow rate Weight
eco-PEN300 0.001 ml (1μl) 0.12 – 1.48 ml/min 380g
eco-PEN330 0.002 ml (2μl) 0.2 – 3.30 ml/min 410g
eco-PEN450 0.004 ml (4μl) 0.5 – 6.00 ml/min 410g
eco-PEN600 0.015 ml (15μl) 1.4 – 16.00 ml/min 750g
eco-PEN700 0.060 ml (60μl) 5.3 – 60.00 ml/min 750g
For two part formulations
0.005 ml (5μl) 0.1 to 6.6 ml/min 1100g
For two part formulations
0.010 ml (10μl) 0.2 – 12.00 ml/min 1100g
For two part formulations
0.030 ml (30μl) 0.6 – 32.00 ml/min 1600g

Other Information

Cartridge adapter

For applications where the material is supplied in syringe barrels, an optional cartridge adapter with an integrated ventilation system allows for direct dispensing from the syringe. With a 1/8 inch external thread, the adapter is ideally suited for the eco-PEN and eco-DUO series 300, 330 and 450. With the help of a reducer the adapter can also be used with the 600 and 700 series.

Cartridge adapter for preeflow eco-PENs

Made of black anodized aluminium and stainless steel, and FFKM sealing elements, the cartridge adapter is compatible with almost all materials. By means of a standardized Luer-lock connection (1), the material cartridge can be quickly attached to the adapter. The adapter itself can be turned by 360° without resistance until the final lock with the help of the hexagon screw (2), and thus allows the user a maximum degree of mobility and flexibility. With the aid of a small piece of hose (Øi 4mm) which is plugged onto the hose nipple (3) and by opening the bleed screw (4), the air can escape from the pump housing and any excess material can be quickly and cleanly disposed of together with the hose piece. In this way, air bubble-free dispensing can continue even after several cartridge changes.

Self-sealing rotor/stator design

See also our Technical Articles and White papers page to download “The “Endless Piston” Pump – Technology for Precision Dispensing” – a whitepaper about this technology.

See the preeflow eco-PEN as part of a real application in these dispensing and robotics Case Studies:

Case Study F4300N.1 preeflow eco-PEN GJD Manufacturing Automated dispensing helps security manufacturer increase throughput and quality

GJD Manufacturing switched to an automated method of dispensing silicone for sealing a plastic lens to aluminium housing. By doing this, they improved the throughput and quality of their white-light and infra-red LED illuminators for the security industry.

Case Study F4200N preeflow eco-pen Parkinson Harness Technology Precision dispensing helps electrical manufacturer to reduce waste by improving quality and yield

By switching to an automated dispensing system, this electrical manufacturer reduced scrappage and therefore improved quality and yield of their product.

Ordering Information

Part number Description
VIS20505 preeflow eco-PEN300
VIS21529 preeflow eco-PEN330
VIS20092 preeflow eco-PEN450
VIS20048 preeflow eco-PEN600
VIS20723 preeflow eco-PEN700
VIS21529 preeflow eco-DUO330
VIS20081 preeflow eco-DUO450
VIS20048 preeflow eco-DUO600
VIS20120 preeflow eco-CONTROL EC200-K desktop unit
VIS20121 preeflow eco-CONTROL EC200-B built in/rack-mounted unit
VIS20143 preeflow eco-PEN stand
VIS20145 preeflow holder for eco-PEN 300/450
VIS21750 Cartridge/syringe adapter for eco-PEN and eco-DUO 300/330/450
VIS21811 Cartridge/syringe adapter with vent valve

All Downloads

Filename Size Download
Preeflow Microdispensing Brochure 2018 1.99MB
The Endless Piston Pump Technology for Precision Dispensing 0.35MB
Automated dispensing helps security manufacturer increase throughput and quality 1.12MB
  • Last updated: November 2019
  • Version: 6.1

Statements, technical information and recommendations contained herein are based on tests we believe to be reliable but they are not to be construed in any manner as warrantees expressed or implied. The user shall determine the suitability of the product for his intended use and the user assumes all risk and liability whatsoever in connection therewith.