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Mflow Extrusion Plastometer

The modular one Download
Test methods
  • MFR
  • MVR
  • Method A
  • Method B
Test volume
  • Average
  • Universal

Mflow - the Modular One

The basic version of the Mflow extrusion plastometers can be used to determine melt mass flow rates (MFR).

It features a modular design, and use of the piston displacement transducer expands the Mflow’s capabilities to include determination of melt volume flow rate (MVR), as well as automatic, field-dependent parameterization. These extrusion plastometers are typically used for quality assurance and incoming goods inspections.

The basic version of the Mflow extrusion plastometer is designed for MFR tests according to method A and can be expanded for MVR tests according to method B. Tests can be performed according to the following standards: Method A and B to ISO 1133, ASTM D1238, ASTM D3364, JIS K 7210.

Video: Mflow extrusion plastometer with weight pegging device

The Mflow’s weight pegging device option combines the advantages of pneumatic weight lifting and the convenience of easy and safe changes of test weights. This ensures safe storage of the weights and an ergonomic test sequence.

Advantages & Features

Advantages & Features

Reliable Test Results
Intuitive and workflow oriented touch operation
Saving space when testing with multiple instruments

Reliable Test Results

A precision piston transducer ensures accurate measurement of piston stroke when determining MVR. The contact point is very close to the piston, minimizing possible angle errors from the outset. The accuracy with which the flow rate is determined in Method B depends on the synchronization of the time-travel data pairs and on the accuracy of the time determination. As both measured quantities (time and travel) are available in digital form from the outset, there is no need for analog to digital conversion. This also eliminates synchronization errors. Quartz accurate time measurement also enables measurement of materials with high flow-rates.


Intuitive and workflow oriented touch operation

  • The new standardized operating philosophy allows the operator to move easily between the instrument and the PC.
  • All test-related settings are grouped logically and are separated from higher-level system settings. The operator is guided through the test configuration step by step. The saved test configuration can be easily exported and transferred to other instruments.
  • Integrated user management reduces the number of operator input options to a minimum. Users see only what is important to them so they can focus on the task at hand right from the start.
  • The MVR is shown live in graphic form, in both stand-alone mode and in the ZwickRoell testing software. This allows both melting process and behavior to be followed precisely during measurement.

Saving space when testing with multiple instruments

In labs with multiple instruments, testXpert III makes it possible to configure and control up to six Aflow and/or Mflow extrusion plastometers with one PC. Central operation and the saving of results from a single workplace is rational and affords a quick overview of all tests currently in progress. For a clear overview of operations, we recommend using two monitors.

The benefits of operating an extrusion plastometer with testXpert III are:

  • Automatic bubble detection that prevents measurement errors caused by air inclusions by detecting them in the plastic melt
  • Live display of the melt volume rate that follows the progress of melting and the behavior during measurement and graphically or numerically displays the test piston speed when the test starts in cm³ per 10 min. or in g per 10 min. when the melt density is preselected

Mflow technical data

Related Products and Accessories

Additional information

MFR/ MVR plastics
ASTM D1238, ASTM D3364
Determination of melt mass-flow rate (MFR), melt volume-flow rate (MVR), flow rate ratio (FRR)
to MFR/ MVR plastics
Melt flow index test plastics
ISO 1133-1, ISO 1133-2
Determination of melt mass-flow rate (MFR or MFI), melt volume-flow rate (MVR)
to Melt flow index test plastics
Determination of MFR & MVR of plastic pipes
ISO 1133-1, ISO 1133-2, ASTM D1238
to Determination of MFR & MVR of plastic pipes

Interesting customer projects


Name Type Size Download
  • Product brochure: Extrusion plastometers PDF 3 MB
  • Product information: Mflow extrusion plastometer PDF 127 KB