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LMI5500 Series

With an array of features and benefits ranging from ground-breaking accuracy to unified software between all laboratory and online production equipment, the LMI5500 is incredibly advanced and designed just for the thermoplastics resin industry. The LMI5500 brings a new level of ease of use with its removable inspection plate, increased access for sample cutting, and improved touch screen. It is capable of delivering a wide range of data for melt flow rate, shear stress, shear rate, apparent viscosity, instinsic viscosity, melt density, and testing conditions.

Dont forget- our LMI5500 is IoT enabled.  The IoT native software of the LMI5500 allows for real-time access to your testing information.With the Dynisco Cloud Connect Subscription, you get comprehensive access of rheological data, correlations, and dashboards.  This interface allows for a complete “Window into the Process” providing valuable insight to your polymer process.

Try our 90 day demo trial at no cost to see first hand how the aggregation of data can enable insights providing a window into your process. 


  • Gravitational correction
  • New Windows 10 loT touch screen native interface
  • Built in WIFI and ethernet
  • HDMI and multiple USB ports
  • Direct digital scale USB interface for sample weighing
  • Performance meets international standards: ASTM D1238 & D3364, ISO 1133-1 & ISO 1133-2, BS2782, DIN 53735, JIS K7210
  • Automatic sample cutter for ease and consistency in sample cutting
  • Melt Flow Rate to Intrinsic Viscosity correlation for PET
  • Nearly unlimited program storage capability 
  • Increased access to the die for sample cuttingwith a strategically placed mirror to easily view the die and cutting area
  • Supports multiple languages


Dynisco Product Portfolio

From breakthrough technology in the industry’s most complete line of sensors to renowned quality and performance in indicators, controls, and analytical instruments Dynisco has demonstrated the skill, experience and know-how that not only deliver the right solution for your unique application, but also provide unparalleled customer support.


LMI Melt Flow Rate Test: Applications and Calculations


To provide explanation and education of relevant ASTM test methods for obtaining Melt Flow Rate (MFR) Melt Volume Rate (MVR) and Melt Density (MD) of polymers, which will include comprehensive training on the set up, interface, operation, and general maintenance of the equipment.


How Dynisco is Remolding the Plastics Industry Podcast

In this episode, Microsoft's podcast hosts Deb Oberly and Dani Diaz talk with John Biagioni, President of Dynisco, who is bringing our vision of "rheology to the masses" to fruition with trailblazing cloud solutions for the plastics industry. Learn about the details of our industry and company, the surprises and insights of our journey crafting their IoT solutions, the immense value of the data we are collecting and our deliberate approach for continued success in this space.


LMI5500 Instruction Manual

Operating Manual for the LMI5500 Melt Flow Indexer

Product Videos

ASTM/ISO Method A Test Using the Dynisco LMI5500 Melt Flow Indexer

Dynisco IoT Cloud Connect: There For You 24/7 When You Can't Be

We are living in rapidly changing times. The entire world is working differently then we ever have in the history of manufacturing.Learn how the Dynisco IoT Cloud Connect and other support systems can help processors manage and monitor their production lines remotely

Dynisco Online Shop Overview

Dynisco’s Online Shop is where you can have access to ordering all Dynisco parts from Polymer Testing Equipment to Sensors to accessories- all to optimize your application.

Relevant Articles

Melt Flow Testing Article Part 1

Though often criticized, MFR is a very good gauge of the relative average molecular weight of the polymer. Since molecular weight (MW) is the driving force behind performance in polymers, it turns out to be a very useful number.

Melt Flow Testing Article Part 2

To fully appreciate the strengths and weaknesses of the melt-flow-rate (MFR) test it is important to know something about the way the test is performed.

Melt Flow Testing Article Part 3

There is a well-established relationship between something called the weight average molecular weight of a polymer and a parameter known as the zero-shear viscosity.

Melt Flow Testing Article Part 4

Few molders perform the test in-house. Of those that do, most don't understand why they are doing it or what they are measuring.

Melt Flow Testing Article Part 5

There are two points in the manufacturing supply chain where a determination of average molecular weight (MW) is important. The first is when the material is first received by the molder. The second is after molding.

Melt Flow Testing Article Part 6

Once degradation has been established, the discussion inevitably turns to how it happened. It might be expected that the answer to this question is widely known. Not so. The good news is that the influences that cause polymer degradation during processing are few.

Melt Flow Testing Article Part 7

Here is why the melt flow test is not universal. As useful as the melt flow rate (MFR) test can be, it is not universally applicable. Fundamentally, the test is intended to document differences in molecular weight.

Melt Flow Testing Article Part 8

Here are the steps to take in cases where the MFR is not provided by the polymer supplier. The number of commercial materials that employ a melt flow rate (MFR) value as part of the published property profile attests tO the usefulness of the test.

Melt Flow Testing Article Part 9

Understanding the value of melt-volume rate. If you spend a lot of time looking at data sheets you have probably noticed a trend over the last several years in how the melt flow rate (MFR) is reported. Along with, or instead of, the MFR, a new line item is appearing called the melt volume rate (MVR).

Service Solutions

Dynisco Service Solutions

Dynisco has an extensive worldwide network of experts with thousands of years of combined pressure and application experience whose mission is to partner with you to optimize your system, solve problems and keep your operations efficient and cost-effective.

Have A Question? Ask a Dynisco expert for more information.

  • Dynisco

    38 Forge Parkway,
    Franklin MA 02038

    +1 508 541 9400  

  • Dynisco Europe GmbH

    Pfaffenstr. 21, 74078,
    Heilbronn, Germany

    +49 7131 297 0

  • Dynisco-Viatran Instrument Sdn Bhd

    Lot 3615, Jalan SM 6/8
    32040 Seri Manjung, Perak, Malaysia

    +605 6884014