Micromeritics FT4 Powder Rheometer

The Micromeritics the FT4 a universal powder tester and by far the most versatile instrument for measuring and understanding powder behaviour.

Micromeritics FT4 Powder Rheometer

The Micromeritics the FT4 a universal powder tester and by far the most versatile instrument for measuring and understanding powder behaviour.

Manufacturer Micromeritics
Product Series Micromeritics Rheometer
Measurement principle Powder Rheometry
Application Density, pore size and volume, Rheology And Viscosity, Surface Area & Porosity

Product Overview

The FT4 Powder Rheometer is a universal powder flow tester for measuring powder flow properties and powder behaviour.

It offers benefits that remain unmatched by similar systems. These include:

  • The ability to simulate powder processing conditions, by testing samples in a consolidated, moderately stressed, aerated or fluidised state.
  • The application of multi-faceted powder characterisation to assess dynamic flow, bulk and shear properties to construct the most comprehensive understanding of how a powder behaves.
  • Unparalleled sensitivity, enabling the differentiation of powders that other testers classify as identical.

A powder’s resistance to flow is measured whilst the powder is in motion. A precision ‘blade’ is rotated and moved downwards through the powder. This causes many thousands of particles to interact. The resistance experienced by the blade represents the difficulty of this relative particle movement, or the bulk flow properties. The more difficult it is to move the blade, the more the particles resist motion and the harder it is to get the powder to flow. Excellent reproducibility is achieved by moving the blade in a precise and repeatable way. The advanced control systems of the FT4 accurately set the rotational and vertical speeds of the blade, which defines the Helix Angle and Tip Speed.

The FT4 also includes a shear cell for measuring the powder’s shear strength, a wall friction kit in order to quantify how the powder shears against the wall of the process equipment (in accordance with ASTM standard D7891), plus accessories for measuring bulk properties, such as density, compressibility and permeability.

The Powder Rheometer control software is intuitive and easy to use, guiding the operator through a wizard style interface to ensure sample analysis is uncomplicated.

Whether your objective is to optimise a formulation in a development environment, predict in-process performance, understand batch differences, or to ensure the quality of raw material or intermediates, the FT4 will provide valuable and unique information that will help you address your challenges.

  • Demonstration video
  • Accessories

Demonstration video


  • Fully automated test programs and data analysis
  • Conditioning mode provides unparalleled repeatability
  • Range of sample size, 10ml to 160ml (in addition a 1ml Shear Cell is available) 


The FT4 has application in all powder processing industries, including Pharmaceuticals, Fine Chemicals, Food, Cosmetics, Toners, Metals, Ceramics, Plastics, Powder Coatings, Cements and Additive Manufacturing. Applications extend to:

  • Die / Capsule Filling
  • Tablet Compression 
  • Hopper Flow
  • Wet Granulation End Point & Scale Up
  • Flow Additive Selection & Optimisation 
  • Humidity Effects
  • Electrostatic Charge
  • Mixing / Blending
  • Feeding
  • Segregation 
  • Attrition
  • Dry Powder Inhalers
  • Caking
  • Milling
  • Conveying 
  • Wall Friction & Adhesion
  • Hopper Design
  • Compact Hardness & Payoff
  • Vacuum Filling
  • Agglomeration 


A full range of accessories is available for the FT4, including standard vessel sizes allowing sample volumes in the range 10ml to 160ml to be analysed. In addition, the 1ml Shear Cell can be selected when only very limited samples sizes are available. Further accessories include compaction pistons, shear heads, wall friction kits, an aeration control unit and a uniaxial tester. A calibration standard powder is also available, if required. For a full list of available accessories, please contact us.

Product Enquiry


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