Uniaxial Powder Tester


Freeman Technology

Freeman Technology

The Uniaxial Powder Tester (UPT) is a stand-alone uniaxial shear tester for simple, sensitive and cost effective powder characterisation. The instrument delivers repeatable and reliable measurements, providing a robust alternative to traditional powder testing techniques. Uniaxial testing first involves the construction of a consolidated powder column. This is then removed from its confining sleeve before being fractured through the application of a vertical stress, directly measuring the uniaxial Unconfined Yield Strength (uUYS). This technique can therefore be used to assess and rank powder flowability. Cohesive powders have relatively strong inter-particular forces, which encourage the particles to bond together rather than moving easily relative to one another. By contrast, in non-cohesive powders, the tensile forces between particles tend to be much weaker. Uniaxial powder testing is a direct and reliable method for measuring the uUYS and Flow Function of powders.

Key Differences

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Benefits of the Uniaxial Powder Tester:

  • Direct uUYS (σc) and Flow Function (FF) measurements

  • Fast

  • Repeatable

  • Low Cost

  • Versatile

  • Easy to use

  • Intuitive, easy to interpret results

  • Robust

  • Bespoke software 

Technical Specification

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The UPT's level of automation and low operator input means the instrument delivers highly repeatable data. 

  • Uniaxial Consolidation Stress Range: 0-100kPa

  • Normal stress - resolution : 0/3 Pa

  • Double ended consolidation : +

  • Uniaxial unconfined yield strength (uUYS) - measurement: +

  • Real time stress display/ Piston position display: +

  • Sample mass- measurement: +

  • Compressibility(%): +

  • Height / Diameter ratio of consolidated sample: 1.25-1.5

  • Data logging:+

  • Data export: +

  • Report generation: +

  • Instrument Dimensions: 310x321x647mm

Uniaxial Powder Tester


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