Stable Micro Systems Ltd. use the test frame and vertical drive system provided by a universal Texture Analyser, and add the rotational drive and software functionality to form the Powder Flow Analyser - an accurate and reliable method of measuring the flow characteristics of powders.

Powder Flow Analysers can be purchased as completely new working systems, or you can take your existing Texture Analyser and attach the Powder Flow Analyser to extend your range of testing solutions from powders to end products.

A patented helically machined rotor can be programmed to move through a powder column in different ways, depending upon the characteristic that is to be measured. Due to the unique precision profile of the rotor's blade, the sample can be physically displaced in many different ways. The Test Settings of blade path angle and tip speed determine the mode of Controlled Flow achieved within a sample column.

During the test, axial force, time and distance are measured by a sensitive transducer and data is displayed and analysed in real time by Exponent software. Sample results can be ranked and compared to assess the impact of external conditions including humidity and moisture content, surface properties, electrostatic charge and particle or granule size, shape and distribution. Manufacturers can assess and avoid typical problems such as batch and source variation of ingredients, caking during storage or transportation and problems with discharging from hoppers or bins.

Once programmed, the optimised test can provide identical controlled flow conditions when completing the same test programme. Test Settings can be optimised to show the maximum differentiation between similar products, or to imitate the process or storage handling conditions, experienced by the product.

The Powder Flow Analyser is supplied with library tests, so operators can start testing quickly and conveniently after straightforward installation and calibration. Users can, however, fully program the instrument to carry out slicing, shearing, compressing, compacting and aerating cycles in any combination.

Powder Flow Analyser


Why measure the flow properties of powders?



It is estimated that over 50% of all materials used in all industries are, at some stage, in powder form.

An objective measure of powder and granule flow can:

  • Allow customers to avoid the extensive costs and time involved in unloading powders that will not flow out of storage containers

  • Help achieve the best product formulation with the properties to suit the requirements
  • Improve the quality and consistency of the product
  • Save costs by optimising storage, packing, handling and transportation


Instrument Specification: Measurement and Control

Powder Flow Analyser
The Powder Flow Analyser
Feature Value Note
Force Down 5kg (50N) max.  ± 0.05%
Force Up 5kg (50N) max.  ± 0.05%
Force Zero
< ± 0.1g
Rotor Blade
48mm dia.
Tip Speed
Dependent on
Test Angle
0°: 0-754mm/sec
(limit of 300rpm)
XT2i: 0- 10mm/sec
XTplus: 0 to 40mm/sec
Rotor Blade
23mm dia.
Tip Speed
Dependent on
Test Angle
0°: 0-360mm/sec
XT2i: 0- 10mm/sec
XTplus: 0 to 40mm/sec
Rotor Blade
Speed Control
Better than 0.05%
Data Acquisition Force, Distance, Time Up to 500 data points
per sec per channel
(16 bit accuracy)
Operating Conditions Dust and Splash
Power Supply 90V - 264V AC
47Hz - 63 Hz




 vessels-x3-2 TEST VESSELSPrecision tube in borosilicate glass with removable acetal base attachment ring to enable easy cleaning. Vertical alignment and radial tolerance better than
± 0.05mm. Special materials and sizes on request.Vessels are supplied individually or in sets of 3 and are available in 2 sizes:

  • Typical sample volume 100-200ml: 50mm internal diameter: 130mm total height
  • Typical sample volume 20-35ml: 255mm internal diameter: 80mm total height

 blades-on-blue2 ROTORSShafts: 6mm diameter 316 Stainless Steel.Blades: precision machined to optimise blade form. Over Anodised (Clear) Aluminium Alloy or 316 Stainless Steel as standard. Sspecial materials and sizes on request.Rotor blades are available in 2 sizes:

  • 3 mm diameter: 10mm height
  • 8mm diameter: 10mm height
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