Testers and software for powders and bulk solids

Powder flow testers and related software since more than 30 years.

Our testers help you to measure flow properties incl. flowability of powders and bulk solids, and to understand powder flow, how to avoid flow problems or segregation in hoppers, bins and other equipment, how powders can be compared and optimized with respect to flowability, and how cohesion, strength, caking and wall friction are determining the powder's behavior. Applications can be found in the pharmaceutical, chemical and food industries, as well as in battery technology, metallurgy, 3D printing and, of course, silo design.

Applications can be found in pharmaceutical, chemical, food industry as well as in battery technology, metallurgy, 3D printing, and, of course, silo design.

Our major products

... are Ring Shear Testers (automatic, computer-controlled testers for powder flow analysis, i.e. measurement of flow properties like the flow function, strength, internal friction, wall friction, time consolidation "caking", flowability coefficient) and software for hopper design for flow (following the great work of Andrew W. Jenike).

News and Info

Large Ring Shear Tester

The RST Mk II ring shear tester (image above) is our largest ring shear tester. It offers the widest range of applications in terms of different particle sizes (up to 10 mm max. particle size for wide distributions). The device is upward compatible with its successful predecessor, the RST-01.pc (e.g., use of the same shear cells), but is slightly smaller and lighter.

With the tester, the new software RST-CONTROL v3 is delivered.

RST-Mk II

Small Ring Shear Tester RST-XS.s

The "small" automatic, digitally controlled Ring Shear Tester RST-XS.s for the measurement of flow properties of powders (flowability, caking, wall friction). Automatic, computer-controlled powder testing procedure. Very small specimen volume (standard: only about 30 ml, smallest approx. 3.5 ml).

CAHD - Software for silo design for flow

CAHD: Computer-aided Hopper Design.
An interactive software doing the common calculations according to A. W. Jenike's theory and, if desired, also according to other approaches: Hopper slope for mass flow (diameter-dependent), outlet dimensions to avoid arching and ratholing. The entire process is user-controlled and transparent: Diagrams and extrapolations are finally presented in a comprehensive document.

Small volume shear cell XS-Sr

The shear cell type XS-Sr for Ring Shear Testers RST-XS.s and RST-XS with only 10 ml specimen volume is provided with a lid and bottom ring design similar to the larger shear cells XS-Mr and XS-Lr.

Shear cell and driving axle with reduced heat transfer

This new accessory for the Ring Shear Tester RST-XS.s design supports tests at temperatures deviating from room temperature (reduced heat transfer, increased heat capacity).

Optimized design of shear cells for large ring shear testers RST-01.pc and RST Mk II

A new generation of shear cells for the large ring shear tester RST-01.pc and its successor RST Mk II offers advantages in terms of cleaning and handling. Available with a sample volume of 900 ml, 200 ml and 48 ml.