In the table the most important capabilities and applications of our Ring Shear Testers are listed in order to provide a comparison of when to use each tester. In addition, you can check whether there is any other powder tester on the market, which provides the same wide area of application as our Ring Shear Testers.
| capability / application | RST-XS.s | RST-XS | RST-01.pc | RST-01.01 | other testers | |
| # 1 | # 2 | |||||
| The device is a real shear tester (shear testers are the standard testers in powder technology!). | yes | yes | yes | yes | ||
| Measurement of device-independent, well-defined physical properties like unconfined yield strength, internal friction, etc. | yes | yes | yes | yes | ||
| Measurement of yield loci with the parameters consolidation stress, unconfined yield strength, internal friction, bulk density, flowability, etc. | yes | yes | yes | yes | ||
| Measurement of time consolidation (time yield loci), also known as "caking", with the possibility of long term consolidation of several samples simultaneously (with optional consolidation benches). | yes | yes | yes | yes | ||
| Measurement of wall friction (wall yield loci). | yes | yes | yes | yes | ||
| Measurement of compressibilty (bulk density in dependence on consolidation stress). | yes | yes | yes | yes | ||
| Testing attrition of granules, flakes, and pellets | no | no | yes | yes | ||
| "Stress Walk": Measures up top ten points of the flow function on one specimen (for quick assessment of the flow behavior over a wide range of stresses) | yes | no | no | no | ||
| Operator-controlled test (test procedure is determined by the operator) | yes | no | no | yes | ||
| Variable stress level (stress level adaptable to the application under consideration). | yes | yes | yes | yes | ||
| Caking tests (time consolidation) with long-term storage of multiple specimens simultaneously (by use of time consolidation benches) | yes | yes | yes | yes | ||
| Measurement also at small normal stresses (down to about 200 Pa). | yes | yes | yes | yes | ||
| Measurement also at very small normal stresses (down to about 50 Pa). | yes | no | yes | yes | ||
| Shear cells of different dimensions (e.g. small cells if only small powder samples are available). | yes | yes | yes | yes | ||
| Limited sample availability (samples < 10 cm3) | yes | yes | no | no | ||
| Quick test procedure by running multiple tests on one specimen | yes | yes | yes | yes | ||
| Easy operation (e.g. no manual preconsolidation of the specimen). | yes | yes | yes | yes | ||
| Computer-controlled, automatic test procedure | yes | yes | yes | no | ||
| Software available for the evaluation of the test results. | yes | yes | yes | yes | ||
| Large shear deformation possible; therefore also products with extreme elasticity or plasticity can be tested. | yes | yes | yes | yes | ||
| Very poor flowing, fine-grained products can be tested (e.g. sewage sludge, carbon black, titanium dioxide). | yes | yes | yes | yes | ||
| Testing relatively large particles (> 1..2 mm) | no | no | yes | yes | ||