Lab instruments for oil and gas. Made in Germany.

Turbulence Rheometer

Quality control of Drag Reducing Agents

The Turbulence rheometer (TR) by PSL Systemtechnik is a fully automated laboratory plant to research fluid currents in pipelines.



  • Compact laboratory plant
  • Different Reynolds numbers can be analyzed in one test run
  • Minimal shear forces, no edges, constant acceleration
  • Different capillary length and diameters usable
  • Adaptation to customer requirements possible


  • Testing the efficiency of Drag Reducing Agents (DRA) 
  • Optimizing Drag Reducing Agents
  • Quality control


The plant enables significant time-savings in test series and has a compact design. An integrated PC with operating software allows for an easy handling, supervision and evaluation of test series.
The measurement principle of the TR is an hydraulic piston, which moves the sample piston. Thus, every contact between sample fluid and hydraulic fluid is prevented.

The sample is pumped through a test capillary with small diameter. This enables test conditions with variable flow rates and in a wide range of Reynolds numbers. Just a small amount of sample is required for this.

The effects of the DRA can be observed by direct pressure measuring or calculation of the differential pressure-loss in separate segments of the capillary. By comparing the pressure-loss with or without DRA-addition its influence results directly. Different Reynolds numbers can be analyzed in one test run by variating flow rates. Automatisch wiederholbare Tests ermöglichen die Untersuchung des Langzeitverhaltens der DRA.

To guarantee best measurement results the TR was designed without edges or changes in diameter. Special geometries of the piston and piston head enable constant acceleration values at the injection and thereby minimize shear forces. By hydraulic filling and emptying of the test capillary pumps were made obsolete. Test capillary, sample cylinder and sample container are thermostated. Depending on sample viscosity different capillary length and diameters are usable.

The recorded measuring data can be imported and evaluated in Excel. The evaluation can be alleviated by an optional available software tool.

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