Lab instruments for oil and gas. Made in Germany.
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Rocking Cell RC5

Research of Gas Hydrates

With the Rocking Cell RC5 by PSL Systemtechnik hydrate-formation can be examined and effectiveness and efficiency of kinetic hydrate inhibitorsand the influence of corrosion inhibitorscan be tested in laboratory.


  • 5 movable test chambers extended up to 10 
  • Separately adjustable pressure up to 200 bar (2,900 psi)
  • Turbulent mixing stringent conditions
  • Long-time experiments up to 30 days
  • Variable test settings
  • Compact and automated with integrated PC
  • Easy filling and cleaning


  • Examination of kinetic gas hydrate inhibitors (KHI)
  • Influence of corrosion inhibitors (CI)
  • Optimisation of inhibitor concentrations
  • Quality control


The Rocking Cell uses one of the most stringent condition of the currentlyaccepted methods for research on hydrate inhibitors and influence of corrosion inhibitors. 

The measuring principleof the rocking cell is based on the steady tilting of cooled, pressurised test cells (rocking cells).
While tilting, a ball inside the camber is steadily rolling over the length of the test chamber, thereby blending the fluid-gas mixture.
The movement of the ball creates strong shear forces and turbulences in the test chamber. Thus, the conditions in pipelines are reproduced

For testing the test chambers are filled with a sample fluid (water or other) and a certain amount of inhibitor. The test chambers are cooled down to a given test temperature. Subsequently, the central gas supply is used, to fill each chamber to the individually required pressure of up to 200 bar (2,900 psi).

The 5 test chambersare mounted on a movable axis in a closed cooling bath with cooling liquid. Only this axis is tilted during the test. This offers the advantage, that only the test chambers are moved but not the cooling bath itself. 
The Rocking Cell is extendable up to 10 test chambers.
The test chambers are magnetically attached and can thus be easily removed for filling or cleaning.

The compact Rocking Cell requires only a small amount of space and is equipped with an integrated PC.

typical experimentis executed in three steps:

  1. Flowing conditions: The test chambers are see-sawed with an adjustable rocking rate and rocking angle. Meanwhile, they are brought to a given temperature, either directly or via temperature ramp.
  2. Shut-in: The test chambers are kept in a given position (adjustable up to 45° angle). The sample is cooled or heated to a given temperature. 
  3. Restart flowing conditions: The test chambers are tilted again with an adjustable rocking rate and rocking angle and cooled or heated, respectively, to a given temperature.

During a test run, temperature and pressure values are recorded. 
Thus you can monitor hydrate formation by the pressure changes that result from forming and dissociation of gas hydrates.

The pre-installed PSL softwareWinRCenablescomfortable data recordingand evaluation, as well as scheduling and execution of automated test runs.

Versatile test runs are possible with variable scheduling of test conditions. With the PSL software you can define test parameters like 

  • temperature
  • rocking rate 
  • rocking angle
  • duration of the test run
  • duration of shut-in
  • position of test chamber during shut-in. 

Long time runs up to 30 days and longer are possible. 

Test chambersare made of stainless steelto achieve realistic pipeline conditions. For sweet testing V2A mixing balls can be used. For sour testing glass balls are available. Additionally, cells and manifold systems can be made out of HastelloyFeed lines and connectionsare made of PEEK, to prevent condensation.

Furthermore, we can adapt the Rocking Cell to your requirements.

Copyright © July 2022 PSL Systemtechnik GmbH