Measuring level and density at different elevations

To achieve optimum control of the cracking taking place inside the hydrocracking reactor, the level of hydrocarbons, catalyst and gas is monitored by means of multiple density measurements spread along the height of the reactor. The radiometric density gauges from Berthold are very fast responding and are capable of measuring the smallest density changes even down to a resolution of ≤0.002 g/cm3.



Customer benefits

  • Maximum process transparency 
  • Reliable control over the cracking process
  • Increased throughput and availability
  • Efficient utilization of catalyst



  • Multiple point sources inserted in dip pipe
  • Typically a reduction of the vessel wall is required for improved measurement effect
  • Highly accurate density reading, resolution of ≤0.002 g/cm3
  • Very fast responding measurement

SIL certified option

The SENSseries LB 480 detectors offer versions that are certified for use in SIL 2 applications. SIL 3 is achieved by adding an identical redundant SIL 2 detector using the same source for homogenous redundancy. The certificate covers all measurement applications, from high level or low level alarms to continuous level and density. Thus the safe monitoring of critical processes is guaranteed.

More about SIL



The multiphase level measurement

For the measurement of three or more different product phases or where no clear interface is formed, our multiphase level measurement EmulsionSENS is used. Here, a density profile of the vessel contents is created and, depending on the measuring arrangement, the position of the individual phases is additionally determined.



Various thick walled vapor/liquid separators, catalyst handling vessel, various towers and in-line densities at high temperature and high pressure are also typical applications. Radiometric level and density measurements are used in the separation section of the hydrocracker to ensure that proper vapor/liquid separation occurs as the pressure and temperature is lowered through the various separators. Radiometric measurements are also used in the catalyst section of the hydrocracker to ensure the proper amount of catalyst is added or withdrawn from the reaction system to maintain effective cracking.


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