Measurement arrangement of EmulsionSENS and the resulting density profile

Two different arrangements

Aligned arrangement

Graphic EmulsionSENS in a desalter with aligned arrangement
  • Sources and detectors at same height
  • Output: Density values of each detector
  • Very precise point information
  • Density accuracy approx. 0.002 g/cm³
  • Cost effective

Staggered arrangement

Graphic EmulsionSENS in a desalter with staggered arrangement
  • Sources between detectors
  • Outputs: Density values of each detector and level of each layer
  • Precise information also between detectors
  • Reproducibility of the measured level values with accuracy of ± 25 mm
  • Configuration and visualization via transmitter unit

Optimal measuring arrangement

  • Non-contact measurement - Detectors and electronics have no contact with the interior of the vessel
  • Representative measurement due to high-energy gamma sources and a long measurement path in the product
  • Depending on requirements, two different arrangements (aligned or staggered) are available


Reliability and safety

  • Use under extreme process conditions possible
  • Redundant readings - density and level
  • Dose minimization - Use of low activities and safe handling of sources by using flange mounted shieldsUse of low activities and sources that can be retracted into flange mounted shields
  • Impervious to wall buildups

SIL certified option

The SENSseries LB 480 density detectors used to measure density in the EmulsionSENS soltuion are available with a SIL2 certificate. SIL3 can achieved with redundant installation of two LB 480 detectors at each location. Berthold is the first manufacturer of SIL certified, radiometric low level, high level, continuous level, and density measurement systems. With these certified detectors, safe operation of critical processes is guaranteed.

More about SIL


Detector retrofit program to improve your production

Especially in low radiation conditions, our highly sensitive detectors improve the signal to noise ratio, resulting in superior performance when compared to competing system. Replacing your existing detector with a more sensitive Berthold detector will delay source replacement, which is costly, time consuming what is resulting in superior measurement performance compared to competing systems. Source replacement is costly, time consuming, and does not work towards a reduction in overall site source activity.

Berthold's retrofit solution

The EmulsionSENS system components

Highly sensitive scintillation detectors

Offering features such as 304 or 316 L housing materials and SIL 2/3 certification, the highly sensitive LB 480 detectors are the ideal density meters for this measurement setup. The number of detectors used depends on the measuring range and the desired resolution. For the correct positioning of the detectors on the vessel outer wall, a robust, tailor-made mounting structure is used. Due to this arrangement, the detectors and the electronics are easily accessible for assembly and are also unaffected by the process temperatures in the vessel itself. The local density values of the individual detectors can be transferred to the customer control system via a 4 ... 20 mA HART signal.

More about this detector


Dip tube

A dip tube (dry well) is inserted inside the vessel to position the sources correctly and prevent them contacting the vessel's contents. In order to ensure an almost identical distance between the dip tube and the container inner wall across the entire measuring range, the geometry of the dip tube is determined by the vessel orientation: a straight dip tube is used for vertical cylindrical vessels; a curved dip tube is used for horizontal cylindrical vessels. Each dip tube is custom designed and is available in different materials.


The radiation sources are encapsulated gamma sources (Cs-137), which are installed in flexible rods. The number of sources or flexible rods is determined by the measuring range and the desired measuring arrangement.
Our sources are individually designed by our project engineers for each application, to minimize activity and doserate and optimize accuracy.

Go to sources


Berthold supplies a flange mounted shield into which the sources and flexible rods can be withdrawn and locked out for transport, storage, and to ensure the safety of workers needing to access the vessel. The height of the shields are minimized by using multiple flexible rods, but the shield effectiveness is maintained to minimize doserate.

For more information about Berthold shields, please follow the link below.

More about shields



Transmitter LB 478

If the level of the individual phases is required, the LB 478 transmitter is connected and the staggered arrangement is the first choice. Using the density outputs, the heights of the density detectors, and algorithms, this LB 478 unit determines the exact position of the individual layers and outputs level values as 4-20 mA HART signals. Monitoring both densities and phase levels ensures redundant signal transmission. The transmitters in the control cabinet also provide a display of the phase levels. 


Berthold has published the whitepaper “Multiphase level measurement - Improving level control in desalters to aid in use of opportunity crudes”, describing the different technologies for multiphase level measurement and their potential drawbacks, including the different nuclear density profile systems. This paper shows how Berthold with its highly sophisticated radiometric multiphase level measurement system EmulsionSENS helps refiners to optimize the separation process, minimize the probability of failure, increase efficiency, save chemicals, and reduce operating costs.

Get your copy


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