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The FIBERTRAC 31 is a radiation-based sensor with flexible plastic detector for continuous measurement of liquids and bulk solids. It is suitable for level measurement under extreme process conditions, in aggressive products or critical product features. The FIBERTRAC 31 delivers precise measuring results even under hardest application conditions.

Your benefit

  • Simple mounting on round and conical vessels through flexible detector
  • High plant availability through non-contact measurement
  • Cost saving through use of only one sensor up to 7 m measuring range

Application area

The flexible detector is used on round vessels and vessels with conical outlet and is suitable for measurement of liquids, solids, slurries and suspensions. Due to its thin, flexible scintillator cross-section, FIBERTRAC 31 can be easily adapted to round vessels.

Distillation column

The heavy, highly viscous process material and extreme temperature are located in the bottom part of the distillation. For level control of residual feeds, a non-contact measurement is essential for reliability. Monitoring head space pressure at the upper end of refinery columns is important to ensure that the process is operating under ideal conditions.

Fluid catalytic cracking unit

Fluid Catalytic Cracking (FCC) is one of the most important conversion processes used in petroleum refineries. As with many other refining applications, the vessels in the reactor system need to be operated and controlled at their optimum levels, as this is critical for the process productivity. Maintaining the proper levels also ensures that the expensive catalyst is used at maximum efficiency, with no waste.


Evaporators are heat exchangers that are deployed at the bottom of distillation columns. In the evaporator, the residue is boiled up from the sump and fed back into the distillation process. Precise control of the level in the evaporator ensures efficient operation of the plant. A reliable measurement also ensures that the heating coils are always covered with liquid, to prevent any overheating incidents.

Learn more about level measurement products and more continuous level measurement products from BBP.

Additional information


Chemical, Engineering, Food & Beverage, Oil & Gas, Pharmaceutical, Power Generation, Pulp & Paper, Refining, Water & Wastewater