Technological Highlights

Simple and intuitive operation

  • Easy to use, intuitive, multilingual user interface
  • Highest safety and robustness of measurement
  • Supports automatic start-up
  • Handles up to 4 measuring channels per unit



State of the art technology

  • Extremely fast
  • Highest safety (designed according to IEC 61508 (SIL Standard))
  • Highest accuracy

AOS - Activity Optimized Source

In this particular type of rod source the accu­racy in the upper part of the measuring range can be increased significantly by optimizing the distribution of activity. Especially for small for­mats the statistical noise is minimized, without increasing the overall activity of the source.
Or are you content with the accuracy? In this case AOS can be used to reduce the source activity while maintaining the same accuracy. Depending on the application, the use of smaller shieldings is possible. In many cases the more cost-efficient lead may be used instead of tungsten.

Unique rod source quality!

Co-60 rod sources are used as a standard in mold level measurements. The special feature: the rod sources are characterised by a continuous distribution of activity, which can only be realised through the unique manufacturing process from Berthold. The best measurement accuracy is achieved with these rod sources from Berthold because the accuracy is consistently high over the entire measuring range.

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Measuring the steel level in continuous casting

Radiometric based mould level measurement is the dominating technology for measuring the steel level in continuous casting. Herein we discuss performance, statistical variation, influencing factors, source selection, and that recent development has brought the ability to also simultaneously measure the thickness of the casting powder layer. Continuous casting improves quality and reduces the production costs considerably. These advantages, as well as the improvement of the process in general, have led to the fact that today almost all steel production is done through continuous casting.

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castXpert LB 452

castXpert LB 452 transmtter  with display

Extremely fast

The unique short cycle time of 5 ms provides the ideal basis for reliable control.

Detector status

Detector temperature and status are continuously mon­itored and displayed.


Comprehensive self-diagnostics and plausibility checks of measurement and calibration ensure the highest process reliability.

Highest accuracy

By using several calibration points, non-linearities of the calibration curve are eliminated completely, and high accuracy can be achieved over the entire measuring range.

Designed according to IEC 61508 (SIL Standard)

Easy to use

The large colour touchscreen makes operation and calibration particularly easy. The ability to select from different operating languages facilitates ease of oper­ation. Regardless of where the system is installed.

Automatic start-up

Benefit from faster response times during start-up of casting, by the ability to set a smaller time constant in the low measuring range.

4 measuring channels

Up to four strands can be measured simultaneously. Each measurement channel is equipped with its own power supply and CPU. Therefore, the channels are independent of each other and high process reliability is guaranteed.

Monitored current output

Continuous monitoring of the current output ensures highest reliability and signal stability. This plausibility test is patented.


Mold level measurement Brochure

English | PDF | 1.0 MB

AOS - Activity Optimized Source Flyer

English | PDF | 500.4 KB

Measurement solutions for the steel industry Brochure

Englisch | PDF | 1.3 MB

Manual mold level LB 452

English | PDF | 10.4 MB

Related Application

Mold Level of steel

Mold level measurement of the steel meniscus during continuous casting applications