Detect Level Switch reliably

Point Level SwitchPoint Level Switch

Level Switch - Measuring principle by Berthold

Gamma radiation emitted from a shielded source irradiates the vessel at the pre-defined level height. When the level reaches this limit, the radiation is significantly weakened or totally absorbed. The strong and sudden attenuation is measured by a detector at the opposite side of the vessel and an alarm is activated.

Temperature, pressure, dust, colour or chemical properties of the product have no influence on the outcome of the measurement. Consequently this results in the high reliability and low maintenance of the radiometric measurement systems, even under harsh operating and environmental conditions.

Level Switch Measurement - Benefits at a Glance:

  • Highly accurate and reliable
  • No wear and tear
  • No maintenance required at any time
  • Unaffected by temperature, pressure, dust, colour, conductivity or chemical properties of the measured material
  • Universally applicable on all kinds of vessels, without modification of the plant.

XIP (X-Ray Interference Protection)

In industrial plants, weld inspections on pipes are regularly examined for cracks. Gamma sources with very high activity are frequently used as test equipment. Radiometric level and density measurements can however be affected by this gamma radiation and thus simulate low readings. Influencec areas of up to several 100 m distance are not uncommon. The range of ​​influence essentially depends on the activity of the test source and whether any buildings or vessels situated between the testing point and the measuring point minimize or even shield the influence.

A falsification of the measured value by external radiation can be prevented with the function XIP from Berthold Technologies. If external radiation is detected, the measured value is frozen until no external radiation is present. As long as the measured value is frozen, the measurement then signals external radiation via a binary signal, which informs the control room about this operating state. It should be noted that all Berthold level measurements are equipped with XIP.


For an overview of our products, please see Level Switch