Measurement method

Magnetic Leakage Field Testing

Detection and localisation of prestressing steel cracks


The magnetic leakage field measurement method is used for the non-destructive and non-contact detection of fractures in the prestressing reinforcement of prestressed concrete structures. The transceiver unit, which contains an electromagnet and magnetic field sensors, is moved along the prestressing reinforcement on a rail. This magnetizes the steel to be examined. A magnetic leakage flux emerges at a fracture point, which is detected by the magnetic field sensors on the concrete surface.


This image shows Frank Lehmann

Frank Lehmann

Head of Unit

This image shows Michael Schreiner

Michael Schreiner

Deputy Head of Unit


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