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Sample analysis in the IMPOC test stand

How does it work? And when does it make sense?

IMPOC teststand at EMG

In discussions with users, we are often confronted with the question under which circumstances preliminary sample examinations with the EMG IMPOC online material testing system are useful and how they are carried out in a test stand at EMG in Germany? 

In the forefront to new system installations, sample testing at EMG in Germany is generally not necessary. Today the system covers a wide range of steel grades. This includes bake-hardening and high-strength IF steels, micro-alloyed and various multiphase steels. Only in the case of complex phases and high-strength steels above approx. 900 megapascals can sample analyses be useful in individual cases. Sample examinations are also necessary for strip thicknesses outside the specification for the PowerIMPOC version, i.e. for thicknesses above 6 mm.

The video "EMG Technology nugget - sample tests in the EMG IMPOC test stand in Germany", recently published on our YouTube channel, addresses these questions and impressively shows how sample tests are carried out in the test stand. The viewer "rides" through the test stand on the sample, so to speak, and the performance of the system becomes tangible experienced. The test stand allows the samples to be moved between the IMPOC heads on top and bottom side at a speed of up to 600 m/min. During each measurement, the sample is first automatically demagnetized, so that no falsification of the measurement result occurs. In the second part of the video it is shown that for research and development purposes 3D measurements of the magnetic field can also be carried out using a Hall probe in the same test station. 

But see for yourself:

To sum up:

  • With about 70 installations worldwide, EMG IMPOC is the only industrially proven and reliable measuring system for non-destructive online material testing of flat steel. 
  • The models formed so far for the use of EMG IMPOC cover a wide range of materials including the latest generation of high-strength steels.
  • The system is used on pickling, hot-dip galvanizing and annealing lines and increasingly on press and blanking lines in the automotive industry. 
  • EMG offers all necessary services for this system, the transfer of know-how and all necessary preliminary investigations within the scope of the individual project. 

Are you curious? Would you like to know more about EMG IMPOC and the associated application possibilities?

Please feel free to contact our sales department, our international sales organization or our product manager Matthias Bärwald (

Further information can also be found in the EMG IMPOC brochure.

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