The CIRCOGRAPH sensor systems can display even the smallest material flaws from approx. 30 µm defect depth in high resolution along its full length. From fine wire with a diameter of 2 mm to tubes with a diameter of 130 mm, the sensors cover all requirements in the bright steel range. The probes rotate at a high speed around the test piece and scan its surface in a helical manner without making contact. This method creates high throughput of up to 3 m/s and continuous testing. Ultimate eddy current testing by FOERSTER.