To be able to test larger surfaces for surface defects independent of their geometry, use of a scanner is recommended. This applies for example to the surface of boilers, vessels or reactors. Our scanners can be used on even, cylindrical and spherical surfaces and require approx. two or four minutes for scanning the nominal area size A4 or A3. Their high-temperature suction cups can be permanently used up to 200 °C. The test results are displayed and analysed as conclusive C-scan images. Up to 8 m2 surface per shift/team can be tested.