The Handyscan, developed by 3P Services and certificated by the German TÜV, quickly and reliably detects corrosion on the remote side of the plate. It is based on the Magnetic Flux Leakage (MFL) principle. Measuring with the Handyscan does not require any special preparation of the surface (e.g. sand blasting) nor is a coupling medium necessary. The Handyscan system consists of two components: a test head and a display unit with a headphone.