Abstract

Non-destructive testing consists of defectoscopy and structoscopy. The paper presents the Czech instrumental history of electromagnetic structoscopy since the fifteenth years of twenty centuries. Comparaing very simple aparatus of SK series; Electron FEROSKOP as a predecessor of Foerster's Q-Magnet test. Quasi-static pulsed REMAGs with sheath wire reels. Highly productive and inexpensive MELVIS multi-frequency systems; The DOMENA series of battery-powered mobile devices based on the magnetic spot principle. TELIT series of combined structuroscopes (MT+UT). Magnetic Acceptive Testing (STALEMAT). Piece of knowledge from application, current status.

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