• Each equipment has their own methodology of testing, for example, the Magnetic detectors which magnetizes the material by making it the core of the coil and then it is passed through a high voltage current and the defects on the material gets visible when the component is sprayed by magnetic particles which is different from the Ultrasonic Flaw Detector, in which very short ultrasonic pulse-waves with certain frequencies are launched into materials to detect www.modernmetallurgical.com internal flaws or to characterize materials.