The Centurion NDT ED-400M is the rugged version of the ED-400. Housed in a deep drawnaluminum enclosure, this version is built to take just about any punishment that comes its way. TheED-400M is a patented, solid-state eddy current instrument that is superior in detecting cracks inferro-magnetic material. It is relatively compact, lightweight and simple to set up and operate. TheED-400M is the perfect compliment or even as a replacement for magnetic particle inspection.