Profile: Centurion N D T, Inc. develops, manufactures, and services eddy current and ultrasonic instrumentation. Our brands include ED-520™, FM-140XL™, and Visual Eddy™. Our products include ferrous sorting instrument, digital conductivity instrument, flaw detection instruments, and specialty instruments. Our ED-300XL is a low frequency eddy current instrument for measuring and sorting ferrous materials for hardness, alloy content, heat treatment and metallurgical structure. The unit compensates for surface roughness, permitting accurate readings through .010" to .015" coatings of rust, dirt or scale.