ROSEN Combined MFL/Ultrasonic Detection Tool (RoCorr·MFL/UT) employs twin inspection technologies to achieve enhanced performance in defect detection and sizing. Ultrasonic Technology (UT) can detect and accurately size defects where Magnetic Flux Leakage (MFL) technology has limitations, for example, large areas of uniformly-corroded metal loss and laminations. Conversely, MFL can detect and size defects where UT has limitations, for example small corrosion pits and internal defects covered by wax or other deposits. With a combined MFL/UT tool, the strengths of both inspection methods provide the most comprehensive detection and sizing results in the market from a single run.