NDT Magnetic Particle Inspection works by creating a magnetic field in the material being inspected using a magnetic yoke, coil, or permanent magnet. If there is a defect or crack present, the magnetic field will cause magnetic flux leakage around the defect, resulting in the accumulation of fine magnetic particles at the defect location. This accumulation creates a visible indication, which can be observed using visible or fluorescent magnetic particles. The inspector can then evaluate the size, shape, and location of the indications to determine the severity and type of defect. NDT Magnetic Particle Inspection can be performed using either a dry or wet method, depending on the application and requirements. It is a sensitive and efficient method for detecting surface and near-surface defects in ferromagnetic materials, making it an essential tool in non-destructive testing for ensuring product quality and safety.