Short Range UT works based on the principle of sending high-frequency ultrasonic waves into the material and analyzing the reflected signals to detect defects. It involves using a small, handheld probe that emits and receives ultrasonic waves. The probe is placed directly on the surface of the component being inspected, allowing for localized and targeted inspection of specific areas. The received signals are analyzed to identify defects such as cracks, discontinuities, or wall thickness variations.