Phased Array Ultrasonic Testing (PA UT) uses a single transducer containing multiple elements (16 to 128) to send angle beams of sound through the test object. Each element can be individually pulsed to send out timed sound waves, in phases. This creates several beam angles, which combine to make an array. This array identifies changes in the material, such as cracks or inclusions, and shows these indications on the screen.
