Angle Beam Type
The ultrasonic probe / ultrasonic transducer for angle beam testing
Dual Element Longitudinal Wave
One case has dual element sending and receiving of sound wave with acoustic separation, the ultrasonic probe / ultrasonic transducer propagates angle longitudinal wave in test specimen.
Creeping Wave Type
The ultrasonic probe / ultrasonic transducer generates longitudinal wave propagating the surface of test specimen.