Previous studies had shown that the mass‐spring lattice model (MSLM) is capable of accurately simulating two‐dimensional propagation, reflection, refraction, and scattering of ultrasonic waves. In the present work, models of ultrasonic probes were developed, and they were combined with the MSLM to develop a complete simulator of ultrasonic testing (UT). Several problems of typical ultrasonic testing were simulated using the developed UT simulator to demonstrate its capability to predict the waveform in ultrasonic tests. © 2004 American Institute of Physics