This unique digital-readout system is designed around Centurion NDT’s versatile PS-710 PulseUltrasonic test instrument. The system can provide digital display of part thickness (mechanically ofultrasonically measured) or of ultrasonic velocity. Since there is a relationship between velocity anddegree of nodularity in ductile iron castings, the system is primarily used for sorting of such castingswhere other variables such as chemistry and heat treat are held constant.