... more channels 3.NDT ultrasonic testing 1. Rail automatic (or semi-automatic) non-destructive ultrasonic testing2.reach the demands of ... rods, plates and other profiles, and the rail automatic (or semi-automatic) non-destructive ultrasonic testing.Features of Ultrasonic flaw ... step 0.1dBDetection channels 1,2,4,8,16 Operation mode Single probe transmitter and receiver, dual probe transmitter ...