... 128 or more channels 3. ultrasonic testing UT 1 Digital Multi-channel Ultrasonic flaw detector machine for big size tube 2 ... can allow for motor control and I/O interface.Each channel has three strobes, alarm strobe, tracking strobe, self locking strobe ... linearity ≤3% Horizontal linearity ≤1% Strobe setting Each channel has three strobes, alarm strobe, tracking strobe, self locking strobe Marking ...