SENTINEL™ has added six new ultrasonic thickness gages to its long list of non-destructive testing equipment. The SENTINEL™ Waveform Ultrasonic Thickness Gage is the smallest ultrasonic thickness gauge with high resolution color waveform display. Unique features include live color A-Scan and B-Scan, 50K thickness reading (5000 waveforms) datalogger with interface program, vibration and color change of waveform on alarm.