... as aerospace, railway transportation and boiler pressure vessels, etc.The digital ultrasonic flaw detector is an essential instrument for non-destructive ... ,900,1000,2000,3000,4000,5000,6000,7000,8000,10000Adjusting step: 0.1mm(2.5 mm~99.9mm),1mm(100mm~10000mm ... )Frequency Range (MHz)0.5–15Gain adjustment (dB)0~110Adjusting step: 0.0,0.2,0.5,1,2,6,12Vertical ...