• visual testing:
    • direct
    • remote - using endoscope, videoendoscope:
      • in visible light
      • in UV/A radiation
  • magnetic-particle testing: 
    • contrast method
    • fluorescent method
  • dye penetrant testing method:
    • contrast method
    • fluorescent method
  • ultrasonic testing
  • ultrasonic Phased Array testing
  • metallographic testing
  • eddy-current testing
  • ultrasonic wall thickness measurement
  • ultrasonic oxide thickness measurement
  • coating thickness measurement
  • metal hardness measurement