http://www.aaatesters.com/Krautkramer-Krautkramer_USN52L_Ultrasonic_Flaw_Detector.html
Now, there are ultrasonic flaw detectors with all the features you need for inspection in bright sunlight as well as in dark or poorly lighted conditions.
http://www.aaatesters.com/Ultrasonic_Flaw_Detector-Krautkramer.html
http://www.aaatesters.com/Products-Ultrasonic_Flaw_Detector.html
http://aaatesters.com/
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