Sizing indications with ultrasonics can be challenging. For large indications sizing by probe travel is appropriate, for indications smaller than the beam width amplitude-based sizing. But what about indications smaller than the wavelength? This video is all about those TINY defects and why you should NEVER use Flat Bottom Holes smaller than ¼ of the wavelength!

► Video: Sizing of Small Defects with Ultrasonic Testing: Don't use Flat Bottom Holes!!!

https://youtu.be/mr778r1uStw

► Paper: Correct sizing of reflectors smaller than one wavelength

https://www.researchgate.net/publication/325597212

► Video: Ultrasonic Testing Sizing Method Comparison & Limitations

https://youtu.be/zZroaqqDGug

► Video: Basics of Ultrasonic Testing and Sizing

https://youtu.be/5Pg21GHtKO8

► Video: Ultrasonic Calibration and Sizing with DGS (AVG)

https://youtu.be/OeDGVhwU5lE

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