Ultrasonic testing involves a digital instrument which utilizes and measures sound waves  transmitted and reflected to measure material thickness and continuity.

 The most  commonly used ultrasonic testing technique is pulse echo, whereby pulsed  beams of  high frequency ultrasound from a transducer are  directed at the test object and  reflections (echoes) from  internal imperfections, or the part's geometrical surfaces, are  returned to a receiver. A screen is used to display graphs of the  amplitude and the time  taken for the pulse to return. Changes  in the signal are indicative of varying material  thicknesses, or in  the absence of this, a defect.

 Ultrasonic testing is often used to  compare specimens that  should be identical - if one gives a different sonic signature, it  may be because of the  presence of a defect. These graphs are retained and  downloaded to our field computer.

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