High-temperature ultrasonic transducer

Two angled elements create a V-shaped sound path in the test material. This "Pseudo-Focus" enhances resolution in the focal zone. A dual element transducer consists of two crystal elements housed in the same case, separated by an acoustic barrier. One element transmits longitudinal waves, and the other element acts as a receiver. Advantages: • Improves near surface resolution • Eliminates delay line multiples for high temperature applications • Couples well on rough or curved surfaces • Reduces direct back-scattering noise in coarse grained or scattering materials • Combines penetration capabilities of a lower frequency single element transducer with the near surface resolution capabilities of a higher frequency single element transducer • Can be contoured to conform to curved parts Applications: • Remaining wall thickness measurement • Corrosion/erosion monitoring • Weld overlay and cladding bond/disbond inspection • Detection of porosity, inclusions, cracks, and laminations in castings and forgings • Crack detection in bolts or other cylindrical objects • Maximum temperature capability is 800°F (425°C) for 5.0 MHz and below; 350°F (175°C) for 7.5 MHz and 10 MHz. Recommended duty cycle for surface temperatures from 200°F (90°C) to 800°F (425°C) is ten seconds maximum contact followed by a minimum of one minute air cooling (does not apply to Miniature Tip Dual)