Dual Element Transducers

A dual element transducer has two crystal elements housed in the same case, separated by an acoustic barrier. One element transmits longitudinal waves while the other acts as a receiver. The elements are angled, creating a V-shaped sound path in the test material. This pseudo-focus enhances the resolution in the focal zone. These transducers offer many advantages, including improved near-surface resolution, good coupling to rough surfaces, and reduced back-scattering noise in coarse-grained or scattering materials. They are used in many applications such as measuring remaining wall thickness, corrosion/erosion monitoring, weld overlay inspection, and cladding bond/disbond inspection.