Dual Element Transducer
A dual element transducer consists of two crystal elements housed in the same case , sepearated by an acoustic barrier .
one element transmits longitudinal wave and the other element acts as a receiver .
Advantages
Improved near surface resolution
Eliminates delay line multiples for high temperature applications .
Couples well on rough and curved surface
Reduces direct back-scattering noise in coarse grained or scattering materials
Combines penetration capabilities of a lower frequency single element transducer with near surface resolution capabilites 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 laminications in catings and forgings
Crack detection in bolts or other cylindrical objects
