Low Frequency PA Inspection

Conventional phased array (PA) probes have significant limitations when inspecting heavy composites thicker than 50 mm (2 inches). Even traditional PA probes at 2.0 MHz frequency are not the appropriate solution for such high signal attenuation and long sound path. The 0.5 and 1.0 MHz PA probes are available that can successfully provide C-scan mapping over large glass fibre surfaces. Furthermore, lamination defects can be identified in aluminium slabs.