- Solutions
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.

Fig. 1 - X6B positioned on thick walled composite
Frequency recommendation according to the GFRP thickness:
- MHz probe: T= 30 to 200 mm. Better resolution, main solution for glass fibre reinforced plastic
- 0.5 MHz probe: T< 50 to 500 mm. Very high attenuation material (Such as low-density polyethylene)
Recommended Tool Package
Category | Part# | Description |
---|---|---|
Acquisition Unit | VEO3 32:128 Phased array data acquisition unit | |
Probe | X6B | |
Wedge | X6BHG-001 | Designed for direct contact with maintained water coupling |
Direct contact inspection | FT1 Tape 100mm | Polyester tape made for direct contact inspection to protect the test piece surface and the probe face |
Encoder | AXYS encoder | |
Software | UT MAP / UTStudio+ |
Please contact our Applications Team if you have any questions. You can also find more solutions on our website.
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