Annular arrays

Applications

  • Thick parts inspection
  • Forged parts inspection

Principle and Advantages

Using electronic focusing, the focusing distance and the depth of field can be changed, this enabling thick parts to be inspected with excellent lateral resolution over a large range of depth, without changing the transducer.

General Characteristics

  • Frequency from 300 kHz to 20 MHz
  • High sensitivity and signal-to-noise ratio, thanks to the acoustic matching to water allowing a very good transfer of acoustic energy
  • Good axial resolution, and reduction of the unseen area below the surface thanks to a short pulse length
  • High reliability over time thanks to a design that is watertight and resistant to corrosion, compatible with permanent immersion under 1 m of water

Standard Configurations

Freq.
(MHz)
Nb elts Active diameter (mm) Housing  diameter x height (mm)*
10 8 18 25 x 40
10 16 25 35 x 40
10 32 35 45 x 45
5 8 35 45 x 40
5 16 50 60 x 40
5 32 70 80 x 50
2.25 16 80 90 x 50
2.25 32 110 120 x 50

*Indicative values

Options

  • Spherical or bifocal mechanical pre-focusing
  • Housing adapted to the probe holder
  • Halogen-free for nuclear environments
  • Customized cabling
  • Adaptation to a particular environment (temperature, pressure, radiation, chemical compatibility).