TOFD Probes

Access to new TOFD capabilities

Principle - Applications

Cracks detection, sizing and monitoring of cracks, irrespective of type and/or orientation, by using the diffracted sound initiating from the flaw tips.

Advantages of the technique

- Quick implementation
- Combined detection and sizing capabilities
- High probability of detection

Advantages of Imasonic probes

- High sensitivity and s/n ratio (+10 to + 50dB) compared to conventional TOFD transducers, while keeping a short pulse length.
- Centre frequency up to 15 MHz
- Access to difficult area thanks to miniaturisation

Main characteristics

- Active part in piezocomposite material
- Centre frequency (-6dB) : from 2 MHz to 15 MHz
- Relative bandwidth (-6dB) : 60 to 90 %
- Acoustic impedance matched to wedge material
- Watertight stainless steel housing

Options

- Integral wedge for better coupling and space saving
- Custom wiring
- Housing adaptation to mechanical set-up (probe holder..)
- Adaptation to environmental constraints (temperature, radiation, vibrations…)

Standard screw-in probes

Several applications do not require custom probes. For this purpose, Imasonic has developed the TO series. More >>

Special TOFD probes

TOFD transducers can be integrated in special probes adapted to particular geometry, for example :
- Extra flat curved probes for penetration tubes inspection
- Cylindrical probes for small tube inspection by the inside

TOFD technique can also be combined with phased array, using two identical probes, so that the area of interest can be electronically selected without moving the probes