Innovators in NDT Technology

TOFD Inspection

Time of Flight Diffraction (TOFD) is widely used in the oil and gas, petrochemical and power generation industries and is even more reliable than traditional radiographic, pulse echo manual UT and automated UT weld testing methods.

TOFD systems use a pair of ultrasonic probes sitting on opposite sides of a weld-joint or area of interest. The transmitter probe emits an ultrasonic pulse which is picked up by the receiver probe on the opposite side. In an undamaged part, the signals picked up by the receiver probe are from two waves – one that travels along the surface (lateral wave) and one that reflects off the far wall (back-wall reflection).

When a discontinuity such as a crack is present, there is a diffraction of the ultrasonic sound wave from the top and bottom tips of the crack. Using the measured time of flight of the pulse, the depth of the crack tips can be calculated automatically by trigonometry application.

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Results 1 - 9 of 9

WREN is a small frame scanner for TOFD inspection of welds of any material. It holds a single...

Swift is a compact single axis, magnetic wheeled scanner that holds a pair of TOFD or phased...

The highly versatile MagMan now features fourth generation upgrades to make this manual...

The MultiMag is a compact scanner suitable for circumferential weld testing of steel pipes. It...

SAW Bug is a motorised, magnetic-wheeled buggy that can carry up to six ultrasonic TOFD and/or...

The compact MagScan can be used for most weld testing requirements and is suitable for phased...

A versatile manual scanning solution developed for the inspection of nozzle welds in both...

The Duo scanner is a robust, ergonomic scanning frame with operator-friendly features offering...

The TOFD Caliper is a simple, pocket-sized scanner for TOFD inspection of welds of any...

TOFD transducers and wedges generate refracted longitudinal waves in steel.

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Can’t find what you are looking for in the standard TOFD range?

At Phoenix Inspection Systems Ltd, we like a challenge and so we can take on your difficult TOFD inspection problems and deliver a working, reliable and repeatable solution. Our team work with you to design bespoke transducers and scanners tailored to your exact specification. Often we can make a small modification to one of our standard range to deliver a very economical solution or design a totally new concept should the situation demand.

Contact us with details of your specific TOFD requirements.
Or call to discuss your TOFD inspection needs +44 (0) 1925 826000


Custom Build
Our Customers
Applus RTD
Network Rail
EDF Energy
Comex Nucléaire
BAE Systems
JF Nuclear
National Nuclear Laboratory
Oceaneering International
Amec Foster Wheeler
Dalton House,
40 Hardwick Grange,
WA1 4RF U.K.
t: +44 (0) 1925 826 000
f: +44 (0) 1925 838 788