Model TOFD

TOFD Angle-Beam Transducers
Time-Of-Flight Diffraction (TOFD) is a method used to determine the size of cracks in metallic welds. It requires highly-damped, broadband transducers and wedges that generate refracted longitudinal waves (L-waves). SNI’s TOFD transducers have state-of-the-art piezocomposite elements (C series*) and Quick Swap screw-in wedge attachment. Straight-mounted connectors are Microdot (3/8-32) or Lemo-00 (M12 case).
Angle-Beam Transducers
and their wedges generate shear (transverse) waves at the specified angle in a given test material to detect flaws that cannot be detected by a straight-beam transducer. Typical applications include weld inspection, tube and pipe, shafts, turbine blades, and wheel rims. Shear waves are produced by refracting a longitudinal wave in a precision machined acrylic wedge that also minimizes wedge noise.

Element Diameter | A | B | C | ||||
---|---|---|---|---|---|---|---|
inch | mm | ||||||
0.125 | 3 | 0.37 in. | 9.4 mm | 0.72 in. | 18.3 mm | 0.41 in. | 10.4 mm |
0.25 | 6 | 0.37 in. | 9.4 mm | 0.72 in. | 18.3 mm | 0.41 in. | 10.4 mm |
Frequency (MHz) | Element Diameter | Part Number | ||||
---|---|---|---|---|---|---|
inch | mm | Connector | C* | Wedges | Accessories | |
5 | 0.125 | 3 | Microdot | 00-010168 | 45°L 01-010475 | |
60°L 01-010476 | ||||||
70°L 01-010477 | ||||||
0.25 | 6 | Microdot | 00-010398 | 45°L 01-010475 | ||
60°L 01-010476 | Cables | |||||
70°L 01-010477 | MD - BNC | |||||
10 | 0.125 | 3 | Microdot | 00-010166 | 45°L 01-010475 | 6-t (1.83 m) |
60°L 01-010476 | 07-010012 | |||||
70°L 01-010477 | ||||||
0.25 | 6 | Microdot | 00-010387 | 45°L 01-010475 | ||
60°L 01-010476 | ||||||
70°L 01-010477 | ||||||
15 | 0.125 | 3 | Microdot | 00-010165 | 45°L 01-010475 | |
60°L 01-010476 | ||||||
70°L 01-010477 |

Element Diameter | A | B | |||
---|---|---|---|---|---|
inch | mm | ||||
0.125 | 3 | 0.47 in. | 12 mm | 0.83 in. | 21 mm |
0.25 | 6 | 0.47 in. | 12 mm | 0.83 in. | 21 mm |
Frequency (MHz) | Element Diameter | Part Number | |||
---|---|---|---|---|---|
inch | mm | Connector | C* | Accessories | |
5 | 0.125 | 3 | Lemo-00 | 00-010299 | |
0.25 | 6 | Lemo-00 | 00-010300 | ||
Cables | |||||
10 | 0.125 | 3 | Lemo-00 | 00-010298 | MD - BNC |
6-t (1.83 m) | |||||
07-010014 | |||||
0.25 | 6 | Lemo-00 | 00-010386 | ||
15 | 0.125 | 3 | Lemo-00 | 00-010631 | |