High Temperature TOFD

The High-Temperature TOFD transducer acts like a conventional TOFD transducer but designed for temperatures up to 200°C (392°F). Time-of-flight diffraction is a method used to determine the size of mid-wall and I.D. cracks in metallic welds. It requires highly-damped, broadband transducers and wedges that generate refracted longitudinal (L) waves. The high-temp TOFD transducers come standard with a straight-mounted Microdot connector. The TOFD wedge is also designed for use up to 200°C (392°F) and includes two coupling irrigation ports and gimbal-mounting holes.

Temperature & Testing Data

This data is calculated with the transducer, wedge, and asset all at 150°C (peek data) or 200°C (celazole data). During actual inspections, there will be a temperature gradient from the asset up to the transducer.

High-Temp Wedges – Celazole U-60

Up to 200°C (392°F)

	Celazole U-60
Temp (°C)	1st BW Gain (dB) Low / Low	Velocity (in./uS)	% Dif V from 25 °C	Gain at 80% FSH	% Dif BW from 25(°C)	Fc (MHz)	% Dif Fc from 25 (°C)
25	10	0.117	0.00	16	0.00	4.88	0.00
50	10	0.116	0.77	16	0.00	4.8	1.64
75	10	0.116	1.20	16.5	3.13	4.76	2.46
100	12.5	0.115	1.97	17.5	9.38	4.66	4.51
120	15	0.114	2.65	19.5	21.88	4.27	12.50
150	20	0.113	3.68	23.5	46.88	3.86	20.90
175	26	0.113	3.42	29.5	84.38	3.91	19.88
200	39	0.112	4.53	39	143.75	6.05	-23.98