Olympus NDT ultrasonic spot weld transducers are specifically designed to provide optimal performance for nondestructive testing of numerous types of spot welds, including those used in automotive and industrial applications. Ultrasonic inspection of spot welds involves the analysis of what is known as the "ringdown" of sound within the weld nugget. Unlike many other direct measurement techniques, spot-weld inspection looks at the characteristics of the multiple echoes returned from sound energy ringing within the weld nugget. Echo spacing, sound attenuation, and intermediate echo detection are some of the indicators of weld quality that are analyzed by trained inspectors.

Our transducers have excellent signal-to-noise ratios due to broadband design, which is critical for distinguishing good welds from poor welds. These transducers are available in a multitude of sizes in 0.5 mm increments to ensure that the proper transducers are available for a variety of weld nugget sizes. Element sizes are engraved with both English and metric units for worldwide use. The versatile design of these spot weld transducers allows them to be used with either a soft membrane captive water column or a hard tip delay line. Transducers, delay lines, and water columns are sold separately.

Top Row: Transducer, Water Column, Membranes Bottom Row: Transducer, Delay Line, Delay Line Retaining Ring

Transducer Configurator

Select either delay line or water column.
(Transducers, delay lines, delay line retaining rings, water columns, and membranes need to be ordered separately.)

Item Number	Part Code	Frequency (MHz)	Nominal Element Size (mm)	Nominal Element Size (in)	Series	Delay Lines		Delay Line Retaining Rings	Water Columns
U8415025 U8415025 Delay Line, Water Column Spot-Weld Transducer. 15 MHz, 0.118 in./3.0 mm element diameter. For use with DLCW-1003 Water Column or SWDL-30 / SWDL-32 Delay Line & SWRR-1 Retaining Ring (not included). Includes Test Form Certificate	V2330	15	3	0.118	VIDEOSCAN	SWDL-32	SWDL-30	SWRR-1	DLCW-1003
U8415026 U8415026 Delay line / water column Spot-Weld Transducer. 15 MHz, 0.138 in./3.5 mm element diameter. For use with DLCW-2003 water column or SWDL-35 / SWDL-37 delay line & SWRR-2 retaining ring (not included). Includes Test Form Certificate	V2335	15	3.5	0.138	VIDEOSCAN	SWDL-35	SWDL-37	SWRR-2	DLCW-2003
U8415027 U8415027 Delay line / water column Spot-Weld Transducer. 15 MHz, 0.157 in./4.0 mm element diameter. For use with DLCW-2003 water column or SWDL-40 / SWDL-42 delay line & SWRR-2 retaining ring (not included). Includes Test Form Certificate	V2340	15	4	0.157	VIDEOSCAN	SWDL-40	SWDL-42	SWRR-2	DLCW-2003
U8415028 U8415028 Delay line / water column Spot-Weld Transducer. 15 MHz, 0.177 in./4.5 mm element diameter. For use with DLCW-2003 water column or SWDL-45 / SWDL-47 delay line & SWRR-2 retaining ring (not included). Includes Test Form Certificate	V2345	15	4.5	0.177	VIDEOSCAN	SWDL-45	SWDL-47	SWRR-2	DLCW-2003
U8415029 U8415029 Delay Line, Water Column Spot-Weld Transducer. 15 MHz, 0.197 in./5.0 mm Element Diameter. For use with DLCW-2003 Water Column or SWDL-50 / SWDL-52 Delay Line & SWRR-2 Retaining Ring (not included). Includes Test Form Certificate	V2350	15	5	0.197	VIDEOSCAN	SWDL-52	SWDL-50	SWRR-2	DLCW-2003
U8415030 U8415030 Delay line / water column Spot-Weld Transducer. 15 MHz, 0.217 in./5.5 mm element diameter. For use with DLCW-2003 water column or SWDL-55 / SWDL-57 delay line & SWRR-2 retaining ring (not included). Includes Test Form Certificate	V2355	15	5.5	0.217	VIDEOSCAN	SWDL-55	SWDL-57	SWRR-2	DLCW-2003
U8415031 U8415031 Delay line / water column Spot-Weld Transducer. 15 MHz, 0.236 in./6.0 mm element diameter. For use with DLCW-2003 water column or SWDL-60 / SWDL-62 delay line & SWRR-2 retaining ring (not included). Includes Test Form Certificate	V2360	15	6	0.236	VIDEOSCAN	SWDL-60	SWDL-62	SWRR-2	DLCW-2003
U8415032 U8415032 Delay Line, Water Column Spot-Weld Transducer. 15 MHz, 0.256 in./6.5 mm Element Diameter. For use with DLCW-3003 Water Column or SWDL-65/ SWDL-67 Delay Line & SWRR-3 Retaining Ring (not included). Includes Test Form Certificate	V2365	15	6.5	0.256	VIDEOSCAN	SWDL-65	SWDL-67	SWRR-3	DLCW-3003
U8415033 U8415033 Delay line / water column Spot-Weld Transducer. 15 MHz, 0.315 in./8.0 mm element diameter. For use with DLCW-3003 water column or SWDL-80 / SWDL-82 delay line & SWRR-3 retaining ring (not included). Includes Test Form Certificate	V2380	15	8	0.315	VIDEOSCAN	SWDL-80	SWDL-82	SWRR-3	DLCW-3003
U8415024 U8415024 Delay Line, Water Column Spot-Weld Transducer. 15 MHz, 0.98 in./2.5 mm Element Diameter. For use with DLCW-1003 Water Column or SWDL-325/ SWDL-27 Delay Line & SWRR-1 Retaining Ring (not included). Includes Test Form Certificate	V2325	15	2.5	0.98	VIDEOSCAN	SWDL-25	SWDL-27	SWRR-1	DLCW-1003
U8415034 U8415034 Delay line / water column Spot-Weld Transducer. 20 MHz, 0.098 in./ 2.5 mm element diameter. For use with DLCW-1003 water column or SWDL-25 / SWDL-27 delay line & SWRR-1 retaining ring (not included). Includes Test Form Certificate	V2425	20	2.5	0.098	VIDEOSCAN	SWDL-25	SWDL-27	SWRR-1	DLCW-1003
U8415035 U8415035 Delay line / water column Spot-Weld Transducer. 20 MHz, 0.118 in./ 3.0 mm element diameter. For use with DLCW-1003 water column or SWDL-30 / SWDL-32 delay line & SWRR-1 retaining ring (not included). Includes Test Form Certificate	V2430	20	3	0.118	VIDEOSCAN	SWDL-30	SWDL-32	SWRR-1	DLCW-1003
U8415036 U8415036 Delay line / water column Spot-Weld Transducer. 20 MHz, 0.138 in./3.5 mm element diameter. For use with DLCW-2003 water column or SWDL-35 / SWDL-37 delay line & SWRR-2 retaining ring (not included). Includes Test Form Certificate	V2435	20	3.5	0.138	VIDEOSCAN	SWDL-35	SWDL-37	SWRR-2	DLCW-2003
U8415037 U8415037 Delay line / water column Spot-Weld Transducer. 20 MHz, 0.157in./4.0 mm element diameter. For use with DLCW-2003 water column or SWDL-40 / SWDL-42 delay line & SWRR-2 retaining ring (not included). Includes Test Form Certificate	V2440	20	4	0.157	VIDEOSCAN	SWDL-40	SWDL-42	SWRR-2	DLCW-2003
U8415038 U8415038 Delay line / water column Spot-Weld Transducer. 20 MHz, 0.177 in./4.5 mm element diameter. For use with DLCW-2003 water column or SWDL-45 / SWDL-47 delay line & SWRR-2 retaining ring (not included). Includes Test Form Certificate	V2445	20	4.5	0.177	VIDEOSCAN	SWDL-45	SWDL-47	SWRR-2	DLCW-2003
U8415039 U8415039 Delay line / water column Spot-Weld Transducer. 20MHz, 0.197 in./5.0 mm element diameter. For use with DLCW-2003 water column or SWDL-50 / SWDL-52 delay line & SWRR-2 retaining ring (not included). Includes Test Form Certificate	V2450	20	5	0.197	VIDEOSCAN	SWDL-50	SWDL-52	SWRR-2	DLCW-2003
U8415040 U8415040 Delay line / water column Spot-Weld Transducer. 20 MHz, 0.217 in./5.5 mm element diameter. For use with DLCW-2003 water column or SWDL-55 / SWDL-57 delay line & SWRR-2 retaining ring (not included). Includes Test Form Certificate	V2455	20	5.5	0.217	VIDEOSCAN	SWDL-55	SWDL-57	SWRR-2	DLCW-2003
U8415041 U8415041 Delay line / water column Spot-Weld Transducer. 20 MHz, 0.236 in./6.0 mm element diameter. For use with DLCW-2003 water column or SWDL-60 / SWDL-62 delay line & SWRR-2 retaining ring (not included). Includes Test Form Certificate	V2460	20	6	0.236	VIDEOSCAN	SWDL-60	SWDL-62	SWRR-2	DLCW-2003
U8415042 U8415042 Delay line / water column Spot-Weld Transducer. 20 MHz, 0.256 in./6.5 mm element diameter. For use with DLCW-3003 water column or SWDL-65 / SWDL-67 delay line & SWRR-3 retaining ring (not included). Includes Test Form Certificate	V2465	20	6.5	0.256	VIDEOSCAN	SWDL-65	SWDL-67	SWRR-3	DLCW-3003

Captive Water Column Membranes (Includes O-Rings)