High frequency transducers

These are single-element transducers used in direct contact or immersion technique, designed to generate frequencies starting from 20 MHz and beyond. These transducers are available in fused silica delay line technology.

Benefits:

• Wide bandwidth and high damping ensure excellent resolution.
• Short wavelengths for improved defect detection.
• Focusing on very small beam diameters.
• Frequency range from 20-150 MHz (contact us for higher frequencies).

Benefits:

• High resolution for detecting defects such as micro-cracks or micro-porosities.
• C-scan imaging of surface-breaking cracks or irregularities.
• Thickness measurement of parts from 0.025 mm (steel equivalent).
• Inspection of technical ceramics and other materials. Material analysis.
• Acoustic microscopy.

High-frequency contact transducers

• Integrated fused silica delay line for evaluating defect severity, material analysis, or thickness measurements using the direct contact inspection method.
• Three different delay line types available to optimize signal echoes.
• Standard transducers come with radial output via Microdot connector.

	Delay line type	A	B	C
	SL	18 mm	21 mm	25 mm
	FL	9 mm	11 mm	21 mm
	FS	9 mm	11 mm	16 mm

Frequency MHz	Element diameter (mm)	Element diameter (inches)	Delay line length (µs)	Transducer reference
20	6 mm 6 mm 6 mm	0.25" 0.25" 0.25"	4.25 4.25 2.5	VF 202-FL VF 202-SL VF 202-FS
30	6 mm 6 mm 6 mm	0.25" 0.25" 0.25"	4.25 4.25 2.5	VF 302-FL VF 302-SL VF 302-FS
50	6 mm 6 mm 6 mm 3 mm 3 mm 3 mm	0.25" 0.25" 0.25" 0.125" 0.125" 0.125"	4.25 4.25 2.5 4.25 4.25 2.5	VF 502-FL VF 502-SL VF 502-FS VF 501-FL VF 501-SL VF 501-FS
75	3 mm 3 mm	0.125" 0.125"	4.25 2.5	VF 751-FL VF 751-FS
100	3 mm 3 mm	0.125" 0.125"	4.25 2.5	VF 1001-FL VF 1001-FS
125	3 mm	0.125"	2.5	VF 1251-FS
150	3 mm	0.125"	2.5	VF 1501-FS
Cable for all LEMO1 / Microdot transducers reference LCM 74-2 or BNC / Microdot reference 2124-2. For frequencies from 30 MHz, we recommend short cables with double shielding and very low impedance. Contact us

High-frequency transducers, immersion, standard housing

• Integrated fused silica delay line for frequencies above 30 MHz. For frequencies below 30 MHz, delay lines are epoxy.
• Focused transducers using optical-quality lenses.
• High frequency combined with a compact housing.

Frequency MHz	Element diameter (mm)	Element diameter (inches)	Delay line length (µs)	Focal length	Transducer reference
20	6 mm 6 mm 6 mm 6 mm	0.25" 0.25" 0.25" 0.25"	4.25 2.5 4.25 4.25	Flat 19 mm 32 mm 51 mm	VF 401 VF 402 VF 403 VF 404
30	6 mm 6 mm 6 mm 6 mm	0.25" 0.25" 0.25" 0.25"	4.25 2.5 4.25 4.25	Flat 19 mm 32 mm 51 mm	VF 405 VF 406 VF 407 VF 408
50	6 mm 6 mm 6 mm 6 mm	0.25" 0.25" 0.25" 0.25"	4.25 2.5 4.25 2.5	Flat 19 mm 32 mm 13 mm	VF 409 VF 410 VF 411 VF 412
75	6 mm	0.25"	2.5	13 mm	VF 413
100	6 mm	0.25"	2.5	13 mm	VF 414
Cable for all these BNC / Microdot transducers. Contact us for other lengths or impedances. * Transducers designed to generate surface waves in steel, titanium, and similar high-speed materials.