| Code | Frequency | Focal length | Element size | Interface type |
|---|---|---|---|---|
| UFD-S□L□E□F□ | 1.0MHz (S1), 2.0MHz (S3), 4.0MHz (S5) | 5mm (L1), 10mm (L2), 15mm (L3), 20mm (L4), 25mm (L5), 30mm (L6) | 7×10mm (E7) | C5 (F3) |


Suitable for detecting defects near the surface and detecting parallel surfaces or near-parallel surfaces
Two element, one transmitter and one receiver
Vertical incident longitudinal wave detection by direct probe contact with the workpiece surface
The contact surface is made of hard wear-resistant material, which matches well with the metal acoustic impedance, high sensitivity and strong penetration
High near-surface resolution, small blind zones
Higher sensitivity can be obtained in the focal length range
| Code | Frequency | Focal length | Element size | Interface type |
|---|---|---|---|---|
| UFD-S□L□E□F□ | 1.0MHz (S1), 2.0MHz (S3), 4.0MHz (S5) | 5mm (L1), 10mm (L2), 15mm (L3), 20mm (L4), 25mm (L5), 30mm (L6) | 7×10mm (E7) | C5 (F3) |
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