DFR FINGERTIP
Delay-Line Transducers
Part Numbers
| Frequency (MHz) | Element Diameter | Part Number | Delay 10-PK | Delay 10-PK | Accessories | |
|---|---|---|---|---|---|---|
| inch | mm | HR* | L=0.38 in (10 mm) | L=0.50 in (12.7 mm) | ||
| 2.25 | 0.25 | 6.4 | 00-010940 | 01-010810 | 01-010811 | |
| 0.5 | 12.7 | 00-012301 | 01-011971 | 01-011973 | ||
| 3.5 | 0.25 | 6.4 | 00-010824 | 01-010810 | 01-010811 | Cable |
| 0.5 | 12.7 | 00-010941 | 01-011971 | 01-011973 | MD – BNC | |
| 5 | 0.25 | 6.4 | 00-010246 | 01-010810 | 01-010811 | 6-ft (1.83 m) |
| 0.5 | 12.7 | 00-010492 | 01-011971 | 01-011973 | 07-010012 | |
| 10 | 0.25 | 6.4 | 00-010247 | 01-010810 | 01-010811 | |
| 0.5 | 12.7 | 00-012302 | 01-011971 | 01-011973 | ||
| 15 | 0.25 | 6.4 | 00-011077 | 01-010810 | 01-010811 |
| Frequency (MHz) | Element Diameter | Part Number | Delay 10-PK | Accessories | |
|---|---|---|---|---|---|
| inch | mm | HR* | L=0.41 in (10.4 mm) | ||
| Nominal 20MHz | 0.125 | 3.2 | 00-012300 | 01-011974 | See above |
Case Dimensions
| Element Diameter | A | B | C | ||||||
|---|---|---|---|---|---|---|---|---|---|
| inch | mm | 0.38 in. Delay | 0.50 in. Delay | ||||||
| 0.125 | 3.2 | 0.50 in. | 12.7 mm | 0.83 in. | 21.1 mm | 0.95 in. | 24.1 mm | 0.30 in. | 7.6 mm |
| 0.25 | 6.4 | 0.50 in. | 12.7 mm | 0.83 in. | 21.1 mm | 0.95 in. | 24.1 mm | 0.30 in. | 7.6 mm |
| 0.5 | 12.7 | 0.88 in. | 22.4 mm | 1.15 in. | 29.2 mm | 1.15 in. | 29.2 mm | 0.60 in. | 15.2 mm |
| Mini-DFR | |||||||||
| 0.125 | 3.2 | 0.41 in. | 10.4 mm | 0.77 in. | 19.6 mm | 0.19 in. | 4.8 mm |
DFR Fingertip Delay-Line Transducers
Model DFR are small-diameter delay-line transducers with side-mounted microdot connectors. Removable delay lines and highly damped piezoceramic elements enable measurement of very thin parts or detection of small near-surface flaws. Delay lines can be contoured for improved coupling to I.D. or O.D. curved parts. DFRs are available in HR Series* which are specialized applications requiring high resolution. Custom sizes and shapes also available upon request.
Delay-line contacts are single-element, longitudinal-wave (straight beam) transducers designed for detection of near-surface flaws and thickness measurement of thin-section materials. Replaceable delay lines (stand-offs) improve near-surface resolution and extend service life.
Typical Applications
- Thickness Gauging
- Plates
- Bars & Pipes
- Tanks
Key Benefits
- Replaceable delay lines for extended transducer life
- Can be used on higher temperature parts without damaging the transducer
- Effective in small-flaw detection
- Thickness Gauging on thin parts
Series
*HR Series – High Resolution series of transducers are highly damped and recommended for applications where enhanced axial and near-surface resolution are more important. Generally includes thickness measurement and near-surface flaw detection. HR series have less sensitivity and the GP or C series with -6db frequency bandwidth of 50-100% range.
