TOFD Probes and Wedges: Ultrasound Time-Of-Flight Diffraction Accesories
What is the TOFD?
TOFD is "Time-Of-Flight Diffraction", which is based on Huygens Diffraction Principle. It's a Nondestructive Testing method with ultra-high accuracy.TOFD testing is usually used for confirming the location, characteristics and evaluation of defects in the material. This method utilizes the symmetrical arrangement of two transmitting and receiving probes to capture diffraction signals from defect tips.
As we can see in the picture, when the ultrasonic waves encounter defects or interfaces between different midium within a mterial, diffraction occurs, altering the wave's propagation path and time. By measuring the time difference between the transmission and reception of the ultrasonic waves, the location and size of the defects can be identified.
Product Overview
YUSHI TOFD Probes and Wedges adopt "Time of Flight Diffraction Technology"to locate, size and evaluate the defects in tested materials.They can perfectly achieve the requirements in precise inspection for many industrial fields.
- Frequency Range:2.25-15Mhz
- Element Size Range:3mm-13mm/ 0.125in-0.5in
- Thread Size: 3/8-32in, 11/16-24in
- Compatible Wedge Model: ST1, ST2
Advantages of YUSHI TOFD Probes
When YUSHI TOFD probes are connected with the wedges, they will transmitt the ultrasonic wave that will diffract at the lower tips or upper tips of the defects and the bottom of the material.The time difference between the trasmitting and received signals will directly indicate the localization and characteristic of the cracks, inclusions or other flaws.
YUSHI TOFD probes' key advantges include:
- High Sensitivity and High Bandwidth: YUSHI TOFD probes adopt composite elements for higher accuracy and high bandwidth.
- Quick-release Type Wedges: YUSHI TOFD probes are connected with quick-release type wedges, which make the measurement more convenient.
- Excellent Signal-to-Noise Ratio:The probes are longitudinal wave probes with high damping characteristics. This can help to the ability for distinguishing the back echo from the noise.
- Efficient Weld Inspection: YUSHI TOFD probes with high accuracy can greatly increase the efficiency of weld inspection.
- Great Durability: Wedges feature wear-resistant pins, integrated water nozzles for coupling and side slots for debris management.
Applications of TOFD Probes
TOFD Probes Specifications
TOFD Probes
| Probe Specifications | |||||
| Frequency | Element Size | Probe Model | Thread | Compatible Wedge Model | |
| MHz | mm | in | in | ||
| 2.25 | 6 | 0.25 | TF2.25C6 | 3/8-32 | ST1 |
| 10 | 0.375 | TF2.25C10 | 11/16-24 | ST2 | |
| 13 | 0.5 | TF2.25C13 | 11/16-24 | ST2 | |
| 3.5 | 6 | 0.25 | TF3.5C6 | 3/8-32 | ST1 |
| 10 | 0.375 | TF3.5C10 | 11/16-24 | ST2 | |
| 5 | 3 | 0.125 | TF5C3 | 3/8-32 | ST1 |
| 6 | 0.25 | TF5C6 | 3/8-32 | ST1 | |
| 10 | 0.375 | TF5C10 | 11/16-24 | ST2 | |
| 13 | 0.5 | TF5C13 | 11/16-24 | ST2 | |
| 7.5 | 3 | 0.125 | TF7.5C3 | 3/8-32 | ST1 |
| 6 | 0.25 | TF7.5C6 | 3/8-32 | ST1 | |
| 10 | 3 | 0.125 | TF10C3 | 3/8-32 | ST1 |
| 6 | 0.25 | TF10C6 | 3/8-32 | ST1 | |
| 15 | 3 | 0.125 | TF15C3 | 3/8-32 | ST1 |
| Note:LEMO 00 and Microdot connectors are optional. | |||||
Wedges
| ST1 Wedges Specifications | ||||||||
| Wedge Model | β(°) | A | B | C | Thread Size | |||
| Steel | mm | in | mm | in | mm | in | in | |
| ST1-L45-IHC | 45 | 32 | 1.26 | 21 | 0.83 | 13 | 0.51 | 3/8-32 |
| ST1-L60-IHC | 60 | 32 | 1.26 | 21 | 0.83 | 13 | 0.51 | |
| ST1-L70-IHC | 70 | 32 | 1.26 | 21 | 0.83 | 13 | 0.51 | |
| ST2 Wedges Specifications | ||||||||
| Wedge Model | β(°) | A | B | C | Thread Size | |||
| Steel | mm | in | mm | in | mm | in | in | |
| ST2-L45-IHC | 45 | 32 | 1.26 | 28.5 | 1.1 | 18.5 | 0.73 | 11/16-24 |
| ST2-L60-IHC | 60 | 32 | 1.26 | 28.5 | 1.1 | 18.5 | 0.73 | |
| ST2-L70-IHC | 70 | 32 | 1.26 | 28.5 | 1.1 | 18.5 | 0.73 | |
About Our Company-YUSHI Instruments
YUSHI INSTRUMENTS was founded in 2011,it is a high-tech enterprise focusing on the R&D and manufacturing of NDT equipment, and is committed to independent innovation and R&D of NDT.
In the field of NDT for more than ten years, YUSHI has developed 8 categories of products with independent intellectual property rights: including ultrasonic thickness gauge, digital ultrasonic flaw detector, Leeb hardness tester, ultrasonic pulse generator and receiver, black and white densitometer, UV lamp,X-ray film viewer, coating thickness gauge,ultrasonic probe, test block, cable, etc.
And has obtained a number of patents, including 1 invention patent, 5utility model patents, 2 appearance design patents and 26 software copyrights.
