SONOSCAN CFC / CF
Probes for Non-Contact Ultrasonic Testing
Due to the strong damping properties of air, low frequencies in the kHz range are used in air-coupled ultrasonic testing. It is therefore all the more important that the ultrasonic transducers offer a particularly high sensitivity in order to ensure high penetration and improved resolution. We achieve this, among other things, by installing preamplifiers in the receiver probe as well as by using our own Piezocomposite Technology, which enables a flexible use of the matching materials in our CFC and CF probes.
Advantages at Glance
- Extremely high sensitivity
- Inherent noise of < 1 nV/√Hz
- Very good signal-to-noise ratio due to amplifier dynamic range up to 120 dB
- Different apertures available
Key Features of SONOAIR
- Non-contact ultrasonic inspection
- Inspection of modern fibre composites (GFRP and CFRP)
- 1 or 4 channels
Applications
Piezocomposite Transducers made in Germany
The powerful probes of the SONOSCAN CFC series are specially designed for air-coupled Ultrasonic Testing with the SONOAIR inspection system. The 230 kHz ultrasonic probes with stainless steel housing and composite transducers are available with apertures of 12 mm, 19 mm and 25 mm. Transmitter and receiver are coordinated separately. The receiver is available with an integrated preamplifier or as a passive version.
Types
| Type | Frequency | Transducer Size | Environment Temperature |
|---|---|---|---|
| SONOSCAN CFC 230-D12 | 230 kHz | Ø 12 mm | 0 °C ... +40 °C |
| SONOSCAN CFC 230-D19 | 230 kHz | Ø 19 mm | 0 °C ... +40 °C |
| SONOSCAN CFC 230-D25 | 230 kHz | Ø 25 mm | 0 °C ... +40 °C |
Robust and Wear-Free
The highly sensitive Piezo-composite Probes are especially designed for the use with Air-coupled Ultrasonic Testing. The robust and wear-free Ultrasonic Transducers with stainless steel housing are available in frequencies from 50 kHz to 400 kHz.
Types
| Type | Nominal frequency | Environment temperature |
|---|---|---|
| SONOSCAN CF 050 | 50 kHz | -40 °C to 60 °C |
| SONOSCAN CF 075 | 75 kHz | -40 °C to 60 °C |
| SONOSCAN CF 125 | 125 kHz | -40 °C to 60 °C |
| SONOSCAN CF 200 | 200 kHz | -40 °C to 60 °C |
| SONOSCAN CF 300 | 300 kHz | -40 °C to 60 °C |
| SONOSCAN CF 400 | 400 kHz | -40 °C to 60 °C |
| SONOSCAN CF 400 3E | 400 kHz (3 elements) | -40 °C to 60 °C |
Air-coupled ultrasonic testing provides the flexibility to display measurement results via A-, C- or D-scans. In addition, the raw data is available for post-processing. The below C-scans represent a combined color-coded image consisting of the maximum amplitudes of each individual measurement point (A-scans). The smallest detectable defect size and the level of ultrasound conductivity highly depend on the material characteristics, the expected defect type, the test frequency, the measurement resolution and the scanning speed. The sample scans have been recorded with SONOAIR R&D and a resolution of 1 mm x 1 mm and a scan speed of 100 mm/s.
C-Scan of Bonded Plastic Plates
Test method: Transmission
Type of defect: air inclusions and incomplete adhesive adhesion
Probe: CF400
Defect size: min. Ø 2 mm
C-Scan of Honeycomb Composite with CFRP Layers
Test method: Transmission
Types of defects: impact damage and delaminated top layer
Probe: CFC230_D25_P65
C-Scan of Ceramics
Test method: Transmission
Type of defects: delamination and density fluctuations before and after the sintering process
Probes: CF 075 and CF 125
Test method: Transmission
Type of defects: air pockets, electrolyte distribution
Probes: CF400
![[Translate to USA:] Cooperation with the ultrasonic research center “Forschungszentrum Ultraschall (FZ-U)”](/fileadmin/_processed_/3/1/csm_ndt-sonoair-non-contact-ultrasonic-testing-sonotec_12c7636ca5.jpg)
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