BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System
High Power Piston Transducer
BII's piston transducers
are made from Tonpilz (Langevin, Sandwich, Transmission Line)
elements with features of high power, medium Qm, and low frequency.
Custom-fit array can be set up with multiple
transducers in field to increase sound level and achieve narrow beam.
Some typical transducers are listed below, bespoke transducers with
customized resonant frequency fs and radiation area are available.
BII-7500 Series High Power Piston Transducer: Low Frequency
| Typical Applications | |
| Array Element: Parametric, Linear, Planar & Cylindrical Array | Echosounding, Navigation, Obstacle Avoidance, Long Rang Transmission |
| Seabed Penetration/Sediment Profiler/Sub-bottom Profiling | Synthetic Aperture Imaging and Synthetic Aperture Sequential Imaging |
| Artificial Acoustic Target, Echo-Repeater | Underwater Communication and Telephone |
| Pinger/Locator/Transponder/Positioning/Tracking | Fishery Sonar, Bioacoustics, Marine Animal Behavior Research |
| Direction-finding Sonar/Multi-beam Sonar | Acoustic Deterrent to Marine Animals, Bioacoustic Stimuli |
| Related Products | |
| BII-7560 Echo Sounder Transducer, Low Q. | BII-7540 Parametric Array Transducer: Sediment Profiling |
| BII-5000 Power Amplifier | BII-8030 Underwater Acoustic Transmitter |
| BII-7620 Directional Low Frequency Transducer | BII-8080 Transmitting & Receiving System |
| Specification |
| Transducer Document | fs (kHz) | -3dB Beam Width | Qm | Size: ΦDxH mm | Weight (kg) |
| BII-7501/50 | 50&107 | 46° & 23° | 5 & 10 | Φ48x65 | 0.5 |
| BII-7501Q/60 | 60 | 49° | 6 | Φ42x48 | 0.4 |
| BII-7502/3.5 | 3.5 | 170° | 7 | Φ60x160 | 2.6 |
| BII-7502/6 | 6 | 156° | 7 | Φ60x125 | 1.8 |
| BII-7502/9 | 9 | 144° | 6 | Φ60x144 | 1.5 |
| BII-7502/12 | 12 | 132° | 6 | Φ60x115 | 1.4 |
| BII-7502/15 | 15 | 120° | 6 | Φ60x115 | 1.3 |
| BII-7502/18 | 18 | 107° | 6 | Φ60x100 | 1.2 |
| BII-7502/23 | 23 | 87° | 5 | Φ60x96 | 1.2 |
| BII-7502/28 | 28 | 67° | 6 | Φ60x100 | 1.2 |
| BII-7502/38 | 38 | 47° | 5 | Φ60x75 | 0.9 |
| BII-7502/60 | 60 | 30° | 3.5 | Φ60x50 | 0.8 |
| BII-7503/3.5 | 3.5 | 170° | 5.5 | Φ89x190 | 3.6 |
| BII-7503/5 | 5 | 149° | 4 | Φ89x144 | 2.4 |
| BII-7503/6 | 6 | 143° | 4 | Φ89x144 | 2.5 |
| BII-7503/8 | 8 | 140° | 6 | Φ89x122 | 2.2 |
| BII-7503/12 | 12 | 105° | 4 | Φ89x122 | 2.3 |
| BII-7503/15 | 15 | 87° | 5 | Φ89x122 | 2.5 |
| BII-7503/60 | 60 | 20° | 4 | Φ89x50 | 2.0 |
| BII-7506/3.5 | 3.5 | 136° | 4 | Φ168x160 | 16 |
| BII-7506/6 | 6 | 106° | 4 | Φ168x125 | 13 |
| BII-7506/9 | 9 | 69° | 4 | Φ168x100 | 11 |
| BII-7506/12 | 12 | 48° | 4 | Φ168x115 | 10 |
| BII-7506/15 | 15 | 40° | 4 | Φ168x110 | 9 |
| BII-7506/18 | 18 | 32° | 4 | Φ168x100 | 7 |
| BII-7506/20 | 20 | 30° | 4.1 | Φ168x100 | 7 |
| BII-7506/23 | 23 | 25° | 4.3 | Φ168x96 | 7.6 |
| BII-7506/28 | 28 | 20.4° | 5 | Φ168x95 | 6.6 |
| BII-7506/38 | 38 | 15° | 5 | Φ168x70 | 5.8 |
| BII-7506/50 | 50 | 11.5º | 3.5 | Φ168x55 | 5.0 |
| BII-7506/60 | 60 | 9.6° | 4 | Φ168x50 | 4.6 |
|
Attenuation/absorption coefficient of sediments is frequency
dependent around 0.06f to 0.6f (dB/(m*kHz)). |
| Custom-fit transducers: | Please contact BII for bespoke transducers. |
| -3dB Bandwidth: |
-3dB Bandwidth = fs/Qm; Qm: Quality Factor
without Tuning. The quality factors Qm listed above are original without impedance matching. |
| Driving Signal: | Pulsed and burst SINE/Square/Chirp/FM excitation, CW. |
| Depth Rating: | 1. 50 to 300 m, refer to respective datasheet; 2. Customized, Contact BII. |
| Beam Pattern: | Conical |
| Side lobes: | If -3dB one-way beam width ≥ 49°, No side lobes; If -3dB one-way beam width < 49°, Side lobe level < -17.7 dB. |
| Side lobe suppression: | Available for BII-7506/60 ONLY: ≤-30 dB. |
| Temperature Sensor: |
1. Default: No built-in temperature sensor. 2. Built-in temperature sensor. When ordering, append TS to part number for integrating a temperature sensor in the transducer. Click Temperature Characteristics for more information. |
| Impedance Matching: |
BII-6010 Bespoke Impedance Matching between transducers
and power amplifiers. Order Separately. Append IM to the part number listed above for integrating BII-6010 in the transducer. |
| TR Switch: | BII-2100 Transmitting & Receiving Switch. Not Included. Order Separately, Append TR to part number. |
| Information: | Acoustic Components and System: Installation/Mounting, Ordering, Wiring, Array & Aperture Design and much more. |