Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

High Power Broadband Transducer and Array

BII-7730s are high power broadband transducers and array with conical or fan-shaped beam and wide available frequency range from 10 to 200 kHz for uses in sub-bottom profiling, communication, navigation, positioning, echosounding, fishery, bioacoustics ...

BII-7730s feature broadband and customization on beamwidth, operating frequency and array pattern, and offer flexible, custom-made and low cost solutions to special transducer demanding in underwater acoustics.

Bigger array can be achieved with multiple BII-7730s: parametric array, direction-finding Sonar, multi-beam Sonar, amplitude shading (sidelobe suppression), etc...

Besides being used in active Sonar, BII-7730s can also be used in passive Sonar (listening sounds ONLY).

Optional mounting parts are available for installation on portable-mounting apparatus, submersibles, pipe, tank or vessel.
An impedance matching transformer is optional to provide correct impedance match to load requirements of power amplifiers.
A Transmit & Receive Switch is available to be integrated inside transducer for amplifying the received sounds and driving long cable.

One-way Configuration: Transmission or Reception.
Two-way Configuration:
Transmission and Reception. Transmit & Receive switch BII-2100 is available from BII.

BII-7730   High Power Broadband Transducer (10 to 200 kHz)

Suggested Application  
Parametric, Linear, Planar & Cylindrical Array
Fixed Array & Drifting Array
Seabed Penetration/Sediment Profiler/Sub-bottom Profiling
Direction-finding Sonar/Multi-beam Sonar
Artificial Acoustic Target
Echo-Repeater Target, Active-Acoustic Target
High Resolution Sonar, Chirp/FM Sonar
Navigation, Obstacle Avoidance
Projector Array in Multibeam Sonar System
Underwater Robotic and Vehicle (ROV, AUV, UUV)
Long Rang Transmission
Pinger/Locator/Transponder/Acoustic Positioning/Tracking
Underwater Communication and Telephone
Fishery Sonar, Bioacoustics, Marine Animal Behavior Research
Acoustic Deterrent to Marine Animals, Bioacoustic Stimuli
Playback Marine Animal Voices/Calls/Whistles/Songs

Features Related Products

Frequency Available: 10 to 200 kHz
High Power: Up to 1200W
Broadband, Low Qm
Conical, Fan-shaped Beam
Customized on Beamwidth, Array Pattern
Customized on Operating Frequency

BII-2100 Transmitting & Receiving Switch
BII-5000 Power Amplifier
BII-6000 Impedance Matching and Tuning
BII-8030 Underwater Acoustic Transmitter
BII-8080 Transmitting & Receiving System
Sonar Signal Generation


Resonant Frequency fr: Available from 10 to 200 kHz, Customized.
TVR @fr (dB µPa/V@1m): ≥ 160
Quality Factor Q: 3 to 5 (typical 3.5), Note: -3dB bandwidth of TVR = fr/Q
Receiving Sensitivity (dB V/µPa): ≥ -195.0
Beam Pattern: Conical Beam or Fan-shaped Beam
Transducer Structure: Single, Dual, or Bespoke Array.
-3dB Beam Width (One Way): ≥ 577°kHz/fr, fr in kHz. Customized.
-3dB Beam Width (Two Way): 0.718*One-Way Beamwidth
Side Lobe Level (dB) (One Way): ≤ -17.7
Side Lobe Level (dB) (Two Way): ≤ -35.4
Maximum Drive Voltage: 600 Vrms
Maximum Housing Diameter: ΦD ≤ 168 mm
Depth Rating: 1. Default: 100 m (Blank)
2. 500m (DW)
Note: 500m depth rating is not available to some parameter combinations. BII shall contact you if 500m depth rating is not supported to your specified transducer.
Weight in Air: > 1 kg
Impedance Matching: BII-6000: 4 to 16Ω, 50Ω, 60Ω, 75Ω, 100Ω,... Not included, Order separately.
Customized to optimum load of the power amplifier, Append IM to part number.
TR Switch: BII-2100 Transmitting & Receiving Switch.
Not Included. Order Separately, Append TR to part number.
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.
Mounting Options: 1. Default: Free Hanging (FH)
2. Free-hanging with Male Underwater Connector (FHUWC)

3. Thru-hole Mounting with Single O-ring (THSO)
4. Thru-hole Mounting with Double O-ring (THDO)
5. Bolt Fastening Mounting (Stainless Steel): (BFMSS)
6. End-face Mounting: (EFM)
7. Thru-hole Mounting + Free Hanging (THMFH)
8. Flange Mounting: (FGM)

Transducer and Hydrophone Mounting for more detailed information on mounting/installation.
Cable: 1. Shielded Cable (SC)
2. Wire/Cable Bundle (WCB): ONLY for Thru-hole Mounting with BII-7730TR and BII-7730TRIM.
Connector: 1. Default: Wire Leads (WL)
2. Underwater Mateable Connector (UMC)
3. MIL-5015 Style (5015)
4. Custom (custom)
Operating Temperature: -10°C to +60°C
Storage Temperature: -40°C to +60°C
Transducer Wiring: Click Transducer Wiring for detailed wiring information.
Transmitting Array: Array & Aperture Design
How to Order  BII-7730 Series Transducers
BII-7730 xx xx /xx /xx or /xxXxx -xx -xx -xx -xx -xx
Transducer Blank
fr Frequency
in kHz
-3dB Beamwidth
in Degree
Matching Impedance
in Ω 
Mounting Cable Length
in meter
Cable Connector
Example of Part Number: Description
BII-7730/30/20-THSO-0.1-SC-WL BII-7730 transducer, 30kHz, 20° Conical Beamwidth, Thru-hole Mounting (Single O-ring), 0.1m Shielded Cable, Wire leads.
BII-7730/100/5X120-THSO-0.1-SC-WL BII-7730 transducer, 30kHz, 5°x120° Fan-shaped Beamwidth, Thru-hole Mounting (Single O-ring), 0.1m Shielded Cable, Wire leads.
BII-7730DW/200/3-THSO-0.1-SC-WL BII-7730 transducer, 500m depth rating, 200kHz, 3° Conical Beamwidth, Thru-hole Mounting (Single O-ring), 0.1m Shielded Cable, Wire leads.
BII-7730DW/200/3X90-THSO-0.1-SC-WL BII-7730 transducer, 500m depth rating, 200kHz, 3°x90° Fan-shaped Beamwidth, Thru-hole Mounting (Single O-ring), 0.1m Shielded Cable, Wire leads.
BII-7730IM/30/20-67-FH-1.0-SC-UMC BII-7730 transducer, Built-in Impedance Matching, 30kHz, 20° Conical Beamwidth, 67Ω, Free Hanging, 1m Shielded Cable, Underwater Mateable Connector.
BII-7730TRIM/30/20-67-FH-1.0-SC-WL BII-7730 transducer, Built-in TR Switch and Impedance Matching, 30kHz, 20° Conical Beamwidth, 67Ω, Free Hanging, 1m Shielded Cable, Wire Leads.

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