Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Communication Transducer

Communication TransducerCommunication TransducerCommunication TransducerCommunication TransducerCommunication TransducerCommunication TransducerCommunication Transducer

BII-7510 Communication Transducer

BII-7510 series are broadband (low Q) communication transducers for uses in voice and message channels underwater, which is designed for analog and digital communication underwater.

Carrier frequencies of 5 to 250 kHz are covered to support long range low bit-rate and short range high bit-rate communication underwater. The information can be exchanged from 10km to 10m. Omnidirectional, conical and fan-shaped beams are available for horizontal, vertical, omnidirectional and directional communication underwater.

Besides, please refer to the following hemispherical/spherical and conical beam transducers for underwater communication:
BII-7500   High Power Broadband Piston Transducer BII-7520   Omnidirectional Transducer: 10 to 150 kHz
BII-7700   Hemispherical Transducer: 10 to 150 kHz BII-7670   Underwater Beaconing Transducer: 24 to 45 kHz
BII-7680   Single Beam Transducer without Sidelobes: 24 to 70 kHz BII-7730   High Power Broadband Transducer: 10 to 200 kHz
Pulsed FSK, Chirp-type FSK, Frequency Hopping DSSS

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.

Suggested Application  
Remote Control and Telemetry
Horizontal & Vertical Communication
Artificial Acoustic Target
Echo-Repeater Target, Active-Acoustic Target
Acoustic Deterrent to Marine Animals
Playback Marine Animal Voices/Calls/Whistles/Songs/Clicks
Underwater Acoustic Network
Diver Communication
Pinger/Locator/Transponder/Beacon/Acoustic Release
LBL/SBL/USBL/Acoustic Positioning/Tracking
Underwater Telephone
Marine Animal Behavior Research, Bioacoustic Stimuli
5 to 250 kHz Sounds
Broadband or Low Q
High Power
Omni/Hemispherical Beam
Conical/Fan-shaped Beam
Thru-hole, Bolt Fastening, End-face Mounting
Related Products  
BII-2100 Transmitting & Receiving Switch
BII-5000 Power Amplifier
BII-6000 Impedance Matching & Tuning
BII-8030 Acoustic Transmitter
BII-8080 Transmitting & Receiving System
Sonar Signal Generation


Note: -3dB Bandwidth = fs/Q.  fs: Resonant frequency; Q: Quality Factor. TVR, OCV and Beamwidth are specified at fs. TVR: dB µPa/V@1m; OCV: dB V/µPa; Voltage Rating: Maximum Driving Voltage (Vrms); BW HxV: Beamwidth HorizontalxVertical.

fs kHz Q TVR
Voltage Rating Beam BW HxV Size
BII-7517 6 3 TVR -177.1 300 Cylindrical Omnix80° Φ141x75
BII-7516 8 1.2 TVR -180.0 300 Cylindrical Omnix80° Φ115x53
BII-7511 14 1.0 TVR -186.0 300 Cylindrical Omnix80° Φ89x53
BII-7515 20 2.0 TVR -189.0 300 Cylindrical Omnix80° Φ60x45
BII-7512 30 1.3 TVR -183.5 300 Cylindrical Omnix80° Φ60x55
BII-7513 40 1.5 TVR -194.0 300 Cylindrical Omnix80° Φ48x48
BII-7518 50 3 141.4 -195.5 300 Cylindrical Omnix80° Φ33x30
fs kHz Q TVR OCV Voltage Rating Beam BW Size
BII-7511CB 22 6 138.0 -187.0 600 Conical 90° 60x93
BII-7512CB 25 6 139.5 -189.0 600 Conical 90° 48x85
BII-7513CB 30 6 TVR -173.2 600 Conical 90° 42x75
BII-7514CB 50 3 146.8 -180.0 600 Conical 50° 42x50
BII-7515CB 70 3 149.0 -182.0 600 Conical 36° 42x40
BII-7517CB 100 3 TVR -175.0 600 Conical 25° 48x30
BII-7518CB 150 3 TVR -182.8 600 Conical 25° 42x27
BII-7519CB 200 3 TVR -189.5 600 Conical 25° 33x25
Note: Besides default BW, customized BW is available upon request.

fs kHz Q TVR OCV Voltage Rating Beam BW HxV Size
BII-7515FB 50 3 141.0 -170.0 600 Fan-shaped 20°x60° 90x35x36
BII-7516FB 70 3 145.0 -183.0 600 Fan-shaped 20°x60° 65x30x30
BII-7517FB 100 3 146.6 -190.0 600 Fan-shaped 20°x60° 48x25x25
BII-7518FB 150 3 TVR -192.0 600 Fan-shaped 30°x65° Φ42x27
BII-7519FB 200 3 155.0 -195.0 600 Fan-shaped 30°x65° Φ33x25
Note: Besides default BW, customized BW is available upon request.
Miscellaneous: BII-7510 Series Transducer
Note: The sensitivity is tested with 0.1m cable. The sensitivity with long cable will be lower.
Depth Rating: default: 300m.
Deep Water: BII customizes the depth rating of the transducer upon request (upto 950m), please contact BII for details. To order customized Deep Water model, append DW to the 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.
Impedance Matching: Custom BII-6000: 4Ω to 16Ω, 50Ω, 75Ω, 100Ω, etc..., Not included, order separately, Append IM to part number.
TR Switch: BII-2100 Transmitting & Receiving Switch. Not Included. Order Separately, Append TR to part number.
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 (THFH)

Click 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-751xTR and BII-751xTRIM.
Connector: 1. Default: Wire Leads (WL)
2. Underwater Mateable Connector (UMC)
3. MIL-5015 Style (5015)
4. Custom (custom)
Operation Temperature: -10 to +60°C
Storage Temperature: -40 to +60°C
How to Order: Click How to Order.
Transducer Wiring: Click Transducer Wiring for detailed wiring information.
Transmitting Array: Array & Aperture Design

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