Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Omnidirectional Transducer

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BII-7520 Omnidirectional Transducer

BII-7520 series spherical transducers ranging from 10kHz to 1MHz provide omnidirectional transmitting and receiving voltage response and broadband response, and can be used in communication, FM/Chirp Sonar, artificial target, etc...

With suitable mounting options, BII-7520s can be installed on hulls or frames as a transmitting and receiving array such as linear, planar or cylindrical array. Working with BII T/R Switches which have built-in preamplifiers and custom high pass filters, the array can drive long cables and eliminate the unwanted ship or ambient noise before beam-steering and amplitude shading.

Optional mounting parts are available for installation on portable-mounting apparatus, submersibles, pipe, tank or vessel.

Suggested Application    
Hull-mounted Array: Linear/Planar/Cylindrical Array
Fixed Array and Drifting Array
Underwater Digital & Analog Communication
Underwater Telephone
Artificial Acoustic Target
Echo-Repeater Target
Active-Acoustic Target
Underwater Vehicles: AUV/UUVs and ROVs
Pinger, Locator, Transponder, Tracking
Underwater Beaconing Transducer
Acoustic Positioning: LBL, SBL, USBL
Acoustic Deterrent to Marine Animals
Synthesize Marine Animal Sounds, Acoustic Stimuli
Forward-looking Navigation Sonar
10 to 1MkHz
Omnidirectional Beam
Deep Water
Array Element
Easy Mounting
Related Products    
BII-5000 Power Amplifier
BII-6000 Impedance Matching and Tuning Unit
BII-2100 Transmitting & Receiving Switch
BII-7000 Broadband Omnidirectional Hydrophone/Projector.
BII-8030 Underwater Acoustic Transmitter
BII-8080 Transmitting and Receiving System
BII-7700 Hemispherical Transducer.
Sonar Signal Generation


Transducer Frequency
dB µPa/V@1m
dB V/µPa
Q Beam Width
ΦD mm
BII-7521 85 TVRBP -200.8 4 TVRBP 300m 950m 35
BII-7526 60 149.0 -199.5 4 Omnix265° 300m 950m 38.5
BII-7526/1000 1000 150.7 -201.2 4 Omnix230° 300m 950m 38.5
BII-7524 48 TVRBP -199.2 4 TVRBP 300m 950m 46
BII-7524BB 45
3 Omnix260° 300m 950m 46
BII-7522 35 TVRBP -193.5 4 TVRBP 300m 950m 60
BII-7522/500 500 155.6 -195.0 4 Omnix230° 300m 950m 60
BII-7522BB 30
TVRBP -195.0
2 TVRBP 300m 950m 60
BII-7523 25 TVRBP -185.0 4 TVRBP 300m 950m 69
BII-7527 20 148.0 -191.6 4 Omnix260° 300m 500m 80
BII-7527/300 300 150.3 -195.6 4 Omnix240° 300m 500m 80
BII-7527BB 15
TVRBP -185.0
2 TVRBP 300m 500m 80
Note: Bandwidth = fr/Q.  Q: Quality Factor of the Transducer. 
Miscellaneous: BII-7520 Series Transducer
Beam Pattern: Spherical, Omnidirectional.
Maximum Drive Voltage: 300 Vrms
Duty Cycle: 1% at Maximum Power or Maximum Driving Voltage.
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.
Deep Water: To order Deep Water model, append DW to the part number.
For example, BII-7521DW is of 950m depth rating; BII-7521 is of 300m depth rating.
Impedance Matching: Custom-made BII-6000: 4 to 16Ω, 50Ω, 60Ω, 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 (THMFH)
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-752xTR and BII-752xTRIM.
Connector Options: 1. Default: Wire Leads (WL)
2. Underwater Mateable Connector (UMC)
3. MIL-5015 Style (5015)
4. Custom (custom)
Operating 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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