Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Low Frequency Underwater Transducer

 Low Frequency Underwater TransducerLow Frequency Underwater TransducerLow Frequency Underwater TransducerLow Frequency Underwater TransducerLow Frequency Underwater TransducerLow Frequency Underwater TransducerLow Frequency Underwater Transducer

Benthowave's low frequency underwater transducers are designed for uses in ocean noise simulation, underwater communication, bioacoustics (marine mammals and fish sounds/behavior), education and generation of sound fields.

With underwater supportive mounting apparatus, multiple BII-7530 transducers can be set up to be a low-frequency linear or planar array to produce higher underwater sound level.

Besides usable frequency range stated in specs, BII-7530 also transmits quality sound from 100 to 600Hz with lower sound level which drops at 12dB/octave.

Optional mounting parts are available for easy and simple 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.

Low Frequency Underwater Transducer     Low Frequency Underwater Transducer        Low Frequency Underwater Transducer

BII-7530 Series    Low Frequency Underwater Transducer

Suggested Application  
Dipole, linear, Planar Arrays
Acoustic Deterrent to Marine Animals
Ocean Noise Simulation: Vessel/Ship Traffic/Construction/Dredging...
Marine Animal Behavior Research, Bioacoustic Stimuli
Playback Marine Animal Voices/Calls/Whistles/Songs
Diver Recall System, Underwater Voice Communication
Long Range Sound Transmission
Artificial Acoustic Target
Audio Entertainment in Aquarium and Swimming Pool
Generation of Plane Wave/Standing Wave/Pressure/Acceleration Field

Features Related Products
Frequency Range: 600Hz to 15kHz
Support Array Set-up to Boost Source Level
Easy Installation
Radiation Face: Front & Rear Face or Bottom Face
BII-5000 Power Amplifier
BII-6000 Impedance Matching and Tuning Unit
BII-8030 Underwater Acoustic Transmitter
Sonar Signal Generation


Low Frequency Transducer BII-7531 BII-7533 BII-7536 BII-7537
TVR (µPa/V@1m): TVR TVR TVR 120.3
Usable Frequency: 600Hz to 15kHz 600Hz to 7kHz 600Hz to 7kHz 600Hz to 7kHz
Radiation Face Plane Plane Plane Plane & Cylinder
Impedance: ≥ 1 kΩ ≥ 1 kΩ ≥ 1 kΩ ≥ 1 kΩ
Maximum Drive Voltage (Vrms): 500 500 500 380
Operating Depth: ≤ 150 m
≤ 150 m ≤ 150 m ≤ 100 m
Size (Front & Rear Radiation): ΦDxH = 60x40mm ΦDxH = 114x40mm ΦDxH = 168x40mm N/A
Size (Bottom Radiation): ΦDxH = 60x25mm ΦDxH = 114x25mm ΦDxH = 168x25mm N/A
Size (Bottom & Cylinder Radiation): N/A N/A N/A ΦDxH = 60x64mm
Weight in Air: 160 grams 867 grams 1300 grams 230 grams
Radiation Face:   Options:
1. Front & Rear: Add /FR to the listed part number, for example, BII-7533/FR, when requesting quotation.
2. Bottom: Add /BT to the listed part number, for example, BII-7533/BT, when requesting quotation.
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 & Tuning: BII-6000, Available; Order Separately.
Mounting: 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. Flange Mounting: (FGM), Exclusive to BII-7536.
8. Thru-hole Mounting + Free Hanging (THFH)
Transducer and Hydrophone Mounting for more detailed information on mounting/installation.
Cable: Shielded Cable (SC)
Connector: 1. 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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