Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Low Frequency Broadband Transducer

Low Frequency Broadband TransducerLow Frequency Broadband TransducerFree Flooded Ring TransducerFree Flooded Ring TransducerFree Flooded Ring Transducers

BII-7590s are low frequency broadband transducers (Free Flooded Ring Transducers) with toroidal beam and ranging from 1 to 40 kHz for uses in deep/shallow water communication and as low frequency broadband sound sources.

BII-7590 Low Frequency Broadband Transducer

Suggested Application  
Deep Water Submergence
Broadband Communication Transducer
Artificial Acoustic Target
Echo-Repeater Target, Active-Acoustic Target
Underwater Broadband Sound Source
Low Q Sound Source
Voice Communication Underwater
Underwater Telephone
Bioacoustic Stimuli
Marine Animal Behavior Study
Playback Marine Animal Voices/Calls
Long Range Sound Transmission

Features Related Products
Free Flooded Structure for Deep Water
Usable Frequency Range: 1 to 40 kHz
Low Qm, Broadband
High Power
Transmitting & Receiving
BII-5000 Power Amplifier
BII-6000 Impedance Matching and Tuning Unit
BII-8030 Underwater Acoustic Transmitter
BII-8080 Transmitting and Receiving System
Sonar Signal Generation


BII-7590 Series BII-7591 BII-7592 BII-7593 BII-7594
Maximum Operating Depth: 950m 950m 950m 950m
BII-7590 Series BII-7591DW BII-7592DW BII-7593DW BII-7594DW
Maximum Operating Depth: 1500m 1500m 1500m 1500m
-3dB Bandwidth: 18 to 42 kHz 13 to 26 kHz 6.5 to 18 kHz 4 to 11 kHz
Transmitting Voltage Response:
(dB re µPa/V @ 1m)
133.0 131.0 128.5 to 133.2 125.2 to 130.2
Receiving Sensitivity:
(dB re V/µPa)
-196.0 -197.0 -195.8 -189.0
Capacitance: 16.8 nF 21.6 nF 65.2 nF 116.0 nF
Horizontal Beam Pattern: Omni @ 40kHz Omni @ 30kHz Omni @ 20kHz Omni @ 8kHz
Vertical Beam Pattern: 75° Toroidal 80° Toroidal 85° Toroidal 108° Toroidal
Maximum Drive Voltage (Vrms): 300 300 300 300
Size (ΦDxH): 48x21 mm 60x26 mm 89x48 mm 114x86 mm
Weight in Air: 105 gram 280 gram 387 gram 560 gram
Impedance Matching & Tuning: Custom BII-6000: 4 to 16Ω, 50Ω, 60Ω, 100Ω,... Order separately.
BII does not integrate BII-6000 into the transducer housing.
Transmit & Receive Switch:  BII-2100 Transmitting & Receiving Switch; Not included, order separately
BII does not integrate BII-6000 into the transducer housing.
Mounting: Free Hanging (FH)
Cable Length: Default: 6m
Cable: 1. Default: Two Wires (WR)
2. Shielded Cable (SC)
Connector: 1. Default: Wire Leads (WL)
2. Underwater Mateable Connector (UMC)
3. MIL-5015 Style (5015)
4. Custom Connector (custom)
Operating Temperature: -10°C to +60°C
Storage Temperature: -40°C to +60°C
How to Order: Click How to Order.
Transducer Wiring: Click Transducer Wiring for detailed wiring information.
Technical Document: Click BII-7590 TVR and OCV for more information.
Transmitting Array: Array & Aperture Design
Handling: Do not use the cable to support transducer weight in air.
Do not bend the cable splice.

Transmitting Voltage Response and Receiving Voltage Response

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