Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

High Frequency Underwater Transducer: 0.5 to 3 MHz

High Frequency Underwater TransducerHigh Frequency Underwater TransducerUltrasonic TransducerHigh Frequency Underwater TransducerHigh Frequency Underwater TransducerHigh Frequency Underwater TransducerHigh Frequency Underwater Transducer

BII-7580 High Frequency Underwater Transducer: 0.5 to 3 MHz

Benthowave manufactures high frequency underwater transducers for uses in short echo-ranging systems, utilization of ultrasonic energy and Ultrasonic testing and analysis. These transducers are made of specialized acoustic materials and structure to achieve broadband performance and high resolution. BII-7580 is suitable to be used in laboratory, river, lake and ocean.

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.

Technical notes
The cable has adverse effects on the transducer performances in high frequency range. The longer the cable is, the worse the adverse effects on the transducer performance is. When you place order, please specify the shortest cable length acceptable to your project.
If you use long cable in your project, you may have an impedance matching unit built inside the transducer to match cable impedance such as 50 ohms RG58 coax.

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

Benthowave stocks following cables:  
Cable Nominal Impedance
RG58 Coax 50 Ω
RG174/U Coax 50 Ω
Shielded Cable, Two Conductors 67 Ω
Shielded Cable, Two Conductors 90 Ω
Shielded Cable, Four Conductors 52 Ω
Suggested Application  
Underwater Sound Velocimeter/Sound Velocity Probe
Sound Velocity Profiler
Plankton Sonar: Target Strength/Abundance Estimate
High Frequency Ultrasound Energy Sources
Underwater Robot, Vehicle and Equipment
Image Sonar, Backscatter Surveying
Water Sonication Treatment/Algae Bloom Control
Short Range Navigation, Inspection and Survey
Object Detection and Tracking, Obstacle Avoidance
Precision Underwater Distance Gage, Altimeter, Liquid Level
Ultrasonic Instrumentation
Optical Analysis of Ultrasonic Wave Fields in Sound Velocity Testing
High Frequency
Small Beam Angle
Low Q/Broadband
Easy mounting
Related Products  
BII-2100 Transmitting & Receiving Switch
BII-5000 Power Amplifiers
BII-6000 Impedance Matching and Tuning
BII-8030 Underwater Acoustic Transmitter
BII-8080 Transmitting & Receiving System
Sonar Signal Generation


Through-hole MountingHigh Frequency Underwater TransducerFlush Mounting
Transducer Operating
dB µPa/V@1m
dB V/µPa
Q Beam Angle
One Way
Size, mm
BII-7581 1MHz 174.3 -207.2 3 3.3° 300m 950m 33x50
BII-7582 2MHz 184.6 -216.4 3 1.7° 300m 950m 33x50
BII-7583 600kHz 181.0 -193.0 3 3.8° 300m 950m 48x25
Power Capability: 500W (1% Duty Cycle)
Temperature Sensor: 1. Default: No built-in temperature sensor.
2. Built-in NTC thermistor. When ordering, append TS to part number for integrating NTC thermistor in transducers.
Beam Pattern: Conical
Beam Angle (Two-Way): 0.72*One-way Beam Angle
Sidelobe (One-Way): ≤-17.7 dB
Sidelobe (Two-Way): ≤-35.4 dB
Deep Water: To order Deep Water model, append DW to the part number.
For example, BII-7583DW is of 950m depth rating; BII-7583 is of 300m depth rating.
Impedance Matching: Custom BII-6000: 50 Ω, 67 Ω, 90 Ω, etc..., NOT included, Order Separately, Append IM to part number.
T/R Switch:  BII-2100 Transmitting & Receiving Switch; Not included, order separately,  Append TR to part number.
Mounting Options: 1. Default: Free Hanging (FH)
2. Thru-hole Mounting with Single O-ring (THSO)
3. Thru-hole Mounting with Double O-ring (THDO)
4. Bolt Fastening Mounting (Stainless Steel): (BFMSS)
5. End-face Mounting:  (EFM)
Transducer and Hydrophone Mounting for more detailed information on mounting/installation.
Cable Length: 1. Default: 0.6m
2. Custom: up to 30m
Cable: 1. Default: 50Ω RG58 Coax (Voltage Rating ≤ 50Vrms) (RG58)
2. Shielded Cable (SC)
3. Wire/Cable Bundle (WCB): ONLY for Thru-hole Mount with BII-768xTR and BII-768xTRIM.
Connector: 1. BNC male (50 ohms) (Voltage Rating ≤ 50Vrms) (BNC)
    Warning: It is buyer's sole responsibility to make sure that the (female) BNC shield of the signal source is firmly
    grounded for operating safety before hooking up transducer to the signal source.
2. Wire Leads (WL)
3. Underwater Mateable Connector (UMC)
Note: Thru-hole Mounting do not support BNC and Underwater Connectors.
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.

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