Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Underwater Acoustic Transceiver/Artificial Acoustic Target

BII-7640 Underwater Acoustic Transceiver/Artificial Acoustic Target


Acoustic Transceiver BII-7646 BII-7647 BII-7648 BII-7649
Operating Depth: 300m 300m 300m 500m
Size (ΦDxH): Φ110 x 100mm Φ90 x 100mm Φ60 x 100mm Φ48 x 100mm
Transmitting Elements:
Resonant Frequency: 8 kHz 15 kHz 30 kHz 40 kHz
Usable Frequency: 5 to 12 kHz 10 to 25 kHz 20 to 40 kHz 30 to 55 kHz
Transmitting Face: Cylinder Cylinder Cylinder Cylinder
Transmitting Beams:
(Horizontal x Vertical)
±2dB@8 kHz
±2dB@15 kHz
±2dB@30 kHz
±2dB@40 kHz
Radiation Impedance@fr: 260 Ω 272 Ω 341 Ω 190 Ω
Maximum Drive Voltage: 300Vrms  300Vrms   300Vrms   300Vrms 
Impedance Matching: Custom BII-6000: 4 to 16Ω, 50Ω, 60Ω, 100Ω...; Not included, order separately, Append IM to part number.
Note: BII-6000s working with BII-7644 and BII-7641 are standalone units ONLY.
BII-6000s working with BII-7642 and BII-7643 can be standalone units or embedded units inside transducer housing. specify when ordering.
Receiving Elements:  
Sensitivity (dBV/µPa): Refer to the respective TVROCV links above.
Frequency Range: 1Hz to 400kHz
Preamplifier Gain: Programmable: 0/20/40/60dB
Gain Selection Voltage: CMOS/TTL Compatible
Logic Low 0: Gain Selection Wire to COM or 0 to +0.8VDC;
Logic High 1: Gain Selection Wire Open or +2.4 to Vcc.
Note: Digital output, switch, relay, optocoupler etc. can be used for gain selection and the voltage protection rating of these devices must be greater than power supply voltage level.
Gain Selection Table: Digital A1       Digital A0      Gain (dB)
     0                   0               0
     0                   1               20
     1                   0               40
     1                   1               60
Customized Filter: Band Pass, Specify -3dB cut-off frequency when ordering.
Receiving Directivity: Horizontal x Vertical: Omni x 200° @ 250kHz
Input Noise Density: 44 dBµPa/√Hz @ 1kHz
Maximum Output: Supply Voltage - 3 Vpp
Supply Voltage: +8.2 to +30VDC
Current (Quiescent): 10 mA
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.
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)
Transducer and Hydrophone Mounting for more detailed information on mounting/installation.
Cable: 1. Wire/Cable Bundle (WCB): ONLY for Thru-hole Mounting.
2. Shielded Cable (SC) for Free Hanging, Bolt Fastening and End-face Mounting.
Connector: 1. Default: Wire Leads (WL)
2. Underwater Mateable Connector (UMC)
3. MIL-5015 Style (5015)
4. Custom (Custom):   
    BNC male (BNC), 3.5 mm (⅛″) TRS Plug (3.5TRS), ¼″ (6.35 mm) TRS Plug (6.35TRS)
    XLR Plug (Unbalanced wiring) (XLR)
Operation Temperature: -10 to +60°C
Storage Temperature: -40 to +60°C
How to Order  BII-7640 Series Transducers
BII-764X xx xx -xx -xx /xx -xx -xx -xx -xx -xx
Transducer Blank
in kHz
Matching Impedance
in Ω
or BII Power Amplifier
Receiving Gain
in dB
High Pass Filter
in kHz
Mounting Cable Length
in meter
Cable Connector
Example of Part Number: Description
BII-7648/40-THSO-0.1-WCB-WL BII-7648 transducer, 40dB Preamplifier Gain, Thru-hole Mounting (Single O-ring), 0.1m Shielded Cable & Wires, Wire Leads.
BII-7648IM-30-50/40-5.0-FH-20-SC-WL BII-7648 transducer, Built-in Impedance Matching at 30kHz, 50Ω, 40dB Preamplifier Gain, 5kHz high Pass Filter, Free Hanging, 20m Shielded Cable, Wire Leads
BII-7648IM-30-BII-5061/40-5.0-FH-20-SC-WL BII-7648 transducer, Built-in Impedance Matching at 30kHz to BII-5061 Power Amplifier, 40dB Preamplifier Gain, 5kHz high Pass Filter, Free Hanging, 20m Shielded Cable, Wire Leads

Electrical Wiring

Signal Cable with Wire Leads Underwater Connector
Transmitting + Brown pin 5
Transmitting - Blue pin 6
Power Supply: +VDC Red Pin 3
Power Supply Common, Digital Common System Grounding Black Pin 1
Receiving Signal White Pin 2
Receiving Common Green Pin 4
A1 Yellow Pin 7
A0 Orange Pin 8
N/A N/A Pin 9 (No Connection)
System Grounding Shield Pin 10
Note: Power Supply Common and cable shield must be grounded firmly for safety.

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