Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Doppler Transducer

Doppler TransducerDoppler TransducerDoppler TransducerDoppler TransducerDoppler TransducerDoppler Transducer

BII-7610 Doppler Transducer

Benthowave's Doppler transducers are optimally designed for use in Doppler SONARS (Doppler Effect) which determine velocity of ships and moving objects, measure motion of ocean surface, internal waves or current.

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.

Note: Transducer bandwidth = resonance frequency (or operating frequency)/quality factor.

Technical notes
The cable has adverse effects on the transducer performances in high frequency range such as 600kHz and 1.2MHz. 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 need long cable for your project, you may have an impedance matching unit built inside the high frequency transducer of 600kHz and 1.2MHz 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 Features Related Products

Doppler Sonar, Speed Determination and Log
Acoustic Doppler Profiler (ADCP), Velocimeter
Ship Speed/Ocean Current/Flow Measurement
Security, Detection of Moving Object
Support Janus Configuration
Acoustic Correlation Sonar for Speed Measurement

Beamwidth: 1.0º to 4.4º
Broadband, Low Sidelobs
Detection Range: up to 900m
38kHz to 1.2MHz
Easy Mounting

BII-2100 Transmitting & Receiving Switch
BII-1000 Preamplifier
BII-5000 Wide Power Bandwidth
BII-6000 Impedance Matching and Tuning Unit
BII-8080 Transmitting & Receiving System


Doppler Transducer  BII-7611 BII-7612 BII-7613 BII-7614 BII-7615 BII-7616
Operating Frequency: 38 kHz 70 kHz 150 kHz 300 kHz 600 kHz 1.2 MHz
Echo Range: 900m 600m 400m 200m 80m 15m
TVR@fr (dB µPa/V@1m): 160.5 169.0 182 186 190.5 190.7
Receiving Sensitivity: -177.0 -180.0 -190.6 -195 -201 -207.0 
Quality Factor Qm: 3 3 3 3 3 3
Beam Pattern: Conical Conical Conical Conical Conical Conical
One-Way Beamwidth(-3dB): 15.2º 8.2º 3.7º 2.2º 1.4º 1.4º
Two-Way Beamwidth(-3dB): 11.0º 6.0º 2.6º 1.6º 1.0º 1.0º
One-Way Sidelobe(dB): ≤-17.7 ≤-17.7 ≤-17.7 ≤-17.7 ≤-17.7 ≤-17.7
Two-Way Sidelobe(dB): ≤-35.4 ≤-35.4 ≤-35.4 ≤-35.4 ≤-35.4 ≤-35.4
Size (ΦDxH): 168x60mm 168x40mm 168x26mm 141x26mm 114x25mm 60x26mm
Special Note: Deeper detection depth and less beamwidth can be achieved with planar array of multiple BII-7611s.
Depth Rating: 100m maximum.
Maximum Drive Voltage: 600Vrms
Matching & Tuning:  Custom BII-6000: 4 to 16Ω, 50Ω, 60Ω, 75Ω, 100Ω,...; Not included, order separately, Append IM to part number.
Transmit & Receive Switch: BII-2100 Transmitting & Receiving Switch; Not included, order separately, Append TR to part number.
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)
7. Flange Mounting: (FGM)
Transducer and Hydrophone Mounting for more detailed information on mounting/installation.
Cable: 1. Default: Shielded Cable (SC)
2. RG58 50 Ω Coax (RG58)
3. Wire/Cable Bundle (WCB): ONLY for Thru-hole Mount with BII-761xTR and BII-761xTRIM.
Connector: 1. Default: Wire Leads (WL)
2. 50Ω BNC Male (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. Coax with BNC is not intended
    for hand-held use at voltages above 30Vac/60Vdc
3. Underwater Mateable Connector (UMC)
3. MIL-5015 Style (5015)
4. Custom (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.

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