Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Bandpass Hydrophone

BII-7200 Bandpass Hydrophone (6kHz to 2MHz)

BII-7200 hydrophones are band pass receivers which feature broadband and customization on beamwidth and operating frequency, and offer flexible, custom-made and low cost solutions to special transducer demanding in underwater acoustics. This makes BII-7200s be the best for use in noise rejection and communication where complex waveforms (or known narrowband signals) with higher harmonics must be transformed with low distortion.

Impedance of BII-7200s is resistance at resonant frequency, which makes possible the impedance matching between BII-7200 and the signal conditioning circuit. With impedance matching, the energy being reflected from the hydrophone/receiver face is minimized. The minimum of reflected energy is useful and critical in certain ultrasonic applications.

Optional mounting parts are available for installation on portable-mounting apparatus, submersibles, pipe, tank or vessel.

Suggested Application  
Tracking and Location of Sound Sources Underwater
Pinger/Locator/Transponder/Beacon/Acoustic Release/Acoustic Tags
LBL/SBL/USBL/Acoustic Positioning/Tracking
Marine Animal Voices/Calls/Whistles/Songs/Clicks
Analog and Digital Communication Underwater
Sound Velocity Profiler, Doppler Receiver
Detection of Known Narrowband Signals
Ultrasonic Instrumentation
Frequency Available: 6kHz to 2MHz
Bandpass, Low Q/Broadband
Conical, Omnidirectional, Hemispherical and Fan-shaped Beam
Easy & Simple Installation
Resistive Impedance at Resonant Frequency
Customized on Beamwidth & Operating Frequency
Related Products  
BII-1000 Hydrophone Preamplifier BII-8000 Recording, Analysis & Playback


Bandpass Hydrophone: BII-7201 BII-7206
Resonant Frequency fr: Available from 6kHz to 2MHz, Customized. Available from 6kHz to 2MHz, Customized.
Built-in Preamplifier: No Yes, Customized, specify preamplifier when ordering.
Receiving Sensitivity: -170 to -205; dBV/µPa -170 to -205 + Preamplifier Gain; dBV/µPa
Output Impedance at fr: Included in test report
0.1Ω to 50 Ω, preamplifier dependent.
Current (Quiescent): N/A 0.6/1.0/3mA, Preamplifier dependent.
Supply Voltage: N/A +4.5 to +30VDC, or +6 to +30VDC, Preamplifier dependent.
Cable: 1. Default: Shielded cable (ΦD=3.6mm) (SC36)
2. Shielded cable (ΦD=6.5mm) (SC65)
3. Coax (ΦD=2.8mm) (Coax)
4. 50Ω RG58 Coax (RG58)

5. Wire/Cable Bundle (WCB):
    for use with Thru-hole Mounting ONLY.
1. Shielded cable (ΦD=6.5mm) (SC65)
2. Wire/Cable Bundle (WCB):
    for use with Thru-hole Mounting ONLY.
Miscellaneous: BII-7200 Series Bandpass Hydrophone
Quality Factor Q: 2 typically. Note: -3dB bandwidth = fr/Q
Beam Pattern: Conical, Omnidirectional (Spherical), Hemispherical and Fan-shaped (Along-track & Cross-track).
-3dB Beam Width: Customized.
Side Lobe Level: ≤ -17.7 dB for Conical Beam ONLY.
Depth Rating: 1. Default: 100 m (Blank)
2. Deep Water: 500m to 950m (DW)
Note: 500m to 950m depth rating is not available to some parameter combinations. BII shall contact you if depth rating you specified is not supported by your specified transducer.
Output Type: 1. Default: Single Ended Output (SE), Append SE to the listed part number.
2. Differential Output (DF), Append DF to the listed part number. Exclusive to preamplified hydrophones.
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. Thru-hole Mounting + Free Hanging (THMFH)
8. Flange Mounting: (FGM)
Transducer and Hydrophone Mounting for more detailed information on mounting/installation.
Connector: 1. Default: Wire Leads (WL)
2. BNC Male (BNC)
3. 3.5 mm (⅛″) TRS Plug (TRS35)
4. ¼″ (6.35 mm) TRS Plug (TRS635)
5. XLR Plug (XLR)
6. Underwater Mateable Connector (UMC)
7. MIL-5015 Style (5015)
8. +9VDC Battery Snap (BS) (Exclusive to preamplified hydrophone)

9. Custom (custom)
Housing Diameter: ΦD ≤ 168 mm
Suggested DC Supply:
(for BII-7206 ONLY)
+9VDC Battery, Marine Battery, Automobile Battery, Fixed DC Linear Power Supply, Not Included.
DO NOT use variable power supply whose maximum supply voltage is higher than the rated voltage.
DO NOT use switching mode DC power supply.
Weight in Air: N/A
Operating Temperature: -10°C to +60°C
Storage Temperature: -40°C to +60°C
Hydrophone Wiring: Click Hydrophone Wiring for detailed wiring information.
Receiving Array: Array & Aperture Design
How to Order BII-7200 Series Bandpass Hydrophone
BII-720X xx /xx /xx or /xxXxx -xx -xx -xx -xx -xx -xx
fr Frequency
in kHz
-3dB Beamwidth
in Degree
Preamplifier Gain
in dB
Mounting Cable Length
in meter
Cable Connector
Example of Part Number: Description
BII-7201/30/20-THSO-0.1-SC-WL BII-7201 transducer, 30kHz, 20° Conical Beamwidth, Thru-hole Mounting (Single O-ring), 0.1m Shielded Cable, Wire leads.
BII-7201DW/200/3-THSO-0.1-SC-WL BII-7201 transducer, 500m depth rating, 200kHz, 3° Conical Beamwidth, Thru-hole Mounting (Single O-ring), 0.1m Shielded Cable, Wire leads.
BII-7201DW/200/3X120-THSO-0.1-SC-WL BII-7201 transducer, 500m depth rating, 200kHz, 3°x120° Fan-shaped Beamwidth, Thru-hole Mounting (Single O-ring), 0.1m Shielded Cable, Wire leads.
BII-7206/30/20-40-DF-THSO-0.1-SC-WL BII-7206 transducer, 30kHz, 20° Conical Beamwidth, 40dB preamplifier, Differential Output, Thru-hole Mounting (Single O-ring), 0.1m Shielded Cable, Wire leads.
BII-7206/37.5/SPH-40-DF-FH-10-SC-BNC/BS BII-7206 transducer, 37.5kHz, Spherical Beam, 40dB preamplifier, Differential Output, Free Hanging, 10m Shielded Cable, BNC and  +9V Battery Snap.

Normalized Voltage Sensitivity

Bandpass HydrophoneBandpass Hydrophone 

Bandpass HydrophoneBandpass Hydrophone

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