Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Vibration Insensitive Hydrophone

Vibration Insensitive HydrophoneVibration Insensitive HydrophoneVibration Insensitive HydrophoneVibration Insensitive HydrophoneVibration Insensitive Hydrophone

BII-7090 Vibration Insensitive Hydrophone

When suspended from a ship or boat, buoy, or used in towed array, the hydrophone experiences a large movement and induced vibration resulting from surface waves, currents, hydrodynamic flow turbulence, cable movement, etc... BII-7090 hydrophones have very low acceleration sensitivity for uses in these harsh fields and eliminate spurious signals caused by induced vibration.

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

Suggested Application  
Underwater Vehicles: AUV/UUVs and ROVs Underwater Equipment / Instruments
Tracking of Acoustic Tags in Marine Fisheries and Animals Towed Array Element, Vertical Array Element
Dipping Hydrophone, Sonobuoy Underwater Sound Recording
Marine Bioacoustic Research Passive Acoustic Monitoring (PAM System)
Very low acceleration sensitivity Driving long cable
Frequency range: 0.1 Hz to 300 kHz Very low interference to acoustic field under test
Preamplifier with built-in high-pass filter Small and compact size for detection of broadband acoustic signals
Related Products  
BII-7000 Omnidirectional Hydrophone BII-1000 Hydrophone Preamplifier driving cable up to 1000 m


BII-7090 Series Hydrophone without Preamplifier
Signal Loss over Extension Cable (dB) = 20*log[Ch/(Ch+Cc)]; Ch: Hydrophone Capacitance; Cc: Capacitance of Extension Cable. Cable is of 100pF/meter roughly. Valid for hydrophone without preamplifier.
Hydrophone OCV
BII-7091 -198.0 0.1Hz to 40kHz 97.0 Omnix210°@40kHz SE 27x52 37g
BII-7092 -194.6 0.1Hz to 40kHz 27.0 Omnix210°@40kHz SE 27x52 36g
BII-7092DF -190.5 0.1Hz to 40kHz 5.2 Omnix210°@40kHz DF 27x52 36g
BII-7093 OCV 0.1Hz to 100kHz 22.4 Omnix220°@70kHz SE 21.3x42 17g
BII-7093DF -195.2 0.1Hz to 100kHz 5.6 Omnix220°@70kHz DF 21.3x42 17g
BII-7094 OCV 0.1Hz to 140kHz 13.2 Omnix230°@100kHz SE 15.6x42 15g
BII-7094DF -195.3 0.1Hz to 140kHz 3.4 Omnix230°@100kHz DF 15.6x42 15g
BII-7095 -199.8 0.1Hz to 250kHz 5.0 Omnix200°@150kHz SE 10x36 10g
Sensitivity Matching:
(dB V/µPa)
1. ±1.0 (Default)
2. ±0.3
Output Type: Single Ended Output (SE); Differential Output (DF).
Electrical Insulation: >500MΩ @1kVDC
Cable Length: 1. 6m (default)
2. Custom:≤100m
Cable Options: 1. Default: Coax (ΦD=2.8mm) (Coax)
2. Shielded cable with two conductors (ΦD=3.6mm) (SC36)
3. Shielded cable with two conductors (ΦD=6.5mm) (SC65)
BII-7090 Series Hydrophone with Preamplifier
Note: Hydrophone Size with two ΦDxL: first ΦDxL is the size of sensing element, second ΦDxL is the size of preamplifier housing.
Hydrophone OCV
Noise Density
BII-7096 -194.6+Preamplifier Gain 1Hz to 40kHz 36 Omnix210°@40kHz 27x61 110
BII-7097 OCV 1Hz to 100kHz 40 Omnix220°@70kHz 21.3x61 108
BII-7098 OCV 1Hz to 140kHz 42 Omnix230°@100kHz 9x20
BII-7099 -199.8+Preamplifier Gain 3Hz to 250kHz 50 Omnix200°@150kHz 9x20
Preamplifier Gain: Options: 0/26/40/60dB, preamplifier dependent. Specify when ordering.
Built-in Preamplifier: BII-1000 Series Hydrophone Preamplifier.
1. Default: BII-1060 series preamplifier. 2. Customized: Specify when ordering.
Filter: Customized high pass filter. Specify -3dB cut-off frequency when ordering.
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.
Maximum Output: 10.9Vpp with +12VDC Power Supply
Suggested DC Supply: +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.
Supply Voltage: +4.5 to +24VDC, preamplifier dependent.
Current (Quiescent): Preamplifier dependent. Refer to BII-1000 Series Hydrophone Preamplifier.
Cable Length: 1. Default: 10m
2. Custom: up to 1000m
Cable: 1. Shielded Cable (ΦD=6.5mm) (SC)
2. Wire/Cable Bundle (WCB): for use with Thru-hole Mounting ONLY.
Miscellaneous: BII-7090 Series Hydrophone
Acceleration Sensitivity: < 40 (dB re µPa/(m/s²)
Maximum Depth: 100 m
Mounting: 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 (Plastics): (BFMP)
6. Bolt Fastening Mounting (Stainless Steel): (BFMSS)
7. Thru-hole Mounting + Free Hanging (THFH)
Click Transducer and Hydrophone Mounting for more detailed information on mounting/installation
Cable Length: 1. Default: 10m
2. Custom: up to 300 m
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)
Operating Temperature: -10°C to +60°C
Storage Temperature: -40°C to +60°C
How to Order: Click How to Order.
Hydrophone Wiring: Click Hydrophone Wiring for detailed wiring information.
Receiving Array: Array & Aperture Design

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