Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Low Cost Hydrophone Array / Streamer Element

BII-7140 Series Low Cost Hydrophone Array / Streamer Element

Hydrophone Array / Streamer ElementHydrophone Array / Streamer ElementHydrophone Array ElementStreamer ElemenHydrophone Array / Streamer ElementHydrophone Array Element

Depending on the operating frequency, BII-7140 series hydrophones can be treated as Points, Lines or Rectangle Aperture Elements in array signal processing. Shielded cables and coaxial cables provide great noise rejection over long cable.

Technical Notes:
Signal Loss Over Extension Cable (dB) = 20*log[Ch/(Ch+Cc)];   Ch - Hydrophone Capacitance; Cc - Extension Cable Capacitance
Array directivity function = (directivity function of array element) * (directivity function of array pattern).

Suggested Application  
Dipole, Line, Planar, Cylindrical, Conformal Arrays Low Power Acoustic Projector
Point, Line or Rectangle Aperture element in array Broadside Array and End-Fire Array
Towed Arrays, Vertical Receiving Array Hydrophone Array and Passive SONAR
Tracking of Acoustic Tags in Marine Fisheries and Animals Natural, Anthropogenic and Bioacoustic Underwater Sounds
Hydrophone Array in Multibeam Sonar System Passive Acoustic Monitoring System (PAM System)
Detection of Explosive Sound Sources and Air Guns Oil-filled Streamer Element
Vector Hydrophone Element Sonobuoy, Seismic Exploration/Borehole Seismic
Features  
Frequency Range: 0.1 Hz to 220 kHz Sensitivity Matching for Receiving Array
Drive 100m cable Shielded Electrically, Single Ended or Differential Output
Operating Depth: up to 950m Very Low Interference to Acoustic Field Under Test
Low cost, High Quality Acoustic Performances Small Size for Detection of Broadband Acoustic Signals
Related Products  
BII-8040 Receiver with Filtering-SUM Beamformer and Array Shading  

Specification

Array Element BII-7141 BII-7142 BII-7143 BII-7144 BII-7145
Operating Depth:  300m 950m 300m 300m 300m
Output Type: Single Ended Single Ended Single Ended Differential Single Ended
Capacitance:  11.6 nF 5.6 nF 6.2 nF 6.0 nF 5.1 nF
Voltage Sensitivity:
(dB re V/µPa)
-203.5 -202.0 -201.5 -198.2 -206.7
Acceleration Sensitivity:
dB re µPa/(m/s²)
108.0 108.0 108.0 108.0 111.0
Sensitivity Matching:
(dB V/µPa)
1. ±1.0 (Default)
2. ±0.3
3. ±0.1
1. ±1.0 (Default)
2. ±0.3
3. ±0.1
1. ±1.0 (Default)
2. ±0.3
3. ±0.1
1. ±1.0 (Default)
2. ±0.3
3. ±0.1
1. ±1.0 (Default)
2. ±0.3
3. ±0.1
Usable Frequency:
(±2 dB re V/µPa )
0.1 Hz to 160 kHz 0.1 Hz to 160 kHz 0.1 Hz to 160 kHz 0.1 Hz to 160 kHz 0.1 Hz to 220 kHz
Horizontal Directivity: Omnidirectional
±2dB@80 kHz
Omnidirectional
±2dB@80 kHz
Omnidirectional
±2dB@80 kHz
Omnidirectional
±2dB@80 kHz
Omnidirectional
±2dB@150 kHz
Vertical Directivity: 200° ±3dB@80 kHz 200° ±3dB@80 kHz 200° ±3dB@80 kHz 200° ±3dB@80 kHz 210° ±3dB@150 kHz
Electrical Insulation:  > 500MΩ@1kVDC   > 500MΩ@1kVDC   > 500MΩ@1kVDC   > 500MΩ@1kVDC   > 500MΩ@1kVDC  
Size/Aperture:  ΦDxLength
14.0x25.0 mm
ΦDxLength
14.0x25.0 mm
ΦDxLength
14.0x25.0 mm
ΦDxLength
14.0x35.0 mm
ΦDxLength
10.0x17.0 mm
Weight (in air):  6 grams 6 grams 6 grams 10 grams 4 grams
Cable Length: 1. 0.15m (default)
2. Custom:
    up to 100m
1. 0.15m (default)
2. Custom:
    up to 50m
1. 0.15m (default)
2. Custom:
    up to 50m
1. 0.15m (default)
2. Custom:
    up to 100m
1. 0.15m (default)
2. Custom:
    up to 50m
Add-on Receiver: BII-8040 Underwater Acoustic Receiver. Not included, order separately
Cable/Wiring: 1. Default: Coaxial Cable (ΦD=2.8mm) (Coax)
2. Shielded Two Conductor Cable (ΦD=3.6mm) (SC36)
3. Shielded Two Conductor Cable (ΦD=6.5mm) (SC65)
4. Solder Pins on One End of the Hydrophone (SP)
5. Solder Pins on Both Ends of the Hydrophone (SPB)
Electrical Leads: 1. Default: Wire Leads (WL)
2. Solder Pins (SP)
3. Custom Connector (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.
Technical Document: Click Sensitivity & Beam Pattern for more information.
Receiving Array: Array & Aperture Design

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