Low Noise, Low Power, and Low Frequency Hydrophone
BII7120 Series Low Noise, Low Power, and Low Frequency
Hydrophone: Noise
Level below
Sea State Zero
BII's low noise hydrophones are optimized to possess self noise
levels below sea-state zero with omnidirectional response in low
frequency range and toroidal response in high frequency range. Its
streamlined hemispherical dome minimizes drag force and hydrodynamic
noise. The power consumption can be customized to be
600µA quiescent
current at 5VDC for battery powered underwater
instrumentation. A spatial array of multiple hydrophones can be set
up for directional measurement system. BII7128 hydrophones can measure underwater sounds
and pressure fluctuations
down to 0.1Hz
infrasonic sounds: Surface Waves (Wave-height
Sensor), Turbulences, seismic, ocean traffics, industrial noises,
precipitations, biologics, ... With these low power hydrophones,
battery and system lifetimes are extended, and lighter portable
systems with lower-capacity batteries can be achieved. Its compact
small size avoids interferences to acoustic field under test. Preamplifiers integrated in hydrophones can drive cable up to 200m
without signal loss. Available cable terminals include audio
connectors (TRS, XLR, DIN), BNC, and underwater mateable connectors. The
housing and mounting part are corrosion resistant plastics and/or
stainless steels.
|
Typical Applications |
|
Noise Measurement, Marine Bioacoustics.
|
Surface Waves, Ocean Turbulences, Marine
Hydrodynamics, Marine Geophysics.
|
| Passive Acoustic Monitoring (PAM System). |
Battery-Powered Instruments: Sonobuoy, Recorder,
Transponder, Acoustic Release... |
| Wave-height Sensor, Wave/Tide
Recorder/Logger. |
Coastal/Offshore Processes, Engineering
& Management, Wave-Structure Interaction. |
| Related Products |
|
|
BII7010
Low Noise Broadband Hydrophone |
BII7070
Low Noise Directional Hydrophone |
| Low Noise, Low Power, and Low
Frequency Hydrophones. |
| Hydrophone |
Noise Density
@ 10kHz |
Frequency
Range |
Directional
Response Pattern |
Maximum Depth |
Document |
|
BII7121 Series |
20 dB μPa/√Hz |
0.2Hz to 50kHz |
Omnidirectional to
Toroidal |
300 m |
Datasheet |
|
BII7122 Series |
20 dB μPa/√Hz |
0.6Hz to
70kHz |
Omnidirectional to
Toroidal |
300 m |
Datasheet |
| BII7125 Series |
29 dB μPa/√Hz |
3.0Hz to 180kHz |
Omnidirectional to Toroidal |
300 m |
Datasheet |
| BII7126 Series |
33 dB μPa/√Hz |
3.5Hz to 260kHz |
Omnidirectional to Toroidal |
300 m |
Datasheet |
| BII7128 Series |
30 dB μPa/√Hz |
0.02Hz to 40kHz |
Omnidirectional to Toroidal |
300 m |
Datasheet |
| BII7079 Series |
20 dB
μPa/√Hz |
3.0Hz to 100kHz |
Conical |
300 m |
Datasheet |
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