Directional Hydrophone

BII7070 Series Directional Hydrophone (Acoustic Sensor) and Planar Array Element

BII's directional hydrophones have conical beams for uses in detection of weak signals, broadband signals, pipeline leaks, and tracking of sound sources underwater. Low noise hydrophone (below sea-state zero) is available for noise measurement. These acoustic sensors are also designed for applications in air to detect acoustic emission and stress waves. (Note: couplant such as water or gel is a necessary material to provide efficient acoustic coupling between hydrophone face and the piece under test in air applications.)
Below the critical frequency fc, the hydrophones are of single beam without side lobes. This feature makes the hydrophone be an ideal candidate for target angle estimation systems or sound source tracking systems. With built-in preamplifiers, the hydrophones have higher sensitivity and can transmit signal over long cable.

  

Typical Applications
Direction-finding Sonar, Tracking of Acoustic Tags LBL/SBL/USBL Positioning System Locating Marker/Pinger/Beacon/Transponder Acoustic Pipeline Leak Detection	Array Elements for Array Focusing and Beam Steering Noise Measurement, Bioacoustic Research of Marine Animals Structural Health Monitoring, Acoustic Emission Detection/AE Sensor Monitoring Aquarium/Pool Safety/Alarm System

Related Products
BII7120 Low Noise Low Power Hydrophone	Underwater Transducer: SONAR, NDT, and HIFU
BII7180 Miniature Probe Hydrophone	BII7230 AE Sensor: Wideband Detection

Specification

Directional Hydrophone and Planar Array Element

Usable Frequency	Sensitivity, dBV/µPa	Beam Pattern	Features	No Preamp	With Preamp
Up to 300kHz	-184.0 + Preamp Gain	Conical	300m Depth, 60° to 120°C or 248°F	Datasheet	Datasheet
Up to 450kHz	-188.0 + Preamp Gain	Conical	300m Depth, 60° to 120°C or 248°F	Datasheet	Datasheet
Up to 100kHz	-184.0 + Preamp Gain	Conical	300m Depth, Self-noise is below sea-state zero. 27 dB μPa/√Hz at 1kHz	N/A	Datasheet

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