Miniature Probe Hydrophone & AE Sensor
BII-7180 Series Miniature
Probe Hydrophone and AE Sensor
Underwater Sounds:
BII-7180 series are miniature hydrophones with small aperture size and usable
up to 3 MHz. Conical and omnidirectional directivity patterns are
available. Multiple miniature probe hydrophones can be configured as a vector
hydrophone (vector sensor) or array for uses in extraction of
directional information (source location), measurement of particle velocity, particle
acceleration and pressure gradient.
The probe hydrophones are practical and handy tools for research
and application of Helmholtz Integral Equation in underwater
acoustics and for the measurement of pressure or intensity
distribution of near-field and far-field radiated from vibrational
and acoustical sound sources underwater.
NDT in Solids: receiving audible and
ultrasonic sounds, acoustic emission (AE),
structural health monitoring (SHM), metallurgical properties of
metals, etc... The couplant such as water or gel is a
must-have material to provide efficient acoustic coupling between
the receiving face of the hydrophone and the piece under test (the
subject). The hydrophones can be glued on or
inside subject permanently with adhesives such as epoxy.
NDT in Fluids: uses in waterlike and airlike fluids
for the analysis of their macroscopic and microscopic, physical and
chemical properties.
BII-7180 series MUST not be used with
flammable and/or explosive materials, and not used in Solvents such
as hydrochloric acid, isopropyl alcohol, ethyl lactate, acetone,
xylene, Iso hexanes, mineral spirits, etc...
Technical Notes:
Particle Velocity in x direction ux
= - 1/(jωρ)*(аp/аx);
ρ: Density; аp/аx:
Pressure Gradient in the x direction.
Dipole Vector Hydrophone: Voltage Response V=M*(d/λ)*cosθ; M:
Amplitude Constant related to element sensitivity; d: spacing
distance between two elements; θ: Arriving angle from the axis of
the two elements.
| Typical
Applications |
|
| Study of Acoustic Radiation Field |
General Purpose Hydrophone, Reference Hydrophone |
| Ultrasonic Testing and Analysis |
Acoustic
Emission (AE), Structural Health Monitoring (SHM),
Thermoacoustic Tomography |
| Helmholtz Integral in Acoustics |
Near-field Calibration and Measurement |
| Elements of Vector Hydrophones/Array |
High Sound Level Measurement (Warning: Cavitation will damage hydrophone) |
| Research in Boundary Element Acoustics |
Trouble-shooting, Maintenance and Development of
Transducers and Array |
| |
| Specification |
| Miniature Probe Hydrophone and AE
sensor |
| Hydrophone |
Sensitivity,
dB V/μPa |
Frequency
Range |
Directivity
Pattern |
Aperture Size |
No Preamp |
Built-in
Preamp |
| BII7181 |
-224 or
-221+Preamp Gain |
1Hz to 1.3MHz |
Omnidirectional and Toroidal |
N/A |
Datasheet |
Datasheet |
| BII7182 |
-230 or
-225+Preamp Gain |
1Hz to 1.6MHz |
Omnidirectional and Toroidal |
N/A |
Datasheet |
Datasheet |
|
BII7183 |
-230 or
-224+Preamp Gain |
200Hz to 1.2MHz |
Conical |
Φ3.5 mm |
Datasheet |
Datasheet |
|
BII7184 |
-217+Preamp Gain |
200Hz to 3MHz |
Conical |
Φ2.0 mm |
Datasheet |
Datasheet |
|
BII7185 |
-227+Preamp Gain |
200Hz to 2MHz |
Conical |
Φ1.0 mm |
N/A |
Datasheet |
| BII7188 |
-205+Preamp Gain |
200Hz to 0.7MHz |
Conical |
Φ3.5 mm |
N/A |
Datasheet |
| BII7189 |
-210+Preamp Gain |
200Hz to 0.7MHz |
Conical |
Φ1.8 mm |
N/A |
Datasheet |
| Note: Service temperature up to +120°C (or 248°F) is
available with BII-7183. |
| These products are tested and calibrated in water. It
is buyer's responsibility and liability to calibrate and
maintain the AE sensors according to the acoustic emission
national standards of buyer's country. |
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