BC 311 Hydrophone

BC 311

Hydrophone BC 311 is a robust spherical compact hydrophone for absolute measurements of the sound spreading in actuating medium. The hydrophone has first-class characteristics in all geometry directions. It has omnidirectional characteristics in angular range, 270° wide in the x-z plane, and 360° in the x-y plane.

The hydrophone BC 311 can operate as a sound projector as well as be used to measure sound spreading in liquid, and in the course of reciprocity calibration. The fact is that the hydrophone piezoelectric sensing element has a reversibility effect. Mechanical stimulation leads to forming of an electric signal and vice-versa —alternative current voltage applied to sensing element leads to stimulation of mechanical oscillations. The figure shows the hydrophone BC 311 frequency curves. The presented data refers to 1-meter radiation distance. The curve inclination is typical for hydrophones with piezoelectric sensing elements.

Specifications

Labelling BC 311
Version underwater threaded
Nominal voltage sensitivity 65 µV/Pa 39 µV/Pa
Nominal charge sensitivity 0.44 pC/Pa 0.3 pC/Pa
Sensitivity level (relative to 1V/µPa) -204 dB
Frequency band 3 to 100,000 Hz
Maximum value of measured sound pressure range 100 kPa
Maximum value of measured attenuating sound pressure range up to 10 MPa
Limit static line pressure 60 MPa
Capacity exclusive of cable minimum 6 nF
Explosion-proof version — upon request
Casing material stainless steel
Dimensions(length × casing diameter) 173 × ⌀23 mm 171 × ⌀23 mm
Coupling thread — M20×1.5
Cable standard length 10 m 2 m
Maximum cable length 250 m
Cable type Coaxial, with PVC coating, central wire, shielded, resistant to the environment with sulfuric acid
Cable connection BNC
Measurements operation medium water, air, oil and oil products, natural gas
Operation medium temperature 0 to +60 °C
Environment air temperature −60 to +80 °C

Measurement

  • sound spreading in water
  • ultrasonic in a liquid medium
  • noise in wet and polluted media
  • sound in liquid and gas medium (laboratory and factory).

Applications

  • as calibration standard
  • as sound projector
  • marine mammals sound
  • cavitation processes

BC 311 Hydrophone Gallery

BC 312 Hydrophone

BC 312

Hydrophones BC 312 are dynamic pressure transducers with even response curve throughout the whole range of frequencies observed in any homogeneous medium, including air, sea and fresh water. Used to determine explosion pressure in the range up to 1,000 kPa, pulse duration 2-5 ms (time sensitivity: some 0.1 ms).

They are also are used in hydro-acoustics for reading-through underwater signals and noise, for measuring purposes, and also as components of beamed receiver hydroacoustic antennas.

These can be supplied without an integrated amplifier, in such case, it can be used as a sonar transmitter.

Specifications

Designation BC 312
Version underwater threaded
Nominal sensitivity 200 µV/Pa 150 µV/Pa
Sensitivity level (relative to 1V/µPa) -192 dB -194 dB
Frequency band 20 to 20,000 Hz
Self-noise*, RMS 0.02 Pa
Maximum value of measured sound pressure range 50 kPa
Limit static line pressure 60 mPa
Output direct voltage level 10 to 13 V
Power IEPE (DeltaTron/ ISOTRON)
Supply voltage +(18 to 30) V
Supply current 3 mA
Explosion-proof version — upon request
Casing material stainless steel
Dimensions (length × casing diameter) 173 × ⌀23 mm 171 × ⌀23 mm
Coupling thread — M20×1.5
Cable standard length 10 m 2 m
Maximum cable length 100 m
Cable outer diameter 10.2 mm
Cable type coaxial, PVC coating, central wire, screened, resistive to the environment containing sulfuric acid
Cable plug BNC
Measurements operation environment water, air, oil and oil products, natural gas
Operating environment temperature 0 to +60 °C
Environment air temperature −60 to +80 °C

*  Intrinsic noise at the input within the frequency range of 10 Hz from the frequency range upper limit

BC 312 Hydrophone Gallery

BC 313 Hydrophone

BC 313

Hydrophone BC 313 is a dynamic pressure transducer with even response curve throughout the complete range of frequencies observed in any homogeneous medium, including air, sea and fresh water; the hydrophones are also intended to address hydro acoustics issues: to measure sound pressure level in liquid media and to observe cavitation processes. These hydrophones use piezoceramic element as a signal transducer. The integrated amplifier allows transmitting signals via long submarine cables (down to 1,000 m ocean depth).

Hydrophone internal nodes are electrically insulated from the metal casing. Special attention has been paid to signal interference protection. This enables using hydrophones both in air and water reservoirs, where the electric potential of water differs from that of the earth as well as in cases of high electromagnetic field presence. These can be used to determine explosion pressure up to 1,000 kPa, pulse duration 2-5 ms (time sensitivity – approximately 0.1 ms).

  • balanced output hydrophone
  • operates in heavy interference environment
  • can be used with extra-long cable
  • detection of earthquakes in oceans
  • seismic studies at sea shelf.

Specifications

Designation BC 313
Version underwater threaded
Nominal sensitivity * 50 µV/Pa
500 µV/Pa
5,000 µV/Pa
Sensitivity level* (relative to 1V/µPa) -206 dB
-186 dB
-166 dB
Frequency band 20 to 20,000 Hz
Maximum value of measured sound pressure range*
(as per nominal sensitivity)		 50 kPa
10 kPa
1 kPa
Limit static line pressure 4 MPa 7 MPa
Self-noise** (as per nominal sensitivity) 0.2 Pa
0.1 Pa
0.01 Pa
Supply voltage (bipolar) ±10 to ±15 V
Current consumption 20 to 30 mA
Explosion-proof version — upon request
Casing material stainless steel
Dimensions (length × casing diameter) 173 × ⌀23 mm 171 × ⌀23 mm
Coupling thread — M20×1.5
Cable standard length 10 m 2 m
Maximum cable length 1,000 m
Cable outer diameter 6 mm
Cable type coaxial with PVC coating, central wire, screened, resistive to environment containing sulfuric acid
Cable connection end-piece with wires
Measurements operation environment water, air, oil and oil products, natural gas
Operation environment temperature 0 to +60 °C
Environment air temperature −60 to +80 °C

*The parameter shall be determined when placing an order. The default parameter is set for the nominal sensitivity of 500 µV/Pa, for special order, the parameter value is set at 50 µV/Pa or 5,000 µV/Pa.
**Self-noise referred to output in the frequency band: from 10 Hz to the band upper limit.

BC 313 hydrophone gallery

BC 314-M Hydrophone

BC 314-M

Digital hydrophones integrated sensing element allows starting measurements right after it is switched on since the measurement process does not require measuring channel adjustments: all the essential parameters are pre-installed in gauge memory. The output signal of digital transducers contains measured pressure values; no additional processing of the results is required.

Specifications

Parameter gauged instant values, RMS, peak Pa, kPa
Measuring range 100 kPa
Self-noise*, RMS 0.1 Pa
Frequency band 20 to 3,200 Hz
Type of transducers connected integrated piezo transducer
Tolerance limit of sound pressure range gauging 10%
Limit measured dynamic pressure 50 kPa
Limit hydrostatic pressure 7 MPa
Data output frequency 12,000, 8,000, 4,000, 2,000, 1,000, 500,
if non-instantaneous values output — 10 Hz
Data interface CAN 2.0
Device power 9 to 24
Current consumption at 12 V voltage up to 50 mA
Reading Frequency Response available (diagnostics)
Sensing element integrity check available (diagnostics)
Power check available (diagnostics)
Synchronization by Precision Time Protocol (PTP)
Casing material stainless steel
Dimensions (length × casing diameter) 171×⌀23 mm
Coupling thread M20×1.5
Cable length 2 m (standard)
Measurements operation environment water, air, oil and oil products, natural gas
Operation environment temperature 0 to +60 °C
Environment air temperature −60 to +80 °C

* Referred to output in frequency band from 10 Hz to the band upper limit.

BC 314-M Hydrophone Gallery