20Hz-100kHz Underwater Spherical Hydrophone Transducer Arrays for Underwater Projectors

20Hz-100kHz Underwater Spherical Hydrophone Transducer Arrays for Underwater Projectors

The hydrophones are divided into HSRHS-20 standard hydrophone, HSRHSA-20 standard hydrophone with built-in preamplifier and external preamplifier.

1. The standard hydrophone has the following characteristics:

1. Good directionality. The hydrophone has no directivity horizontally, and no directivity within 240° of the vertical plane.

2. The frequency range is wide, which can cover most of the frequency bands for underwater acoustic measurement.

3. Flat sensitivity response.

4. Good stability and high reliability.

2. The main technical indicators of standard hydrophones:

Operating frequency range: 20Hz～100kHz

Linear frequency range: 20Hz～50kHz

Low frequency receiving sensitivity: -198dB

Horizontal directivity: ±1.5dB (100kHz)

Vertical directivity: ±2.0dB (100kHz, 240° range)

Maximum working depth: 500 meters

3. Directivity diagram of typical frequency

     100kHz horizontal directivity                       100kHz vertical directivity

4.sensitivity curve of Free-field open circuit voltage

5. the external dimensions and the definition of the core wire at the end of the cable

Definition of the core wire at the end of the cable: red wire-signal +; black wire-signal -; shielded wire-ground wire; the standard length of the cable is 15 meters

6. HSRHSA-20 is a standard  hydrophone with built-in preamplifier, which has the following advantages:

1. The sound pressure sensitivity can be adjusted based on requirements. By adjusting the gain of the preamplifier, the sound pressure sensitivity of the domestic hydrophone can be changed to meet the needs of actual measurement.

2. Suitable for long-distance signal transmission. The preamplifier converts the high impedance of the piezoelectric element into low impedance, greatly reducing the coupling loss caused by long cables and reducing the geomagnetic interference during transmission.

3. Main technical indicators: fixed gain plus 20dB, 0~50 dB can be adjusted to match the preamplifier.

Adjustable preamplifier: general voltage amplifier, single-ended input, single-ended output, output uses a standard BNC socket, the amplifier is connected to the RHSA series hydrophone, provides power for the hydrophone, receives the output signal of the hydrophone, amplifies it, and then plays a filtering role. Amplifier operating frequency: 1KHz~50 KHz, 0~50 dB adjustable, the step value is 10dB.