BC 313
Hydrophone BC 313 underwater with balance output — 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. 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 hydroacoustics issues: to measure sound pressure level in liquid media and to observe cavitation processes. Hydrophone BC 313 uses 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. Hydrophone BC 313 can be used to determine explosion pressure up to 1,000 kPa, pulse duration 2-5 ms (time sensitivity – approximately 0.1 ms). ADVANTAGES: non-dismantling control; screened sensing element; corrosion-resistant casing; low-noise connection cable.
Features
Designation: BC 313 | Version: underwater / threaded | Nominal sensitivity: 50 / 500 / 5,000 µV/Pa (order-specific; default 500 µV/Pa) | Sensitivity level (rel. 1V/µPa): -206 / -186 / -166 dB | Frequency band: 20…20,000 Hz | Max. measured sound pressure range (per nominal sensitivity): 50 / 10 / 1 kPa | Limit static line pressure: 60 MPa | Self-noise (per nominal sensitivity): 0.2 / 0.1 / 0.01 Pa | Supply voltage (bipolar): ±10…±15 V | Current consumption: 20…30 mA | Explosion-proof version: — (underwater) / upon request (threaded) | Casing material: stainless steel | Dimensions (length × casing diameter): 173×⌀23 mm (underwater) / 171×⌀23 mm (threaded) | Coupling thread: — (underwater) / M20×1.5 (threaded) | Cable standard length: 10 m (underwater) / 2 m (threaded) | Max. cable length: 1,000 m | Cable outer diameter: 6 mm | Cable type: coaxial with PVC coating, central wire, screened, sulfuric-acid resistant | Cable connection: end-piece with wires | Measurements operation environment: water, air, oil and oil products, natural gas | Operation environment temperature: 0…+60 °C | Environment air temperature: −60…+80 °C
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