Hydrophone BBUA-H7K

Low-frequency reception for underwater noise work
The BBUA-H7K is a hydrophone and underwater noise receiver with a standard center-frequency specification of 7 kHz ±1 kHz. The standard version is specified for a reference detection range of 300 m, making it suitable for low-frequency hydroacoustic monitoring and measurement tasks in maritime environments.

Electrical and environmental data
The receiver features a minimum impedance of 18,000 Ω ±20% and a capacitance of 8,000 pF ±20% measured at 1 kHz. The peak-voltage limit is below 600 Vpp. Operational limits include a temperature range of -40 to +80°C, a pressure rating up to ≤10 kgf (≈1 MPa), and IP68 protection for prolonged submersion.

Technical specifications
Model: BBUA-H7K
Standard center frequency: 7 kHz ±1 kHz
Recommended range: 300 m
Minimum impedance: 18,000 Ω ±20%
Capacitance: 8,000 pF ±20% at 1 kHz
Peak-voltage limit: <600 Vpp
Operating temperature: -40 to +80°C
Pressure rating: ≤10 kgf or 1 MPa
Housing materials: Aluminum and POM
Protection rating: IP68
Weight: 300 g ±5% with 1 m cable

Available frequency tolerance
Center-frequency configuration — Recommended range
7 kHz ±1 kHz — 300 m
7 kHz ±2 kHz — 300 m

Applications

• Underwater noise monitoring
• Hydroacoustic listening
• Vessel and machinery noise testing
• Underwater acoustic experiments

Technical characteristics / specifications

• Model: BBUA-H7K
• Standard center frequency: 7 kHz ±1 kHz
• Available center-frequency tolerance: 7 kHz ±1 kHz; 7 kHz ±2 kHz
• Recommended range: 300 m
• Minimum impedance: 18,000 Ω ±20%
• Capacitance: 8,000 pF ±20% at 1 kHz
• Peak-voltage limit: <600 Vpp
• Operating temperature: -40 to +80°C
• Pressure rating: ≤10 kgf or 1 MPa
• Housing materials: Aluminum and POM
• Protection rating: IP68
• Weight: 300 g ±5% with 1 m cable