Radial ultrasonic transducer BBDM-D20K

immersiblelow-frequencyfor level measurement

Product overview
The BBDM-D20K is a 20 kHz ultrasonic transducer for underwater ranging and depth measurement with a reference range of 2000 m. It delivers a horizontally omnidirectional acoustic field and IP68 protection for submerged installations. Suited for integration in ROVs, AUVs, fixed marine sensors and tank measurement systems.

Key features

• Center frequency: 20 kHz ±5%
• Recommended range: 2000 m
• Acoustic field: horizontally omnidirectional
• Minimum impedance: 50 Ω ±20%
• Capacitance: 28000 pF ±20% at 1 kHz
• Operating voltage: peak voltage <500 Vpp
• Operating temperature: -10 to +40°C
• Pressure rating: ≤3 kgf (0.3 MPa)
• Protection rating: IP68

Electrical and operating data

• Center frequency: 20 kHz ±5%
• Minimum impedance: 50 Ω ±20%
• Capacitance: 28000 pF ±20% at 1 kHz
• Peak operating voltage: <500 Vpp
• Operating temperature: -10 to +40°C
• Pressure rating: ≤3 kgf / 0.3 MPa
• Protection rating: IP68

Applications

• Underwater ranging and depth measurement
• Obstacle avoidance for underwater robots (ROVs/AUVs)
• Distance measurement in tanks and water storage bodies
• Underwater target detection and monitoring

Technical specifications

• Center frequency: 20 kHz ±5%
• Recommended range: 2000 m
• Impedance: ≥50 Ω ±20%
• Capacitance: 28000 pF ±20% (1 kHz)
• Peak voltage: <500 Vpp
• Temperature range: -10 to +40°C
• Pressure rating: ≤0.3 MPa
• Ingress protection: IP68