Immersible ultrasonic transducer BBDM-D28K

low-frequencyfor level measurementfor obstacle detection

Product overview
The BBDM-D28K is a 28 kHz underwater ultrasonic transducer designed for accurate ranging and depth measurement with a reference range of 1000 m. It is suited for integration in maritime and subsea systems requiring long-range acoustic sensing, including ROVs and AUVs.

Acoustic coverage
Half-power beam angle (-3 dB): 53.7° ±10%. The beam profile supports medium-wide coverage for target detection and distance measurements in open water and confined tanks.

Electrical and environmental specifications (table)
Center frequency: 28 kHz ±5%
Recommended range (reference): 1000 m
Half-power beam angle (-3 dB): 53.7° ±10%
Minimum impedance: 270 Ω ±20%
Capacitance: 10000 pF ±20% at 1 kHz
Operating voltage: Peak voltage <2000 Vpp
Operating temperature: -40 to +80°C
Pressure rating: ≤10 kgf / 1 MPa
Protection rating: IP68

Applications

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

Technical specifications

• Center frequency: 28 kHz ±5%
• Recommended range (reference): 1000 m
• Half-power beam angle (-3 dB): 53.7° ±10%
• Minimum impedance: 270 Ω ±20%
• Capacitance: 10000 pF ±20% at 1 kHz
• Operating voltage: Peak voltage <2000 Vpp
• Operating temperature: -40 to +80°C
• Pressure rating: ≤10 kgf or 1 MPa
• Protection rating: IP68