Immersible ultrasonic transducer BBDM-D33K

for obstacle detectionmeasurementfor level measurement

Product overview
The BBDM-D33K is a 33 kHz underwater ultrasonic transducer designed for ranging and depth measurement. Recommended operating range is 3 to 500 m. Typical half-power beam angle is 48.4° ±10% at -3 dB. Suitable for integration in marine and submersible systems requiring long-range acoustic sensing.

Acoustic and electrical data
Parameter — Specification
Model — BBDM-D33K
Center frequency — 33 kHz ±5%
Recommended range — 3 to 500 m
Half-power beam angle at -3 dB — 48.4° ±10%
Minimum impedance — 60 Ω ±20%
Capacitance — 5,000 pF ±20% at 1 kHz
Operating voltage — Peak voltage <1500 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 and ROVs
• Distance measurement in tanks, basins and natural water bodies
• Underwater target detection and monitoring

Selection and integration
Select the transducer considering fluid medium and temperature, required acoustic path and detection range, target size and surface properties, available mounting space, operating pressure and ingress protection. Ensure compatible drive and receive electronics and appropriate impedance matching.

Technical specifications

• Model: BBDM-D33K
• Center frequency: 33 kHz ±5%
• Recommended range: 3 to 500 m
• Half-power beam angle (at -3 dB): 48.4° ±10%
• Minimum impedance: 60 Ω ±20%
• Capacitance: 5,000 pF ±20% at 1 kHz
• Operating voltage: Peak voltage <1500 Vpp
• Operating temperature: -40 to +80°C
• Pressure rating: ≤10 kgf / 1 MPa
• Ingress protection: IP68