Ranging across a 3 to 500 m reference span
The BBDM-D33K is a 33 kHz underwater ultrasonic transducer for ranging and depth measurement. Its recommended range extends from 3 to 500 m, and the half-power beam angle is 48.4° ±10% at -3 dB. Applications include underwater robot obstacle avoidance, distance measurement in tanks and bodies of water, and underwater target detection.
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 or 1 MPa |
| Protection rating | IP68 |
Applications
- Underwater ranging and depth measurement
- Underwater robot obstacle avoidance
- Tank and water-body distance measurement
- Underwater target detection
Selection and integration
Selection should account for the operating medium and temperature, required acoustic path, target size and surface condition, available installation space, operating pressure, ingress protection, and the drive and receive electronics.