49 kHz ultrasonic path for wind measurement
The BBFM-V49K is specified for 2D and 3D ultrasonic anemometers, meteorological monitoring, ventilation airflow measurement and industrial duct monitoring. Its center frequency is 49 kHz ±5%, with a reference range of 0.35 to 8 m.
The half-power beam angle is 11.2° ±10% at -3 dB. This beam width and the required acoustic path should guide the spacing and alignment of transducers in the measurement assembly.
Technical specifications
| Parameter | Specification |
|---|---|
| Model | BBFM-V49K |
| Center frequency | 49 kHz ±5% |
| Recommended range | 0.35 to 8 m |
| Minimum impedance | 230 Ω ±20% |
| Capacitance | 2400 pF ±20% at 1 kHz |
| Operating voltage | Peak voltage <1500 Vpp |
| Operating temperature | -40 to +80°C |
| Pressure rating | ≤10 kgf or 1 MPa |
| Half-power beam angle | 11.2° ±10% at -3 dB |
| Mounting | Refer to product dimensional drawing |
| Protection rating | IP68 |
| Weight | 210 g ±5% with 25 cm cable |
Specified monitoring applications
- 2D and 3D ultrasonic anemometers
- Meteorological monitoring
- Ventilation airflow measurement
- Industrial duct monitoring
Integration checks
The transmit and receive electronics should be matched to a minimum impedance of 230 Ω ±20% and capacitance of 2400 pF ±20% at 1 kHz. Peak voltage must remain below 1500 Vpp.
Check the dimensional drawing for the mounting interface and alignment. Operation must remain between -40 and +80°C and at no more than 10 kgf or 1 MPa, while preserving the stated IP68 protection.