Measurement ultrasonic transducer BBFM-V49K

Overview
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

• Model: BBFM-V49K
• Center frequency: 49 kHz ±5%
• Recommended/reference range: 0.35 to 8 m
• Half-power beam angle: 11.2° ±10% at -3 dB
• 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
• Protection rating: IP68
• Weight: 210 g ±5% with 25 cm cable
• Mounting: refer to product dimensional drawing

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.

Technical characteristics / specifications

• Model: BBFM-V49K
• Center frequency: 49 kHz ±5%
• Range: 0.35–8 m
• Beam angle (-3 dB): 11.2° ±10%
• Impedance: ≥230 Ω ±20%
• Capacitance: 2400 pF ±20% (1 kHz)
• Peak voltage: <1500 Vpp
• Temperature: -40 to +80°C
• Pressure: ≤10 kgf / 1 MPa
• Ingress protection: IP68
• Weight: 210 g ±5% (25 cm cable)
• Mounting: see dimensional drawing