High-frequency ultrasonic transducer BBFM-V105K

measurement

Overview The BBFM-V105K is an ultrasonic transducer intended for use in 2D and 3D anemometers, meteorological monitoring, ventilation airflow measurement and industrial duct monitoring. It has a center frequency of 105 kHz ±5% and a recommended working range of 0.15 to 3 m. The unit features an LY12 housing, IP68 protection and a 2 m cable; typical weight is 50 g ±5%.

Beam geometry The half-power (-3 dB) beam angle is 9.1° ±10%. Sensor layout and the acoustic path between transmit and receive elements should account for this beam geometry to ensure measurement accuracy.

Technical specifications

• Model: BBFM-V105K
• Center frequency: 105 kHz ±5%
• Recommended range: 0.15 to 3 m
• Minimum impedance: 540 Ω ±20%
• Capacitance: 1200 pF ±20% at 1 kHz
• Operating voltage: Peak voltage <800 Vpp
• Operating temperature: -40 to +80°C
• Pressure rating: ≤3 kgf / 0.3 MPa
• Half-power beam angle: 9.1° ±10% at -3 dB
• Housing material: LY12
• Mounting: Refer to dimensional drawing
• Protection rating: IP68
• Weight: 50 g ±5% with 2 m cable

Specified monitoring applications

• 2D and 3D ultrasonic anemometers
• Meteorological monitoring
• Ventilation airflow measurement
• Industrial duct monitoring

System integration Transmit and receive electronics must be matched to the minimum impedance (540 Ω ±20%) and capacitance (1200 pF ±20% at 1 kHz). Peak voltage must remain below 800 Vpp. Verify mechanical space and alignment using the dimensional drawing. Installations must operate within -40 to +80°C and below 3 kgf (0.3 MPa) while maintaining IP68 protection.