Product Overview
BBFM-V145K is a 145 kHz ultrasonic transducer developed for mine airflow measurement equipment. It is suitable for tunnel ventilation, mine air-velocity measurement, and airflow monitoring. The transducer can be integrated into ultrasonic airflow measurement systems that determine air velocity from ultrasonic signal propagation through the measurement path.
The product features an ABS housing, IP65 protection, and an operating temperature range suitable for mine-tunnel and industrial ventilation monitoring equipment.
Key Features
- 145 kHz center resonant frequency
- 14° nominal beam angle
- Designed for mine-tunnel airflow measurement
- IP65 protection
- ABS housing
- -20 to 70 °C operating temperature
Technical Specifications
| Parameter | Value |
|---|---|
| Center resonant frequency | 145 kHz ±4% |
| Bandwidth | 12 kHz |
| Transmitting beam angle (-3 dB full angle) | 14° ±2° |
| Sensitivity | ≥ -34 dB |
| Sensitivity test conditions | 5 Vp-p, continuous wave, 5 cm distance |
| Capacitance | 650 pF ±20% |
| Minimum parallel impedance | 700 Ω ±30% |
| Maximum operating voltage | 500 Vp-p, pulse, 2% duty cycle |
| Operating temperature | -20 to 70 °C |
| Storage temperature | -40 to 85 °C |
| Protection rating | IP65 |
| Housing material | ABS |
| Parameter test temperature | 25 °C |
Typical Applications
- Air-velocity and airflow measurement in mine tunnels
- Ultrasonic mine airflow measurement equipment
- Industrial ventilation and airflow monitoring