Low-frequency ultrasonic flow measurement in hot flue gas
The BBFM-Q25K-B is a 25 kHz ultrasonic flow transducer for high-temperature flue-gas service. It is intended for flue-gas flow measurement, boiler exhaust monitoring, industrial emission ducts and transit-time measurement in high-temperature gases.
Technical specifications
| Parameter | Specification |
|---|---|
| Model | BBFM-Q25K-B |
| Center frequency | 25 kHz ±5% |
| Minimum impedance | 350 Ω ±20% |
| Capacitance | 6,000 pF ±20% at 1 kHz |
| Operating voltage | Peak voltage <3,000 Vpp |
| Operating temperature | -40 to +150°C |
| Pressure rating | ≤3 kgf or 0.3 MPa |
| Housing material | Titanium alloy |
| Protection rating | IP68 |
Applications
- Flue-gas flow measurement
- Boiler exhaust monitoring
- Industrial emission ducts
- High-temperature gas transit-time measurement
Selection and integration
Selection should account for the gas composition and temperature, required acoustic path, duct geometry, available installation space, operating pressure, ingress protection, and the drive and receive electronics.