Product Overview
BBUFM-DP is a fixed dual-path clamp-on ultrasonic liquid flow meter for applications requiring improved measurement stability and redundancy. Two ultrasonic paths measure the same pipeline, helping reduce the influence of local flow-profile distortion and providing more robust continuous measurement than a conventional single-path arrangement.
The meter is designed for large-pipe water and industrial-liquid applications and uses external clamp-on transducers, allowing installation without cutting the pipe or creating additional pressure loss.
Key Features
- Dual-path ultrasonic transit-time measurement
- Non-invasive clamp-on installation
- ±0.5% flow accuracy
- Pipe-size range from 25 to 5000 mm
- 4–20 mA, pulse/OCT, and relay outputs
- RS485 communication with Modbus protocol
- 3.5-inch TFT display
- Die-cast aluminum transmitter enclosure, IP54
- Clamp-on transducers with IP68 enclosure
Typical Applications
- Large water-supply pipelines
- Water-treatment plants
- Industrial process-water systems
- Cooling-water networks
- Utility flow monitoring
- Applications requiring dual-path measurement stability
Technical Specifications
| Parameter | Value |
|---|---|
| Measurement principle | Dual-path ultrasonic transit time |
| Velocity range | 0 to ±12 m/s |
| Accuracy | ±0.5% of measured value |
| Repeatability | 0.15% |
| Linearity | ±0.5% |
| Pipe size | 25 to 5000 mm |
| Path number | 2 |
| Analog output | 4–20 mA, maximum load 750 Ω |
| Pulse output | 0–9999 Hz, OCT |
| Relay output | SPST, max. 1 Hz |
| Communication | RS485, Modbus protocol |
| Power supply | 24–36 VDC |
| Display | 3.5-inch TFT LCD, 480 × 320 |
| Transmitter operating temperature | -40 to 60 °C |
| Standard transducer temperature | -40 to 80 °C |
| Humidity | Up to 95% RH, non-condensing |
| Transmitter enclosure | IP54, die-cast aluminum |
| Clamp-on transducer enclosure | IP68 |
| Standard transducer cable length | 10 m |
Water Application Capability
For water applications, the original product specification lists a turbidity range of 0 to 12,000 NTU and pH 6 to 9, and indicates suitability for water with or without bubbles. Actual performance should still be confirmed according to pipe condition, bubble content, solids concentration, and signal quality.
Installation
Two pairs of clamp-on transducers form two independent ultrasonic paths on the same pipeline. Proper transducer spacing, pipe preparation, and straight-run selection are required for stable measurement.
Selection Information
- Pipe outside diameter and wall thickness
- Pipe material and lining, if any
- Liquid name, turbidity, and temperature
- Expected flow range
- Available straight-pipe length
- Required cable length
- Required output and communication interface