Product Overview
BBUFM-DP is a fixed dual-path ultrasonic liquid flow meter based on the transit-time principle. Two pairs of transducers establish two measurement paths on the same pipe. Flow rate, velocity, positive and negative net totals, and diagnostic information are available for each path.
The dual-path arrangement improves long-term measurement stability and provides additional information for assessing acoustic-path and installation conditions. The clamp-on transducers are installed outside the pipe without cutting it. Typical applications include water supply, water treatment, chemical processing, irrigation, and industrial process pipelines.
Key Features
- Two acoustic paths measuring the same pipe
- Independent flow, velocity, totalizer, and error diagnostics for each path
- Non-invasive clamp-on measurement with no contact with the liquid
- Designed for full pipes and liquids containing small amounts of bubbles or suspended solids
- 4–20 mA, pulse, relay, and RS485 outputs
- No moving parts, low pressure loss, and minimal maintenance
Typical Applications
- Critical water-supply and industrial circulating-water lines
- Water and wastewater treatment
- Chemical and industrial process liquids
- Irrigation and large water-transfer pipelines
- Measurement points requiring enhanced stability and diagnostics
Technical Specifications
| Parameter | Value |
|---|---|
| Measurement principle | Ultrasonic transit time |
| Acoustic paths | Dual path |
| Medium | Liquid in a full pipe |
| Velocity range | -12 to +12 m/s |
| Accuracy | ±0.5% of reading; ±0.01 m/s in the low-velocity range |
| Repeatability | 0.15% |
| Linearity | ±0.5% |
| Pipe size | DN25 to DN5000 |
| Analog output | 4–20 mA, 750 Ω maximum load |
| Pulse output | 0–9999 Hz, OCT |
| Relay output | SPST, 1 Hz maximum |
| Communication | RS485, Modbus protocol |
| Power supply | 24–36 VDC |
| Display | 3.5 in TFT LCD, 480 × 320 |
| Transmitter temperature | -40 to +60 °C |
| Standard transducer temperature | -40 to +80 °C |
| Humidity | Up to 95% RH, non-condensing |
| Applicable turbidity | 0–12000 NTU |
| Applicable pH range | 6–9 |
| Transmitter enclosure | Die-cast aluminum, IP54 |
| Transducer protection | IP68 |
| Transmitter weight | Approximately 1.5 kg |
| Standard transducer-set weight | Approximately 1.5 kg |
Display and Diagnostics
- Flow rate and velocity for both paths
- Positive, negative, and net flow totals
- Independent status display for each path
- Error numbers and diagnostic information
Transducers and Installation
| Item | Available Configuration |
|---|---|
| Standard transducers | Dual-path clamp-on transducers |
| Optional transducers | Insertion transducers |
| Standard cable length | 10 m |
| Extended cable | Up to 200 m in 5 m increments |
| Mounting method | V, N, Z, or W method |
| Transmitter mounting | Wall mounted |
Selection Information
- Pipe outside diameter or nominal diameter
- Pipe material, liner material, and wall thickness
- Liquid type, turbidity, and operating temperature
- Required flow or velocity range
- Transducer mounting arrangement
- Required outputs, communication, and cable length