Product Overview
BBUEM-DP is a fixed dual-path ultrasonic heating and cooling energy meter for large chilled-water, hot-water, and thermal-energy systems. It combines dual-path ultrasonic flow measurement with paired temperature measurement to calculate heating or cooling energy from liquid flow and supply/return temperature difference.
The dual-path arrangement is intended to provide improved flow-measurement stability, while clamp-on flow and temperature sensors allow standard installations to be completed without cutting the pipe. Wetted flow and temperature sensors are also available as optional configurations.
Key Features
- Dual-path ultrasonic flow measurement
- Heating and cooling energy calculation
- ±0.5% flow accuracy
- ±1.0% heating/cooling energy accuracy
- Pipe-size range from 25 to 5000 mm
- Matched temperature sensors with 0.02 °C matching error
- 4–20 mA, pulse/OCT, and relay outputs
- RS485 communication with Modbus protocol
- Clamp-on sensors as standard; wetted sensors optional
Typical Applications
- Central chilled-water plants
- Large-building HVAC energy monitoring
- District heating and cooling networks
- Industrial cooling-water and heat-exchange systems
- Plant utility and energy-management systems
- Large-pipe thermal-energy metering
Measurement Principle
Two ultrasonic paths measure the flow in the same pipeline. Thermal energy is then calculated from the measured flow rate and the temperature difference between the supply and return sides of the system.
Technical Specifications
| Parameter | Value |
|---|---|
| Flow measurement principle | Dual-path ultrasonic transit time |
| Velocity range | 0 to ±12 m/s |
| Flow accuracy | ±0.5% of measured value |
| Heating/cooling energy accuracy | ±1.0% |
| Temperature matching error | 0.02 °C |
| Pipe size | 25 to 5000 mm |
| Temperature measurement range | 2 to 105 °C |
| 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 flow-transducer temperature | -40 to 80 °C |
| Humidity | Up to 95% RH, non-condensing |
| Transmitter enclosure | Die-cast aluminum |
| Standard flow-transducer cable | 10 m |
| Temperature-sensor cable | 5 m |
Sensor Options
| Measurement | Standard | Optional |
|---|---|---|
| Flow | Clamp-on ultrasonic transducers | Wetted ultrasonic transducers |
| Temperature | Clamp-on temperature sensors | Wetted temperature sensors |
Selection Information
- Pipe outside diameter and wall thickness
- Pipe material and lining, if any
- Heating or cooling medium
- Supply and return temperature range
- Expected flow range
- Clamp-on or wetted sensor requirement
- Required cable length
- Required output and communication interface