Product Overview
BBUEM-S is a clamp-on ultrasonic heating and cooling energy meter for small water pipes. The flow transducer and matched temperature sensors are secured to the outside of the pipes with dedicated brackets, eliminating the need to cut or modify the existing piping.
The meter measures water velocity, supply and return temperatures, and temperature difference, and calculates accumulated heating or cooling energy. It is designed for central HVAC, heating, heat-exchange, and building energy-management systems.
Key Features
- Dedicated configurations for DN15 to DN80 pipes
- Externally mounted flow transducer and temperature sensors
- No pipe cutting, process interruption, or contact with the liquid
- Pipe-size-specific mounting brackets
- OLED display for flow and accumulated energy
- 4–20 mA output and RS485 communication
Typical Applications
- Central HVAC chilled-water and cooling-water systems
- Small heating and heat-exchange systems
- Zoned building energy monitoring
- Industrial equipment cooling water
- Heating and cooling energy totalization
Technical Specifications
| Parameter | Value |
|---|---|
| Measurement principle | Ultrasonic transit time |
| Medium | Water |
| Velocity range | 0.1 to 5.0 m/s |
| Flow accuracy | ±2.0% |
| Repeatability | 0.8% |
| Pipe size | DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80 |
| Temperature sensors | PT1000 |
| Temperature measurement range | 2 to 105 °C |
| Medium temperature | 0 to 50 °C |
| Analog output | 4–20 mA, 600 Ω maximum load |
| Alarm output | Optional OCT upper- and lower-limit alarm |
| Communication | RS485 / Modbus; optional MeterBUS |
| Power supply | 24 VDC |
| Cable length | 1.8 m |
| Display | 128 × 64 OLED |
| Data storage | Daily, monthly, annual, and flow-totalizer records |
| Ambient temperature | 0 to 50 °C |
| Humidity | 0–95% RH, non-condensing |
| Protection rating | IP54 |
| Enclosure material | Aluminum alloy |
| Pipe materials | Stainless steel, carbon steel, and PVC |
Pipe Configurations
| Nominal Size | Reference Pipe OD | Reference Pipe ID | Reference Wall Thickness |
|---|---|---|---|
| DN15 | 20 mm | 15 mm | 2.5 mm |
| DN20 | 25 mm | 19 mm | 3 mm |
| DN25 | 32 mm | 26 mm | 3 mm |
| DN32 | 40 mm | 33 mm | 3.5 mm |
| DN40 | 50 mm | 43 mm | 3.5 mm |
| DN50 | 63 mm | 55 mm | 4 mm |
| DN65 | 75 mm | 67 mm | 4 mm |
| DN80 | 90 mm | 82 mm | 4 mm |
Measurements and Display
- Instantaneous flow
- Forward and net flow totals
- Supply and return temperatures
- Temperature difference
- Accumulated heating or cooling energy
- Daily, monthly, and annual accumulated records
Package Components
- Ultrasonic energy-meter transmitter
- Clamp-on flow transducer
- Two PT1000 temperature sensors
- Temperature-sensor mounting brackets
- Flow-transducer mounting bracket
- Connecting cables
Selection Information
- Nominal pipe size and actual outside diameter
- Pipe material, inside diameter, and wall thickness
- Heating or cooling application
- Medium and ambient temperatures
- Required output and communication interface