Digital heat meter BBUEM-S

ultrasonic4-20 mAModbus

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 (table)
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 (reference)
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

Caractéristiques / Spécifications techniques

• Measurement principle: Ultrasonic transit time
• Medium: Water
• Velocity range: 0.1 to 5.0 m/s
• Flow accuracy: ±2.0%
• Repeatability: 0.8%
• Pipe sizes supported: DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80
• Temperature sensors: PT1000
• Temperature measurement range: 2 to 105 °C
• Medium temperature range: 0 to 50 °C
• Analog output: 4–20 mA (600 Ω max load)
• 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
• Compatible pipe materials: Stainless steel, carbon steel, PVC