Digital heat meter BBUEM-F

ultrasonic4-20 mAModbus

Product Overview
BBUEM-F is a fixed ultrasonic instrument for monitoring heating and cooling energy in closed water systems. It uses transit-time ultrasonic flow measurement combined with paired temperature inputs to calculate instantaneous power and accumulated energy from flow rate and supply–return temperature difference. External clamp-on flow transducers minimize pipe modification and process downtime, making the meter suitable for central HVAC, district heating/cooling, heat-exchange stations, boiler systems, energy management and industrial circulating-water monitoring.

Key Features

• Measures flow, supply and return temperatures, temperature difference and accumulated heating/cooling energy
• Clamp-on flow measurement without cutting the pipe
• Two matched temperature inputs (PT1000)
• Analog (4–20 mA), pulse, relay and RS485 (Modbus) communication outputs
• Forward, reverse and net flow totalization
• Standard and extended versions for different accuracy and pipe-size requirements

Typical Applications

• Chilled-water and cooling-water systems
• District heating and district cooling networks
• Heat-exchange stations and boiler systems
• Building energy management and metering
• Industrial circulating-water and process-energy monitoring

Technical Specifications

• Model: BBUEM-F (fixed ultrasonic heating and cooling energy meter)
• Flow measurement principle: Ultrasonic transit time
• Medium: Liquid in a full pipe
• Velocity range: -12 to +12 m/s
• Velocity accuracy: Standard ±1.0% of reading; Extended ±0.5% of reading
• Low-velocity accuracy: ±0.01 m/s
• Energy-meter accuracy class: Class 2
• Pipe size: Standard DN25 to DN2000; Extended DN25 to DN5000
• Display: Standard 2.2 in TFT LCD (320×240); Extended 2.8 in TFT LCD (320×240)
• Analog output: 4–20 mA, 750 Ω max load
• Pulse output: 0–9999 Hz
• Relay output: SPST, 1 Hz max
• Communication: RS485, Modbus protocol
• Power supply: 24–36 VDC
• Transmitter operating temperature: -40 to +60 °C
• Flow-transducer temperature range: -40 to +80 °C
• Temperature-sensor range: -10 to +105 °C
• Humidity: Up to 95% RH, non-condensing
• Transmitter enclosure: Standard engineering plastic; Extended CNC-machined aluminum alloy

Sensor Configuration

• Flow transducers: External clamp-on; insertion type optional
• Temperature sensors: Matched PT1000 sensors
• Temperature-sensor mounting: Clamp-on or insertion
• Standard cable length: 10 m
• Flow-transducer mounting methods: V, N, Z or W

Measurement Functions

• Instantaneous flow and velocity
• Forward, reverse and net flow totals
• Supply and return temperatures
• Temperature difference (ΔT)
• Instantaneous heating or cooling power
• Accumulated heating or cooling energy

Selection Information

• Specify heating or cooling application
• Provide pipe outside diameter, material and wall thickness
• Provide liner material and thickness if present
• Specify liquid type and operating-temperature range
• Provide expected flow range and temperature difference
• Choose temperature-sensor mounting method (clamp-on or insertion)
• Specify required outputs, communication protocol and cable length