Ultrasonic heat meter BBUEM-R

RS485wirelessIoT

Product overview
The BBUEM-R is an inline ultrasonic energy meter that calculates heating and cooling energy using transit-time flow measurement combined with supply and return temperature sensing. The meter has no mechanical moving parts and is designed for residential and commercial buildings, boiler mains, heat-exchange stations and district heating/cooling networks. Sizes DN15 to DN200 are available. The device supports forward and reverse measurement, low-flow detection, local data storage and remote reading via RS485, M‑Bus or infrared; NB‑IoT and LoRaWAN are available as options.

Key features

• Measurement of heating and cooling energy
• Integrated inline installation without moving measuring components
• Dual‑channel ultrasonic transit‑time measurement
• Wide measuring range (R100)
• Forward and reverse flow measurement
• Low‑power intelligent operation
• Local data storage for 24 months
• Protection rating IP68
• Selectable energy units (kWh, GJ, Gcal)

Flow specifications
Nominal size | Permanent flow Q3 | Maximum flow Qs | Minimum flow Qi
DN15 | 1.5 m³/h | 3.0 m³/h | 0.015 m³/h
DN20 | 2.5 m³/h | 5.0 m³/h | 0.025 m³/h
DN25 | 3.5 m³/h | 7.0 m³/h | 0.035 m³/h
DN32 | 6.0 m³/h | 12 m³/h | 0.06 m³/h
DN40 | 10 m³/h | 20 m³/h | 0.10 m³/h
DN50 | 15 m³/h | 30 m³/h | 0.15 m³/h
DN80 | 40 m³/h | 80 m³/h | 0.40 m³/h
DN100 | 60 m³/h | 120 m³/h | 0.60 m³/h
DN150 | 150 m³/h | 300 m³/h | 1.50 m³/h
DN200 | 250 m³/h | 500 m³/h | 2.50 m³/h

Typical applications

• Residential heating sub‑metering
• Energy billing in apartments and commercial buildings
• District heating and cooling systems
• Boiler mains and heat‑exchange stations
• Building energy management and remote meter reading

Technical specifications

• Nominal sizes: DN15 to DN200
• Measuring range: R100
• Accuracy class: Class 2
• Temperature‑difference range: 3 to 75 K
• Operating temperature range: 4 to 95 °C
• Maximum working pressure: 1.6 MPa
• Construction: integrated inline
• Communication standards: CJ/T 188‑2018, EN 1434
• Data interfaces: RS485, M‑Bus, infrared
• Optional wireless: NB‑IoT, LoRaWAN
• Battery: 3.6 V lithium
• Battery life options: 6, 11 or 15 years
• Protection rating: IP68
• Ambient temperature: -15 to +70 °C
• Ambient humidity: <100% RH
• Electromagnetic environment: E1
• Data storage: 24 months
• Static current: <12 μA
• Average operating current: <25 μA
• Energy units: kWh, GJ or Gcal