Ultrasonic heat meter BBUEM-P

GPRS4-20 mAModbus

Product overview
The BBUEM-P measures heating and cooling energy in DN15 to DN40 water systems. It combines ultrasonic flow measurement with matched PT1000 platinum resistance sensors on supply and return pipes to calculate accumulated energy for heating or cooling. Inline construction is available in copper or stainless-steel bodies. Infrared, RS485 and M-Bus are standard communication interfaces; 4-20 mA, RF and GPRS are optional. The meter supports prepaid operation and can be fitted with an optional heat-control valve.

Key features

• Separate measurement of heating and cooling energy
• Inline installation for DN15–DN40
• Matched PT1000 temperature sensors (0.06 °C matching)
• Measuring range R50 (Qp/Qi = 50)
• No mechanical rotating parts
• Copper or stainless-steel body; horizontal or vertical installation
• Stores 18 months of historical data
• Infrared, RS485 and M-Bus standard communications; optional 4-20 mA, RF, GPRS
• Supports prepaid operation and optional heat-control valve

Flow specifications
Nominal size | Maximum flow Qs | Permanent flow Qp | Minimum flow Qi
DN15 | 3 m³/h | 1.5 m³/h | 0.03 m³/h
DN20 | 5 m³/h | 2.5 m³/h | 0.05 m³/h
DN25 | 7 m³/h | 3.5 m³/h | 0.07 m³/h
DN32 | 12 m³/h | 6 m³/h | 0.12 m³/h
DN40 | 20 m³/h | 10 m³/h | 0.2 m³/h

Technical specifications
Parameter | Specification
Measured medium | Water or homogeneous liquid
Nominal sizes | DN15, DN20, DN25, DN32, DN40
Flow-measurement accuracy | ±2%
Energy-meter accuracy class | Class 2 or Class 3
Measuring range Qp/Qi | 50
Nominal pressure | 1.6 MPa
Pressure loss | <0.015 MPa
Temperature sensors | Matched PT1000 platinum resistance sensors
Sensor matching tolerance | 0.06 °C
Temperature-difference range (heating) | 3 to 75 K
Temperature-difference range (cooling) | 2 to 75 K
Temperature resolution | 0.01 °C
Body material | Copper or stainless steel
Protection rating | IP65
Battery | 3.6 V lithium battery; life > 6 years
Data storage | 18 months
Standard communication | Infrared, RS485, M-Bus
Optional communication | 4-20 mA, RF, GPRS
Communication protocols | Modbus, CJ/T 188 or custom protocol
Installation | Inline on supply or return pipe; horizontal or vertical
Optional configurations | Prepaid operation, remote monitoring, heat-control valve

Typical applications

• Residential and apartment heating measurement
• Energy billing in small commercial buildings
• Fan-coil units and branch-line energy measurement
• Sub-metering in heating and cooling systems
• Prepaid and remote meter-reading projects

Model and technical data

• Model: BBUEM-P
• Measured medium: Water or homogeneous liquid
• Nominal sizes: DN15, DN20, DN25, DN32, DN40
• Flow accuracy: ±2%
• Energy accuracy class: Class 2 or Class 3
• Measuring range (Qp/Qi): 50 (R50)
• Nominal pressure: 1.6 MPa
• Pressure loss: <0.015 MPa
• Temperature sensors: Matched PT1000; tolerance 0.06 °C
• Temperature ranges: Heating 3–75 K; Cooling 2–75 K
• Temperature resolution: 0.01 °C
• Body material: Copper or stainless steel
• Protection: IP65
• Power: 3.6 V lithium battery; life > 6 years
• Data storage: 18 months
• Communications: Infrared, RS485, M-Bus; optional 4-20 mA, RF, GPRS
• Protocols: Modbus, CJ/T 188 or custom
• Installation: Inline on supply or return; horizontal or vertical
• Optional: Prepaid operation, remote monitoring, heat-control valve