Ultrasonic BTU Meter
Applications
- Residential submetering
- Commercial buildings
- District heating / cooling
- HVAC
- Green energy management
- AMR and Billing
Features
- Wear-free. Maintenance-free
- Unique sensor design for robust performance in both clear water and dirty water
- Multipath technology for increased accuracy
- Excellent long-term stability. Accuracy does not degrade over time
- Exceed OIML R75 class 2. Billing grade
- IP68 water-proof rated for the sensor, IP67 for the integrator
- Powered by both battery and MBus for extended lifespan
- For both heating and cooling circuits
- Free positioning
- Ready for AMR with M-Bus / Modbus / BACnet interface
- Low cost over the long run
- Data Logger with 18 monthly totals
- SpireCapture AMR/AMI and Billing solutions
Electrical Data
Power Supply: Battery, 3.6V, Lithium. Alternatively, the meter could be powered by MBus with current draw of less than 3mA
Replacement Interval: 5 years at tBAT <30°C
Power Consumption: <0.2W
Standby Current: <10uA
Backup Power Supply: Internal SuperCap
Communication Interface: M-Bus (default). Optional: RS485 with MODBUS, or BACnet/MSTP
CE approval: EN61326-1:2006
Accuracy / MPE (Maximum Permissible Error)
MPE according to OIML R75 / EN1434, the whole system error is the combination of the following:
Calculator (Integrator): Ec = ± (0.5 + ΔΘmin /ΔΘ)
Temperature Sensor: Et = ± (0.5 + 3ΔΘmin /ΔΘ)
Flow Sensor: Ef = ± (2 + 0.02 qn /q)
Here ΔΘ is the temperature difference between the flow and return of the heat exchange
circuit. q is the flow rate and qp is the nominal flow rate.
NOTE: The actual error of 280T meters is much smaller than the above MPE.
Calculator (Integrator)
Display: LCD, 8 digits
Resolution: 999.99999 – 999999.99 – 99999999
Energy Unit: KWh – MWh – GJ
Communication Protocol: M-Bus (default). Optional: MODBUS or BACnet
Ultrasonic BTU Meter
DN Size (mm) | Flowrate (m3/h) | Dimension (mm) | Weight (kg) | Pipe Joint** (BSP / DIN) | |||||
Qmin | Qn | Qmax | L | W | H | Sensor | Ext. | ||
DN15 | 0.03 | 1.5 | 3 | 110 | 120 | 100 | 1.2 | G3/4B | G1/2B |
DN20 | 0.05 | 2.5 | 5 | 130 | 120 | 105 | 1.2 | G1B | G3/4B |
DN25 | 0.07 | 3.5 | 7 | 160 | 120 | 110 | 1.6 | G1 1/4B | G1B |
DN32 | 0.12 | 6 | 12 | 180 | 120 | 120 | 2.2 | G1 1/2B | G1 1/4B |
DN40 | 0.2 | 10 | 20 | 200 | 120 | 125 | 2.8 | G2B | G1 1/2B |
DN50 | 0.6 | 15 | 30 | 200 | 165 | 197 | 10.8 | 4-M16 | |
DN65 | 1 | 25 | 50 | 200 | 185 | 211 | 14.5 | 4-M16 | |
DN80 | 1.6 | 40 | 80 | 225 | 200 | 227 | 16.9 | 8-M16 | |
DN100 | 2.4 | 60 | 120 | 250 | 220 | 247 | 19.9 | 8-M16 | |
DN125 | 4 | 100 | 200 | 250 | 250 | 242 | 26.2 | 8-M16 | |
DN150 | 6 | 150 | 300 | 300 | 285 | 277 | 29.0 | 8-M20 | |
DN200 | 10 | 250 | 500 | 350 | 340 | 327 | 48.9 | 12-M20 | |
DN250 | 16 | 400 | 800 | 450 | 405 | 412 | 93.9 | 12-M22 | |
DN300 | 24 | 600 | 1200 | 500 | 460 | 467 | 13.9 | 12-M22 |