In multi-tenant buildings and district cooling, each consumer should pay for the cooling energy they actually use. The YF-E6 clamp-on energy meter calculates thermal energy from flow and supply/return temperature, installed on existing pipes without shutdown.
The challenge
- Tenants need fair, usage-based cooling allocation.
- Existing chilled-water pipes cannot be cut for an inline heat meter.
- Energy calculation needs accurate flow and paired temperature.
- Billing systems require reliable serial data.
The solution: YF-E6
The YF-E6 is a clamp-on ultrasonic energy meter combining flow measurement with matched supply/return temperature sensors. See the YF-E6 specifications →
- Flow accuracy ±1.0%, energy accuracy ±2.0%.
- Temperature-pairing accuracy ±0.2 °C.
- DN25-DN2000 pipe range.
- RS485 Modbus RTU and 4-20 mA output.
- 24 VDC with backup for metering continuity.
Configuration used in this application
| Meter | YF-E6 clamp-on ultrasonic energy meter |
|---|---|
| Flow accuracy | ±1.0% (0.5-5.0 m/s) |
| Energy accuracy | ±2.0% |
| Temperature pairing | ±0.2 °C |
| Pipe size | DN25-DN2000 (1″-80″) |
| Power supply | 24 VDC @ 5 W (CR1220 backup) |
| Communication | RS485, Modbus RTU |
| Analog output | 4-20 mA (load ≤750 Ω) |
How it is deployed
- Install flow transducers on the chilled-water line to the tenant or zone.
- Mount and pair supply/return temperature sensors.
- Wire 24 VDC and connect Modbus to the energy/billing system.
- Verify pairing and totalize energy for the billing period.
What the operator gets
- Fair, measured cooling-energy allocation.
- Installation on live systems without shutdown.
- Accurate paired temperature for credible energy data.
- Reliable data feed for billing and reconciliation.
Frequently asked questions
How does the YF-E6 calculate cooling energy?
It combines clamp-on flow measurement with matched supply and return temperature sensors to calculate thermal energy over time.
Can it be installed on operating chilled-water pipes?
Yes, the flow sensors clamp externally, so the system keeps running with no pipe cutting.
How accurate are the flow and temperature measurements?
Flow accuracy is +/-1.0%, energy accuracy +/-2.0% and paired temperature accuracy is +/-0.2 C.
Have a similar requirement?
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