Electromagnetic & Coriolis flow meters engineered for the precise, repeatable measurement required by modern liquid-cooled data center infrastructure.
Coolant flow rate is the single most critical variable in liquid cooling control — directly linking compute thermal load to chiller and CDU capacity. Under- or over-reported flow leads to thermal alarms, pump cavitation, or wasted pumping energy.
Supmea's SUP-LDG electromagnetic and SUP-DMF Coriolis flow meters deliver the accuracy, media compatibility, and communication interfaces that data center BMS/DCIM platforms require — from primary facility water loops down to rack-level technology cooling system (TCS) manifolds.
| Measurement principle | Electromagnetic induction (Faraday's law) |
|---|---|
| Pipe size range | DN10 – DN2000 (3/8" – 80") |
| Flow velocity range | 0.1 – 15 m/s |
| Accuracy | ±0.2% of reading (standard), ±0.5% (economy) |
| Repeatability | ≤ 0.1% of reading |
| Media conductivity | ≥ 5 µS/cm (standard); ≥ 1 µS/cm (high-sensitivity) |
| Process temperature | −20 °C to +120 °C (PTFE lining) |
| Process pressure | Up to 4.0 MPa (PN40) standard; PN63/PN100 available |
| Liner material | PTFE, PFA, rubber, polyurethane |
| Electrode material | 316L SS, Hastelloy B/C, titanium, tantalum, platinum |
| Output signal | 4–20 mA (HART), pulse/frequency, RS-485 Modbus RTU |
| Digital integration | Modbus TCP, BACnet MS/TP, BACnet IP, SNMP (via gateway) |
| Enclosure rating | IP65 (standard), IP68 (submersible option) |
| Power supply | 85–265 VAC, 50/60 Hz; 24 VDC option |
| Approvals | CE, RoHS; ATEX/IECEx Ex d IIC T6 (Ex variant) |
| Measurement principle | Coriolis force / mass-flow direct measurement |
|---|---|
| Pipe size range | DN6 – DN250 |
| Mass flow accuracy | ±0.1% of reading |
| Density accuracy | ±0.001 g/cm³ |
| Process temperature | −50 °C to +200 °C |
| Process pressure | Up to 40 MPa |
| Output | 4–20 mA, pulse, RS-485 Modbus, HART, PROFIBUS DP |
| Media suitability | Dielectric fluids (GRC, EC-100), glycol-water, refrigerants |
Typical deployment points in data center liquid cooling architectures — from facility water through to rack-level manifolds.
Monitors facility water loop flow (primary) and technology cooling system flow (secondary) across coolant distribution units. Critical for PUE measurement and per-rack thermal allocation.
Measures low-flow PG25 / PG30 glycol-water mixtures distributed to cold plate arrays. Coriolis variants handle flow rates from 0.5 L/min up to 200 L/min with sub-1% uncertainty.
Coriolis mass flow meters track dielectric fluid (GRC ElectroSafe, 3M Novec equivalents) circulation in immersion tank loops, unaffected by fluid conductivity.
Compact electromagnetic meters measure per-door chilled-water flow for thermal balancing in retrofitted air-cooled rooms adopting RDHx technology.
Tracks cumulative makeup water consumption on open cooling towers and filtration blowdown lines for water-use reporting and leak detection.
Paired supply/return flow meters with differential comparison logic trigger alarms on imbalance thresholds — the first line of defense for liquid leak detection in white space.
Send us a P&ID or a short description of your cooling loop. Our application engineers respond with a specification recommendation and quote within one business day.
The questions we hear most often from specifying engineers, system integrators, and facility operators.
Electromagnetic meters are the cost-effective choice for conductive fluids (water, water-glycol blends) in primary and secondary facility loops, typically DN50 and above. Coriolis meters are required when you need direct mass flow, when measuring dielectric immersion fluids (which are non-conductive), when accuracy below ±0.2% matters, or when pipe diameters are below DN25. For most CDU deployments on water-glycol, electromagnetic is sufficient and significantly less expensive.
Yes. Both the SUP-LDG electromagnetic and SUP-DMF Coriolis lines are compatible with propylene glycol and ethylene glycol mixtures up to 50% concentration. For electromagnetic meters, ensure the liner material (PTFE standard) is chemically compatible — glycol-water mixtures are non-aggressive and PTFE is suitable across the full temperature range typical of data center loops.
Standard outputs include 4–20 mA analog (with HART overlay), pulse/frequency, and RS-485 Modbus RTU. For Ethernet-native integration we offer Modbus TCP and BACnet IP variants. BACnet MS/TP is available on the RS-485 variant. For SNMP (typical for DCIM platforms), we recommend a protocol gateway rather than embedding SNMP in the meter itself, for better firmware maintainability.
Published accuracy figures (±0.2% for electromagnetic, ±0.1% for Coriolis) are achieved under reference conditions with the recommended 10D upstream / 5D downstream straight-pipe runs. In real installations, common error sources are insufficient straight run, entrained air, and under-filled pipes. We provide application engineering support to review P&IDs before quoting, which typically keeps installed accuracy within 0.3–0.5% of reading for electromagnetic meters.
Yes. Both electromagnetic and Coriolis lines have Ex d IIC T6 Gb versions certified under ATEX and IECEx schemes. These are occasionally specified for battery backup rooms and diesel generator plant rooms adjacent to data center white space.
Standard configurations ship in 3–4 weeks. Each meter is wet-calibrated on an accredited flow loop with calibration certificates traceable to national standards (e.g., NIM in China, which cross-references to NIST and PTB). Third-party calibration reports (e.g., ILAC-MRA accredited lab) are available on request.
Yes, within the rated pressure class. Standard PN40 meters tolerate transient spikes up to approximately 1.4× nominal pressure for short durations. For loops with known high water-hammer exposure, we recommend specifying PN63 or higher and installing upstream surge arrestors — this is particularly relevant for large CDU primary loops with VFD-driven pumps.
Whether you're designing a new liquid-cooled data center or retrofitting existing air-cooled facilities, our engineers can help you select the right instrumentation package.