Driven by the surging demand for AI computing power, liquid cooling has emerged as a mainstream solution for intelligent computing centers thanks to its outstanding heat dissipation efficiency and low energy consumption. As a core component in liquid cooling systems, the Coolant Distribution Unit (CDU) undertakes critical tasks including coolant circulation, heat exchange and flow regulation, acting as a vital hub connecting the cold source side and the server side. Its operating status directly determines the overall heat dissipation performance, stability and reliability of the entire liquid cooling system.
Part 01 Key Monitoring Parameters of CDU
Abnormal pressure, insufficient flow, temperature fluctuations, declining liquid level and degraded water quality will all lead to performance degradation or even equipment failures. Therefore, continuous monitoring of CDU’s key parameters has become an essential part of the construction and operation & maintenance of liquid cooling systems.
| Parameter | Measuring Point | Monitoring Purpose |
|---|---|---|
| Inlet Pressure | Inlet pipelines of the primary and secondary sides | Monitor the stability of water supply pressure and identify potential blockage or leakage risks |
| Outlet Pressure | Return pipelines of the primary and secondary sides | Track return water pressure, calculate system pressure drop and evaluate real-time changes in system resistance |
| Inlet Temperature | Inlet pipelines of the primary and secondary sides | Precisely detect the temperature of coolant entering the CDU, serving as a key indicator to assess the performance of upstream refrigeration units |
| Outlet Temperature | Return pipelines of the primary and secondary sides | Measure outlet temperature, calculate total heat exchange capacity and evaluate the overall heat dissipation efficiency of the CDU |
| Coolant Flow | Main circulation pipelines of the CDU | Monitor the total circulating coolant volume to guarantee long-term compliance with the designed heat dissipation requirements of equipment |
| Coolant Level | Expansion tank / Liquid storage tank | Track the total coolant in the system in real time to prevent hazards caused by excessively low liquid level due to leakage or overfilling |
| Water Quality (Conductivity) | CDU water tank or main pipelines | Detect the conductivity of coolant to identify impurity contamination or chemical changes, and maintain the cleanliness of the system |
Part 02 MEOKON’s CDU Monitoring Solution
Tailored to the operational requirements of CDU equipment, MEOKON has built a comprehensive terminal sensing solution for liquid cooling systems, covering pressure, temperature, flow, liquid level and water quality monitoring. It realizes real-time data collection, remote transmission and centralized management of key operating parameters.
Core Advantages
High Compatibility: Adopts the unified RS485 interface standard to support access to various industrial sensors.
Edge Intelligence: The industrial gateway features offline data resumption to ensure zero data loss.
Security & Compliance: Supports private deployment to fully protect data assets and privacy.
Featured Monitoring Devices
MD-S121 Industrial Pressure TransmitterEquipped with an industrial explosion-proof enclosure and IP67 high protection rating, it delivers strong resistance to strong electromagnetic interference on site.
MD-S322 Digital Display Temperature TransmitterAdopts an explosion-proof cast aluminum housing with a built-in LCD display. The probe length can be customized flexibly according to actual working conditions.
Mass Flow MeterIt tracks real-time changes in coolant flow to ensure on-demand cold energy delivery and promptly detect anomalies such as pipeline blockage and fluid leakage.
MD-S401 Submersible Level TransmitterBased on the high-precision hydrostatic measurement principle, it features an IP68 fully sealed structure. It can operate stably for a long time in harsh fully submerged environments.
MD-S953 Water Quality SensorWith high integration, it feeds back water cleanliness in real time and can trigger early warnings for water quality deterioration or leakage risks, safeguarding the safe operation of equipment.
Conclusion
The stable operation of liquid cooling systems relies not only on core equipment such as cold plates, CDUs and heat exchangers, but also on continuous perception of key operating parameters. With a full range of sensing terminals for pressure, temperature, flow, liquid level and water quality, MEOKON provides a complete set of monitoring equipment and supporting solutions for liquid cooling systems in data centers. We offer full-process support ranging from equipment operation monitoring to anomaly early warning management, helping intelligent computing centers build safer, more efficient and more reliable liquid cooling infrastructure.
Post time: Jun-08-2026