DCX Liquid Cooling Systems has added coolant chemistry monitoring and automated treatment to its Facility Distribution Unit (FDU) product family, targeting hall-scale liquid-cooling loops used in high-density AI deployments. The company puts the coolant quality controls inside the same frame as the pumps and controls, aiming to keep coolant loops within specification between scheduled service visits.
The FDU continuously monitors coolant conditions and automatically corrects chemistry drift using integrated electronic dosing pumps. DCX lists eight coolant parameters under continuous monitoring and says the dosing system can supply inhibitors, biocides, and pH control additives to maintain loop conditions without waiting for lab results and follow-up corrective actions.
For operators running MW-class CDUs that serve an entire AI data hall, coolant management shifts from routine maintenance to an availability risk: chemistry drift can reduce thermal performance over time and accelerate corrosion or biofouling if it goes undetected. Building monitoring and dosing directly into the distribution unit is a practical move because it shortens detection-to-correction time and reduces dependence on periodic sampling workflows.
DCX says inline sensors measure turbidity, conductivity, pH, glycol concentration, and corrosion rate. Three automatic dosing channels deliver inhibitor, pH additive, and biocide, with dosing events counted and logged. The controller holds pH at a set point and treats fresh make-up fluid in proportion to its volume. Operators interact with the system through the FDU touchscreen, including a status view and a live diagram of both cooling loops with pumps, valves, and dosing lines. The system supports both PG25 and deionized-water loops.
On the thermal and hydraulic side, DCX rates the FDU family for up to 8 MW of heat transfer capacity at a 2 °C approach temperature and 45 °C supply (ASHRAE W45/W+). Maximum flow is listed at 3000 GPM (11,000 LPM). The unit uses four pumps and supports either N+N or N+1 configurations.
“At this scale, the coolant is as critical as the pumps,” said Maciek Szadkowski, CTO of DCX Liquid Cooling Systems. “With this new feature, we resolve the most challenging risk in liquid cooling-long-term quality assurance of the cooling medium.”
DCX says built-in coolant quality control and treatment is standard across the FDU family and is available immediately for hyperscale and high-density AI projects.
Source: DCX Liquid Cooling Systems
