What Is Differential Pressure?_
In liquid cooling systems, differential pressure sensors monitor the pressure drop across components like cold plates, heat exchangers, or filters. A higher-than-expected differential can signal blockages, kinked hoses, or failing pumps, while a low reading may indicate a leak or pump failure. This metric is critical for verifying coolant flow meets thermal design requirements.
Technical Details
Differential pressure is typically measured in inches of water column (inH2O) or pascals (Pa) using a transducer with two ports connected to the loop. The sensor outputs an analog or digital signal to the facility monitoring system, with thresholds set per the OEM spec for each GPU node or rack. In a typical high-density rack, differential pressure across the GPU cold plates must stay within a specified range to ensure uniform cooling across all GPUs. Field crews verify these readings during commissioning to confirm the loop is free of air and debris.
How Leviathan Systems Works with Differential Pressure
During rack assembly and liquid cooling commissioning, we install differential pressure sensors at key points—across the rack manifold and each GPU tray—and log baseline values. A sudden deviation during burn-in testing often points to a loose fitting or a clogged filter, requiring immediate rework.
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