Helium Mass Spectrometer Leak Detection in Liquid Cooling Industry – From Principle to Practice!

Background Introduction

With the explosive growth of AI computing power demand, liquid cooling has become a "must-have" solution for heat dissipation in data centers, supercomputing centers, and energy storage systems, with the market growing at over 100% annually. However, micro-leakage—the most hidden and critical pain point in liquid cooling systems—has emerged as a key bottleneck restricting industrial safety and reliability. Traditional water immersion tests or pressure decay tests can only capture macroscopic leaks and are virtually ineffective against trace permeation. Once coolant leaks through microscopic pores and comes into contact with electrical circuits, it can cause short circuits, equipment burnout, or even complete data center shutdown, resulting in losses potentially reaching tens of millions of yuan.

The fundamental advantage of helium mass spectrometer leak testing stems from the exceptionally strong permeability of helium atoms—the smallest and lightest inert gas after hydrogen. This property allows the detection of minute leaks that conventional methods are incapable of finding, achieving sensitivities as high as 10⁻¹² Pa·m³/s. Consequently, it is widely acknowledged as the most dependable leak detection technique available in the industry today.

1.Key Applications of Liquid Cooling

Helium mass spectrometer leak detection covers multiple critical stages of liquid cooling systems, ranging from core components to full system integration.

1.1 Core Component Manufacturing (100% Full Inspection)

• Liquid Cooling Cold Plate: This is the core thermal dissipation component attached to the CPU/GPU, with numerous micro-channels and brazed joints inside. Any micro-leakage will cause cooling failure. Helium leak testing ensures that the leakage rate of the cold plate leaving the factory meets the stringent standard of below 0.001 mL/min.
• Liquid Cooling Manifold and Piping: As the "blood vessels" of the liquid cooling system, these components distribute the coolant. They feature dozens of welded joints, threaded connections, and flange interfaces—each a potential risk point. Helium leak testing can screen each one individually. 
• UQD Quick-Connect Coupling: This is a critical "joint" for server hot-swapping, requiring leak-free connection and disconnection while filled with coolant. Leading suppliers have adopted 100% helium leak testing as their factory standard to detect microscopic defects on sealing surfaces.

1.2  System Integration and Maintenance

Production Line Integration: Following the assembly of complete server or data center racks, helium leak detection is used to conduct sample inspections of the entire liquid cooling circuit, verifying that no new leak points have been created during the installation process.

2. Core Detection Principles: Vacuum (Spray Helium) Method vs. Sniffer Probe Method

Depending on the component geometry and the specific testing environment, two primary approaches are generally adopted:

3. Wayeal’s Advanced Solutions Empower the Liquid Cooling Industry

On April 6, 2026, CCTV Finance's "Economic Information Broadcast" aired a feature series, "Liquid Cooling Industry Rides the Wave," which noted that the liquid cooling sector has become a highly competitive arena where companies are racing to establish their foothold. Wayeal's helium leak testing vacuum chamber system was prominently featured in the report, serving as the "ultimate quality gatekeeper" for sealing integrity testing of critical liquid cooling components, and helping to ensure the safe, large-scale deployment of China's domestic liquid cooling industry.

4. Strategically Aligned with Leading Customers to Safeguard Capacity Growth

As a leading brand in domestic precision leak detection, Wayeal has established deep, strategic partnerships with top-tier liquid cooling customers. The company delivers customized helium vacuum chamber leak detection system and supports full-cycle project delivery:

Project 23169 – Phase 1 (delivered Q4 2023): Enabled customers to secure a first-mover advantage in the liquid cooling market.

Project 24284 – Phase 2 (delivered Q4 2024): Addressed production capacity ramp-up requirements.

Project 25084 – Phase 3 (delivered mid-2025): Supports capacity expansion at the million-unit level.

5. Three Core Advantages: Define a New Standard for Liquid Cooling Leak Detection.

5.1 Ultimate Precision – Zero Hidden Leaks

Detection accuracy reaches 10⁻⁸ Pa·m³/s (Note: Depending on the equipment model, some can achieve the 10⁻¹² Pa·m³/s), enabling precise identification of micro-defects on connector sealing surfaces, as well as on cold plate welds and flow channels.

Eliminates slow permeation and hidden leaks, providing data-level assurance for liquid cooling system sealing integrity, and turning "zero leakage" from a slogan into reality.

5.2 Closed-Loop Helium Recovery – Visible Cost Savings and Efficiency Improvements

• ≥98% helium recovery rate allows for recirculation and reuse, resulting in annual savings of millions of yuan in helium expenses.
• Fully automatic vacuum chamber combined with intelligent controls achieves a cycle time as fast as 3–5 minutes per workpiece, making it suitable for 24/7 continuous production line operation.

5.3 Deep Adaptability – Covering All Application Scenarios

• Custom-designed vacuum chambers and fixtures are perfectly tailored to accommodate a wide range of workpieces, including liquid cooling quick-connect couplings and cold plates.
• Enables MES connectivity and full data traceability , fulfilling the intelligent and standardized production needs of leading customers.

6. The Computing Power Era: Leak Detection Takes the Lead

From R&D to delivery, from stand-alone equipment to complete production lines, Wayeal leverages its proprietary core technologies and end-to-end services to serve as the "quality cornerstone" of the liquid cooling industry chain. The liquid cooling leader featured in CCTV's report is a true adopter of Wayeal's solutions: relying on a high-sensitivity helium mass spectrometer leak detection system capable of pinpointing micron-sized leaks, it secures the "zero leakage" lifeline of computing power infrastructure.

In the era of computing power, liquid cooling reigns supreme; quality is the foundation, and leak detection takes the lead. Wayeal will continue to deepen its presence in the precision leak detection field, delivering hardcore leak testing technologies featuring fast response, high-precision localization, and high background clearance. Together with industry partners, Wayeal is committed to protecting every "zero leakage" computing power promise.

If you are struggling with leak detection challenges in the liquid cooling industry, or are seeking a reliable solution provider for liquid cooling leak detection, contact Wayeal for taloried technical solutions.