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Efficient Cooling Solutions for Data Centers

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Flow Measurement for CDUs and Rack Cooling – Reliable and Safe Liquid Cooling for Data Centers

Data centers are the heartbeat of the digital world. They process massive amounts of data, power AI applications, and drive cloud innovation. However, as computing power increases, so do the challenges: efficient cooling is essential to prevent performance failures, overheating, and unnecessary energy costs.

Conventional air cooling systems are reaching their limits. Liquid cooling is emerging as the superior alternative – especially in Cooling Distribution Units (CDUs) and in-rack cooling systems. Precise flow measurement plays a pivotal role in data center cooling by ensuring the even distribution of coolant, preventing heat buildup, and boosting energy efficiency. Compared to traditional air cooling, liquid cooling provides higher efficiency and enhanced control over thermal processes.

Key Challenges and Solutions in Data Center Cooling

Modern data centers operate powerful AI servers with high computing power that generate enormous amounts of heat. The cooling circuits must be precisely controlled to ensure smooth operation.

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Long-Term Investment Security - High-quality components reduce maintenance costs and ensure a reliable 24/7 operation.

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Leak Prevention - The combination of water and electricity can be critical. Effective sealing is essential, particularly in modular cooling systems designed for data centers.

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Enhanced Energy Efficiency - Operators must optimize Power Usage Effectiveness (PUE) and comply with regulatory requirements such as ASHRAE standards for data center cooling.

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Precise Flow Regulation - Cold water flows must be accurately matched to the cooling performance to guarantee even heat dissipation in high-performance IT environments.

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Prevention of Emergency Shutdowns - Server failures can result in high costs and data loss, making reliable cooling systems indispensable.

SIKA Flow Measurement – Precision Cooling for CDUs & Rack Systems

The choice of the right sensor is crucial. SIKA vortex flow sensors offer precise and dependable coolant dosing in both CDUs and rack cooling systems. Their robust design effectively prevents leaks and ensures maximum operational safety. Engineered for continuous 24/7 operation, these sensors are exceptionally durable and require minimal maintenance — even under extreme conditions.

With superior measurement accuracy, SIKA sensors ensure exact control of flow rates, significantly enhancing cooling performance in data centers.

Available in a wide range of nominal sizes from DN15 to DN40 and offered in both stainless steel and plastic, these sensors can be flexibly integrated into various liquid cooling systems for server rooms.

Digital connectivity via IO-Link enables smart monitoring and improved energy efficiency. This precise control of coolant flow not only optimizes performance but also reduces energy consumption, helping operators lower overall costs.

  1. Flow Measurement

    • High measurement accuracy –
        ±1 % precision
    • Measures flow and temperature
    • No moving parts

  2. Robust Stainless Steel Construction

    • Stainless steel 1.4581
        – resistant to coolant media
    • DN15–DN25 – flexible integration
    • IP65/IP67 – high ingress
       protection rating

  3. Digital Communication

    • IO-Link and analog signals
    • Fast temperature measurement
        – t₉₀ in only 3 s
    • Frequency, analog, and
        digital interfaces

  4. Ideal for in-rack cooling

    • Precise flow measurement
        for efficient cooling
    • Reliable heat removal
        to prevent overheating
    • Durable and maintenance-free
        – 24/7 operation
    • Resistant to coolant media
        such as deionized water
    • Smart control via IO-Link

  1. Flow Measurement

    • High measurement accuracy –
        ±1 % precision
    • Measures flow and temperature
    • No moving parts

  2. Robust Stainless Steel Construction

    • Stainless steel 1.4581
        – resistant to coolant media
    • DN15–DN25 – flexible integration
    • IP65/IP67 – high ingress
       protection rating

  3. Digital Communication

    • IO-Link and analog signals
    • Fast temperature measurement
        – t₉₀ in only 3 s
    • Frequency, analog, and
        digital interfaces

  4. Ideal for in-rack cooling

    • Precise flow measurement
        for efficient cooling
    • Reliable heat removal
        to prevent overheating
    • Durable and maintenance-free
        – 24/7 operation
    • Resistant to coolant media
        such as deionized water
    • Smart control via IO-Link

Why Vortex Flow Measurement is Superior in Data Centers

Every cooling application comes with unique requirements for flow measurement, and not every sensor technology is equally suited for data center environments. In these demanding settings, precise, long-term stable, and maintenance-free solutions are essential. Vortex flow sensors deliver critical advantages: they provide reliable measurements independent of the medium’s electrical conductivity and ensure the highest precision even at low flow rates.

Especially in closed-loop liquid cooling systems using deionized water, vortex sensors excel thanks to their resistance to aggressive cooling media and their flawless, wear-free operation. These qualities make them the ideal choice for continuous use in CDUs and rack cooling systems, where uniform, disruption-free heat dissipation is vital for the safe operation of high-performance IT systems.

Tailored SIKA Solutions for Liquid Cooling in Data Centers

Every data center presents specific challenges for its cooling infrastructure, and standard solutions often fall short. This is where SIKA steps in. With a strong focus on co-engineering, SIKA develops customizedflow measurement solutions that perfectly match each customer's unique requirements.

Backed by proven series quality, SIKA guarantees 100% traceability and the highest manufacturing standards to ensure consistently reliable performance. Customers benefit from direct technical support—from the initial concept development through to seamless integration.

Additionally, precise flow regulation for chiller systems plays an essential role in achieving accurate temperature control in modern data center cooling setups, ensuring energy efficiency and uninterrupted operation.

Vortex Flow Sensors

DN25...DN40 // Stainless Steel Version
with Tri-clamp connection

Modular integration via Tri-Clamp - ideal for flexible cooling applications. Without moving parts, without medium contact. Robust stainless steel housing, durable & maintenance-free in 24/7 operation.

View VVX25-32-40

Vortex Flow Sensors

DN15...DN25 // Stainless Steel Version

Precise flow and temperature measurement for CDUs & rack cooling systems. Robust stainless steel (1.4404), resistant to cooling media. IO-Link for smart monitoring, ideal for 24/7 operation.

View VVX15-20-25

Vortex Flow Sensors

DN32...DN40 // Stainless Steel Version

Designed for high flow rates in powerful cooling systems. Featuring a robust stainless steel housing engineered for demanding media, these sensors deliver exceptional measurement accuracy. Equipped with IO-Link connectivity, they ensure seamless integration into digital monitoring systems.

View VVX32-40

Vortex flow sensor VVX15

Vortex Flow Sensors

DN15...DN25 // Plastic Version

Lightweight and media-resistant – ideal for glycol-water mixtures. Enjoy precise flow and temperature measurement with a maintenance-free design for continuous operation. IO-Link ensures smart integration into modern cooling systems.

View VVX IO-Link