Helium Leak Testing by VES

World-renowned expertise. Over 1,600 systems deployed globally.

Precision Helium Leak Testing for Automotive, HVAC and Clean Energy Sectors

Welcome to VES Helium Leak Testing

Global Leaders in Precision Helium Leak Detection Systems.

With over 1,600 systems installed worldwide, We are a trusted leader in advanced design and manufacturing of leak detection systems. From vacuum chamber and accumulation to sniff and spray testing, our helium-based technologies deliver unmatched accuracy, repeatability, and reliability, trusted by industries from automotive to medical.

We offer fully bespoke helium leak testing systems as well asOptVol—a compact, all-in-one system that’s 9% faster than traditional setups and cuts operational costs by up to 65%, and Accuro, a vacuum-free system that detects leaks down to 1.0e-03 mbarL/s without being affected by temperature changes. Backed by our high-performance Helium Leak Detection Machine, we can provide smart, scalable solutions built for real-world production demands.

helium-leak-testing-machine

Custom Leak Detection

Engineered for precision and reliability, our Custom Helium Leak Testing Machines deliver outstanding sensitivity, repeatability, and durability

optvol-helium-leak-testing

OptVol Leak Detection

OptVol is a compact, all-in-one helium leak testing solution. Capable of detecting leaks as small as 5.0e-06 mbarL/s,

Accuro Leak Testing

Accuro is a high-performance mass spectrometry leak testing system designed to work without a vacuum setup.

Comprehensive Helium Leak Testing Systems

Explore our range of advanced helium testing solutions, from high-sensitivity vacuum chambers to cost-effective accumulation systems designed to meet the strictest industry standards.

Whether you’re leak testing fuel tanks, HVAC parts, or medical devices, our technologies include hard vacuum systems, cost-effective accumulation testing, pinpoint sniff detection, and strategic spray methods. Each tailored for precision and reliability.

Helium Leak Detection
Leak Testing Methodologies

Cost-effective and chamber-free, accumulation testing uses helium as a tracer gas under atmospheric pressure. Ideal for detecting medium-to-small leaks with repeatable accuracy, it’s a perfect upgrade from air-under-water and pressure decay methods.

Leak Rate Definition
Unit Conversion Tables

Best for large or complex parts, sniff testing locates helium leaks directly using a handheld or robot arm-held probe. It’s ideal when pinpointing and repairing leaks is essential — especially when full chamber testing isn’t practical.

Laws of Ideal Gas
OptVol Leak Detection

Designed for evacuated parts, helium spray testing strategically exposes components to helium to detect areas of potential ingress. A reliable choice for parts requiring absolute barrier integrity under vacuum conditions.

Leak Testing Brochure
Leak Testing Videos

Join Over 1,600 Satisfied Customers

Engineered Testing Confidence – from concept to production.

Frequently Asked Questions

Find quick answers to common questions about our helium leak testing systems, methods, and applications.

Helium is an ideal tracer gas due to its small atomic size, inert properties, and low natural atmospheric concentration (approx. 5.2 ppm). These characteristics allow for highly sensitive, quantifiable, and repeatable leak detection with minimal environmental impact.

HVAC systems must maintain airtight seals for refrigerant efficiency, safety, and environmental compliance. Helium testing allows for early detection of micro-leaks that could otherwise lead to performance loss or costly refrigerant loss over time.

Helium leak detection systems can identify leak rates as low as 1.0×10⁻⁸ mbar∙l/s, significantly outperforming pressure decay or bubble test methods. This makes them suitable for components where even the tiniest leaks can compromise safety or performance.

This depends on the component type and production volume. Common methods include:

  • Vacuum chamber testing – best for high sensitivity and automation.
  • Helium sniffing – ideal for pinpointing leak locations manually.

Helium accumulation – cost-effective when vacuum chambers aren’t feasible.

While helium gas can be costly, systems like VES PURE allow for recovery and purification of helium with >99% purity, drastically reducing long-term costs. PURE offers ROI in as little as 1.6 years depending on usage volume.

Yes. VES systems support manual to fully automated setups. They can operate as standalone units or be integrated inline with production lines—up to 100 parts/min depending on design.

Absolutely. Helium leak testing:

  • Reduces waste and rework
  • Supports type-approval for clean mobility (especially hydrogen and EVs)

Offers low carbon footprint solutions like the OptVol system

Leak rate thresholds vary by part and safety standard. For example, fuel tanks or battery housings may require <10⁻⁶ mbar∙l/s, while HVAC might allow higher. VES can help define these values based on application and legislation.

Leak rate is calculated using:

Q = (Δp × V) / Δt,
 where Δp is pressure difference, V is volume, and Δt is time. SI units express leak rate in mbar·l/s.

Yes. Conversion tables exist for:

  • mbar·l/s to cc/min or atm·cc/sec

pressure and volume units
 These help standardise specifications across global teams and suppliers.

Absolutely. F-Gas regulations in Europe and EPA rules in the U.S. require leak-tight systems to minimise greenhouse gas emissions. Helium leak detection helps manufacturers demonstrate compliance and avoid penalties.

Speak to a Helium Leak Testing Specialist

Get personalised guidance for your leak testing challenges.


    VES Leak Detection Systems designed, manufactured and commissioned for leak testing hydrogen pressure vessels

    Customers

    Daikin Air Intelligence
    Mitsubishi Electric
    Marelli
    Plastic Omnium