IPX7 and IPX8 Testing: How to Investigate Water Ingress in Sealed Enclosures

For engineers developing waterproof products, confirming that an enclosure can withstand immersion is essential. But during product development, knowing whether water has entered is only part of the challenge. Understanding where leakage begins and how a seal or connection behaves during testing can provide valuable information for improving a design. This is where transparent pressure vessels can make a difference, allowing engineers to observe test specimens while controlling the environment around them.

Understanding IPX7 and IPX8 Testing

IPX7 and IPX8 are Ingress Protection (IP) classifications defined under IEC 60529. They relate to protection against the effects of immersion in water. IPX7 covers temporary immersion under specified test conditions. IPX8 covers continuous immersion under conditions agreed between the manufacturer and the user, which are more severe than those required for IPX7. The appropriate test conditions depend on the product and the applicable requirements. Manufacturers must therefore establish the relevant conditions before selecting suitable testing equipment.

For products such as electronic enclosures, marine lighting, sensors, connectors and portable electronics, immersion testing can help assess whether seals, joints and cable entries provide the required protection against water ingress. However, during research and development, engineers may need more than a pass-or-fail result. They may want to understand what happens to the product as the test progresses.

Why Visibility Matters During Water Ingress Testing

Conventional opaque test chambers can provide a controlled environment, but direct observation of the specimen may be limited. A transparent pressure vessel offers a different approach. By allowing engineers to view the specimen during testing, it can help them investigate potential leakage paths and observe changes as test conditions are applied. Depending on the product and the nature of the test, visible indicators may include bubbles around seals or connections, changes in fluid movement or other signs that warrant further investigation. This information can be particularly useful when developing or refining a product. If a potential weakness is identified, engineers can investigate the relevant area and use their findings to inform subsequent design changes. Visual observation does not replace the required test procedure or assessment. Instead, it can complement other inspection methods and help engineering teams better understand the behaviour behind a test result.

Choosing a Pressure Vessel for IPX7 and IPX8 Testing

Selecting a suitable vessel involves more than choosing one that can contain water. Engineers need to consider the specimen dimensions, required test conditions, operating pressure, vessel materials and any additional equipment needed to monitor the process.

SR-TEK’s transparent test vessels are designed for IP-testing applications and provide 360° visibility. Depending on the configuration, they can accommodate positive pressure up to 4 bar and vacuum operation down to −0.8 bar. The vessels are available in clear polycarbonate, acrylic or glass, with configurable ports for instrumentation, sensors and other connections. Standard volumes range from 2 to 10 litres, with larger or higher-specification configurations available on request. These options allow the test vessel to be configured around the application and the equipment being investigated.

It is important, however, to distinguish between a vessel’s operating capabilities and the requirements of the complete test setup. The appropriate configuration must be confirmed against the intended procedure, specimen and required test conditions.

From Pass-or-Fail Testing to Better Product Development

Water ingress testing is not only about determining whether a product meets a requirement. During development, it can also help engineers identify weaknesses and understand how a design responds to demanding conditions. The ability to observe a specimen during testing can provide additional insight into the behaviour of seals, connections and enclosures. Combined with appropriate measurements and post-test inspection, this can support troubleshooting and informed design improvements. For manufacturers and testing laboratories, choosing equipment that provides both a controlled environment and clear visibility can therefore be valuable when investigating water ingress.

Discuss Your Testing Requirements with SR-TEK

SR-TEK designs configurable transparent pressure and vacuum vessels for IP testing, product development and specialist engineering applications. If you are developing a sealed enclosure or investigating water ingress, our team can help you explore a suitable vessel configuration for your testing requirements. Explore our transparent test vessels for IP testing or contact SR-TEK to discuss your application.

For a broader look at how transparent vessels are used across marine and submersion applications, read our article on transparent pressure vessels for marine, submersion and IP testing.