The ozone aging test chamber standard GB/T 13642-1992 does not specify a particular humidity level for testing, as atmospheric humidity is constantly changing. When air with a certain moisture content enters the ozone aging chamber, it is heated by the internal temperature of the chamber. Due to the exhaust system, the relative humidity inside the chamber drops significantly. The higher the temperature inside the chamber, the lower the humidity becomes, often resulting in a relative humidity below 65%. The test results are summarized in the table provided. If you need to evaluate the ozone resistance of materials under humid conditions, a specialized device with humidity control capabilities is required. The GB/T 13642-1992 standard is designed for general-purpose testing and sets an upper limit of 65% relative humidity. However, for more specific or demanding applications, additional equipment may be necessary to ensure accurate and reliable results. In practice, many users have found that maintaining consistent humidity levels during ozone aging tests can be challenging without proper controls. This is especially important when testing materials that are expected to perform in real-world environments where humidity varies. Therefore, it's crucial to understand the limitations of the standard test chamber and consider upgrading to a more advanced model if needed. The images below illustrate the typical requirements and challenges associated with controlling humidity during ozone aging tests. They provide visual insights into how humidity affects the testing process and why it’s essential to manage it properly for accurate outcomes.

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