The ozone aging test chamber standard GB/T 13642-1992 does not specify a particular humidity level because 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 device. As the air is exhausted, the relative humidity drops significantly. The higher the internal temperature, the lower the humidity becomes, often resulting in a relative humidity below 65%. This can affect the accuracy and reliability of the test results, as shown in the table below. If you need to evaluate the ozone resistance of materials under humid conditions, a specialized ozone aging chamber with humidity control is required. The GB/T 13642-1992 standard provides general guidelines, but it only sets an upper limit of 65% for humidity. For more accurate and controlled testing in humid environments, additional equipment or modifications may be necessary. In practice, many users rely on this standard for general applications, but for specific research or industrial requirements, a controlled humidity environment is essential. This ensures that the test conditions are consistent and representative of real-world scenarios where humidity plays a significant role in material degradation. Below are some visual references showing the typical requirements for humidity in ozone aging test chambers. These images provide a clearer understanding of how humidity affects the test process and why it's important to manage it properly.  

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