Products are tested in a humidity chamber to verify the integrity and dimensional stability of their constituent materials. Many materials, such as plastics, woods, composites, and textiles, are hygroscopic, meaning they absorb moisture from the air. When this happens, they can swell, warp, or change their physical properties. For example, a wooden door must not warp in humid summers, and a plastic component in a precision instrument must not expand and cause malfunction. By placing these materials inside a humidity chamber, manufacturers can simulate years of exposure to humid conditions in a matter of days or weeks, confirming that the materials will maintain their shape, size, and functionality throughout the product’s intended lifespan.
