UV weathering tester, is a type of testing equipment used to simulate the effects of prolonged exposure to ultraviolet (UV) light on various materials. This type of testing is particularly important in the plastics, coatings, and textiles industries, where the materials need to maintain their integrity and functionality after prolonged exposure to UV light. The results of UV accelerated testing are used to determine the material's resistance to UV light and to identify any degradation that may occur over time. This information is then used to improve the material's design and manufacturing process, to ensure that it will perform as intended even after prolonged exposure to UV light.

The QUV accelerated weathering tester reproduces the damage caused by sunlight, rain and dew. In a few days or weeks, the QUV UV tester can reproduce the damage that occurs over months or years outdoors. To simulate outdoor weathering, the QUV accelerated tester exposes materials to alternating cycles of UV light and moisture at controlled, elevated temperatures. It simulates the effects of natural sunlight and artificial irradiance using special fluorescent UV lamps in the UVA, UVB, and UVC portions of the spectrum. It simulates dew and rain with condensing humidity and/or water spray.

The QUV accelerated weathering tester is the simplest, most reliable, and easiest to use weathering tester available. With thousands of testers in use worldwide, it is the world's most widely used weathering tester.