UV Accelerated Weathering Tester: Why Industrialists Need It. Success in the manufacturing world is founded today on the ability of material to withstand environmental stresses, where industries are forced toward more durable products than the world has ever known. One can ask how to test the long-term effects ultraviolet exposure would have upon a material in less than the time it would otherwise take in the real environment. The answer lies within the UV Accelerated Weathering Tester.