Typically it is a cyclic weatherometer which is a device used to evaluate the outdoor durability or life of materials under accelerated conditions. The test is accelerated by exposure to UV radiation and moisture. One of the most popular is a Q-Panel QUV cyclic weatherometer; manufactured by Q-Lab. Take a look at www.q-lab.com for details.
what is whether o meter, how it works
Re: what is whether o meter, how it works
