The requirement for the evaluation of different materials with diverse composition, configuration and shapes has led to the design, construction and test of a large number of reactors as: tubular, flat or cylindrical with or without concentration. These designs have to work with real solar radiation or using different wavelength lamps, trying always to simulate outdoor and indoor environmental conditions. The results of this work have led to the Unit original designs and some of them have been patented: "Annular Hybrid photoreactor for supported photocatalyst" (ES2371621B1) and others have resulted in utilities models: "Efficiency photocatalytic test system" (ES1087480U).