The built photoreactor should be assembled in a closed box to avoid light exposure to the environment and meet the requirements of safe operation. Stainless steel plate is a suitable, readily available and economical material for constructing photoreactors. In order to properly cover all components in the photoreactor, the following metal plate should be prepared: One should note that all these sheet metal parameters should correspond to the dimensions of the electronic components used. Once the metal plates were ready, the next step is to print some useful components for installing built-in magnetic stirring system and fixing the test tubes. 3D printing is a useful tool for generating bespoke designs. Therefore, it is possible to print simple scaffolds of arbitrary shapes in this photoreactor.