Buyers must prioritize the light source type (UV, Visible, or Solar simulation) and its irradiance intensity, as these directly dictate the reaction efficiency. For liquid-phase reactions, evaluate the mixing mechanism (magnetic stirring vs. circulation pumps) to ensure uniform catalyst suspension. Additionally, verify the material of the reaction vessel; high-quality reactors typically use borosilicate glass 3.3 or quartz to ensure maximum light transmittance and chemical resistance. For high-pressure applications, ensure the unit features stainless steel 316L reinforcement and integrated pressure relief valves.