ISO 10820:2025

This document specifies the irradiation equipment using ultraviolet light emitting diode (UV-LED) and optical radiometry for testing the performance of semiconducting photocatalytic materials. The UV-LED irradiation equipment specified in this document uses UV-LED having a peak wavelength of 365 nm in the UV-A range and is for a semiconductor photocatalyst that exhibits a photocatalytic function at this wavelength. This document is applied to the irradiation equipment using UV-LED only. ISO 10677 is applied to the equipment using conventional UV light sources such as fluorescent lamps.