A setup for pulse radiolysis experiments is described consisting of the following main components: an array of 15 photomultipliers attached to a spectrograph (allowing 4032 spectra to be recorded with a time resolution of 500 ns per spectrum), self‐regulating high‐voltage supply for the photomultipliers, computer‐controlled solution mixing and dispensing system, and provisions for continuous dose variation of the FEBETRON‐accelerator electron beam. The general performance of the system is discussed and construction or electronic details are given for special components.