This paper describes the principle of operation and the technical characteristics of the “Gelios” atomic-absorption spectrometer with a graphite-atomizer. As a pulsed resonance radiation source, hollow-cathode lamps are used. Nonselective noise compensation is performed by a DDS-30 deuterium corrector operating in the pulsed mode as well. The detection limit varies from 10−6 to 10−8 and depends on the elements being investigated. The reproducibility is 2–3%. The spectral range is 200–700 nm. The minimum resolvable spectral interval is 0.5 nm.