An automatic liquid sampler for high-performance liquid chromatography is described. The sampler is based on a GC-injection system from Hewlett-Packard. The HPLC sampler has a unique cleaning system, excellent reproducibility and a plug-in compatibility for sample identification and computer control for Hewlett-Packard integrators and Laboratory Data Systems. © 1979 Friedr. Vieweg & Sohn Verlagsgesellschaft mbH.