An assembly of devices designed to automatically pipette liquids in the laboratory for the preparation/concentration of analytes (e.g., cells, nucleic acids, microorganisms) in clinical specimens (e.g., blood, urine, sputum, faeces). It is software operated and automatically moves liquids by pipetting, and typically by mixing, heating, and magnetic particle handling. It typically includes a mains electricity (AC-powered) pipetting system, a heating module, shaker, bar-code reader (for specimen traceability), adaptors, grippers, and sample racks. The system is commonly used with specialized kits for the extraction/isolation/concentration of analytes.