SYSTEME DE PIPETAGE A DEPLACEMENT POSITIF, PRESENTANT UNE CONCEPTION FACILITANT LA PREHENSION DU PISTON DE L'ENSEMBLE CAPILLAIRE-PISTON

摘要

A pipetting system (100) includes a positive displacement sampling pipette (1) and a capillary-piston assembly (84) having a piston (82) having a top end for holding by a device gripper (20) equipping the pipette, the device (20) comprising a plurality of gripping tongs (26). According to the invention, the system is designed so that when the capillary (80) is fitted on the pipette tip (6) and the gripping device (20) is at a distance from the piston (82) towards the top, this device can be moved downwards with its clamps (26) in an open configuration, to a determined position in which the clamps, arranged around the upper end of the piston (82), automatically switch into a closed configuration in which they ensure a maintenance of the upper end of the piston (82).