Liquid extraction apparatus

摘要

An apparatus (10) is provided for identifying each of a predetermined plurality of liquid containers (62), some of which are stoppered and others of which are open-mouthed and for extracting liquid therefrom. The apparatus comprises an upper arm (12) and a lower arm (14) and a sensor (38) responsive to relative motion therebetween, relative motion between the arms causing a container identity signal (I) representative to be generated. A single needle (18) is used to penetrate stoppers when present and extract liquid from the container. <MATH>