Dispensing unit

A liquid handling unit including:

• a sample unit (5) with at least one carrier (560;580;590) for laboratory containers (561;581;591),
• at least one liquid transfer unit (3,4;6) for dispensing liquid into at least some of the laboratory containers (561;581;591) and/or for extracting liquid from the laboratory containers (561;581;591), the at least one liquid transfer unit (3,4;6) being arranged above the sample unit (5) and having a holder (41;61) for dispensing means (43;63,65) and/or extracting means (63,65) that can be raised and lowered,
• at least one positioning pin (46,47;66,67) is arranged on the holder (41;61) and at least one positioning hole (54,55) is formed in the carrier (560;580;590),
• wherein when the holder (41;
• 61) is raised, the carrier (560;580;590) passes freely below the at least one positioning pin (46,47;66,67) in a horizontal direction and wherein when the holder (41;61) is lowered, the at least one positioning pin (46,47;66,67) can be arranged fittingly in the at least one positioning hole (54,55).