A method and apparatus for processing a sample is presented. The apparatus comprises a chamber, a first input for inputting a first vessel into the chamber, a second input for inputting a second vessel into the chamber, the second input is different from the first input, a rotor comprising a first compartment for receiving the first vessel and a second compartment for receiving the second vessel, a gripper to grip the first vessel and to transport the first vessel to the first compartment, and a pipettor to pipette a sample from the first vessel and/or second vessel. The rotor rotates between a first position where the first vessel is transportable to the first compartment by the gripper, a second position where the second vessel is loadable into the second compartment, and a third position where the sample of the first vessel and/or second vessel is aspiratable by the pipettor.