not shown the rack handler section 12 further comprises drawers 22 24 through which emptied primary racks and or primary racks containing sample tubes with error designations and or racks containing at least one retrieved sample tube can be taken out of the storage retrieval module 10 further the rack handler section 12 comprises a capping station 26 with a feeder tank 28 for tube caps the storage retrieval module 10 also comprises a man machine interface mmi 30 which might have the form of a touch screen monitor 32 at the end of an articulated arm 34 fig2 shows a top view of the rack handler area 210 of the storage retrieval module 10 the rack handler area 210 comprises a platform 212 inside the rack handler section 12 of fig1 it further comprises a first robotic arm 220 which may be installed essentially in the centre of the platform 212 or at least at a position from which it can reach at least all locations within the rack handler area 210 any known suitable robot can be used for this purpose preferably a scara robot with four axes and four degrees of freedom is employed the robotic arm 220 comprises at its end a gripper 222 designed to securely grip the racks to be handled on the platform 212 a conveyor 214 is provided for conveying incoming primary racks pr containing sample tubes e g five sample tubes to an image analysing unit 250 which is also positioned on the platform 212 as shown.