Abstract: An automated clinical analyzer comprises an upper carousel operable to rotate about a central axis and a lower carousel operable to rotate about the same central axis. The upper carousel includes a first plurality of seats operable to receive a first plurality of reagent cartridges. The lower carousel includes a second plurality of seats operable to receive a second plurality of reagent cartridges. The analyzer further comprises a reagent probe assembly including a probe tip. The reagent probe assembly is operable to move the probe tip between the upper carousel and the lower carousel and extract liquid reagents from the first plurality of reagent cartridges and the second plurality of reagent cartridges. The upper carousel includes an opening that allows the probe to extend through the opening and reach cartridges located on the lower carousel.