{HEAD ~ A temperature controlled chamber} for an analytical instrument which includes {TAIL ~ a circular conveyor} for transporting assay cartridges, the chamber enclosing the outer peripheral part of the conveyor on which the assay cartridges reside 
{ HEAD ~ A temperature controlled chamber } for an analytical instrument which includes { TAIL ~ a circular conveyor } for transporting assay cartridges , the chamber enclosing the outer peripheral part of the conveyor on which the assay cartridges reside
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