Also the height of the top wall above the conveyor is sufficiently small to accommodate only the environmental sensors, the assay cartridges, and a clearance space between {TAIL ~ the sensors} and {HEAD ~ the cartridges} 
Also the height of the top wall above the conveyor is sufficiently small to accommodate only the environmental sensors , the assay cartridges , and a clearance space between { TAIL ~ the sensors } and { HEAD ~ the cartridges }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD