Also {HEAD ~ 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 the cartridges 
Also { HEAD ~ 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 the cartridges
OTH HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH