The heating elements are pulsed by an electrical circuit at a rate substantially faster than {HEAD ~ the rate} of {TAIL ~ introduction} of new assay cartridges 
of
The heating elements are pulsed by an electrical circuit at a rate substantially faster than { HEAD ~ the rate } of { TAIL ~ introduction } of new assay cartridges
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH