In other words, this sensor can be located anywhere in {TAIL ~ the system} downstream of a loading station for {HEAD ~ the pucks} 
In other words , this sensor can be located anywhere in { TAIL ~ the system } downstream of a loading station for { HEAD ~ the pucks }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD