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