{HEAD ~ A device} to detect the location of a plurality of magnets uses {TAIL ~ a plurality} of magnetic sensors, having sensor elements arranged in a known fashion 
uses
{ HEAD ~ A device } to detect the location of a plurality of magnets uses { TAIL ~ a plurality } of magnetic sensors , having sensor elements arranged in a known fashion
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH