{HEAD ~ The other end} of {TAIL ~ the pin} carries a permanent magnet in axially alignment with the sensor  
{ HEAD ~ The other end } of { TAIL ~ the pin } carries a permanent magnet in axially alignment with the sensor
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH