This results in a sensor that is unaffected by {HEAD ~ damage} at {TAIL ~ outer edges} of the sensor layers 
at
This results in a sensor that is unaffected by { HEAD ~ damage } at { TAIL ~ outer edges } of the sensor layers
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH