The sensing element or {HEAD ~ sensor} can be calibrated for {TAIL ~ a specific user} or a group of users 
calibrated for
The sensing element or { HEAD ~ sensor } can be calibrated for { TAIL ~ a specific user } or a group of users
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH