a switch including a sensing arm engageable with a second side of said membrane to be displaced in {HEAD ~ response} to {TAIL ~ pressure induced deflection} of a contact region of said membrane contacted by said sensing arm; and 
to
a switch including a sensing arm engageable with a second side of said membrane to be displaced in { HEAD ~ response } to { TAIL ~ pressure induced deflection } of a contact region of said membrane contacted by said sensing arm ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH