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