wherein {HEAD ~ the disposable sensing element} is connected to {TAIL ~ a plurality} of similar elements to form a stack, and 
is connected to
wherein { HEAD ~ the disposable sensing element } is connected to { TAIL ~ a plurality } of similar elements to form a stack , and
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH