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