The sensor 19 wherein said nonconductive organic polymer in one of {TAIL ~ said chemically sensitive resistor} in said array is different from {HEAD ~ said nonconductive organic polymer} in at least one other chemically sensitive resistor in said array 
The sensor 19 wherein said nonconductive organic polymer in one of { TAIL ~ said chemically sensitive resistor } in said array is different from { HEAD ~ said nonconductive organic polymer } in at least one other chemically sensitive resistor in said array
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH