The resistor provides {HEAD ~ a difference} in {TAIL ~ resistance} between the conductive elements when contacted with a fluid comprising a chemical analyte at a first concentration, than when contacted with a fluid comprising the chemical analyte at a second different concentration 
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The resistor provides { HEAD ~ a difference } in { TAIL ~ resistance } between the conductive elements when contacted with a fluid comprising a chemical analyte at a first concentration , than when contacted with a fluid comprising the chemical analyte at a second different concentration
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH