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