The humidity sensor associated with {HEAD ~ the monitoring} of humidity levels in {TAIL ~ the selected gas component} may then be omitted and a value of the predetermined humidity level provided directly 
in
The humidity sensor associated with { HEAD ~ the monitoring } of humidity levels in { TAIL ~ the selected gas component } may then be omitted and a value of the predetermined humidity level provided directly
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH