The output signals from transducer are then used by {HEAD ~ data processing unit} to compute the concentrations of propane, n butane gases and {TAIL ~ C5 + gases} in the sample 
The output signals from transducer are then used by { HEAD ~ data processing unit } to compute the concentrations of propane , n butane gases and { TAIL ~ C5 + gases } in the sample
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH