More specifically, the present invention drives {HEAD ~ a wide range electrochemical polarographic oxygen sensor} under a drive voltage designed to maintain the sensor in {TAIL ~ the current limiting range} of operation 
More specifically , the present invention drives { HEAD ~ a wide range electrochemical polarographic oxygen sensor } under a drive voltage designed to maintain the sensor in { TAIL ~ the current limiting range } of operation
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH