{TAIL ~ The sulfur oxide monitoring device} 62 sends a signal to controller 64 wherein this signal is compared to a set point signal 66, which in {HEAD ~ this case} would represent a preselected sulfur oxide emission level known to be below that required by local air pollution regulations 
{ TAIL ~ The sulfur oxide monitoring device } 62 sends a signal to controller 64 wherein this signal is compared to a set point signal 66 , which in { HEAD ~ this case } would represent a preselected sulfur oxide emission level known to be below that required by local air pollution regulations
TAIL TAIL TAIL TAIL 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 HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH