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