If the detection signal is outside the preselected range of air pressure, the controller unit transmits an alert signal to a transmitter means for remote transmission of {HEAD ~ an alarm signal} to {TAIL ~ an alarm} means 
to
If the detection signal is outside the preselected range of air pressure , the controller unit transmits an alert signal to a transmitter means for remote transmission of { HEAD ~ an alarm signal } to { TAIL ~ an alarm } means
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 OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH