The moisture sensors 60 are connected to {HEAD ~ a controller} 62, which monitors the moisture content in {TAIL ~ the atmosphere} 
The moisture sensors 60 are connected to { HEAD ~ a controller } 62 , which monitors the moisture content in { TAIL ~ the atmosphere }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL