A processor, connected to each of the pressure sensors, sorts {HEAD ~ a relative difference} between {TAIL ~ signals} of the sensors during dust filling 
between
A processor , connected to each of the pressure sensors , sorts { HEAD ~ a relative difference } between { TAIL ~ signals } of the sensors during dust filling
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 OTH OTH OTH OTH OTH OTH