providing a sensor in a substantially fixed position relative to the insulation in the cavity, wherein {HEAD ~ the sensor} is {TAIL ~ an air cup} that is pressed against the insulation 
is
providing a sensor in a substantially fixed position relative to the insulation in the cavity , wherein { HEAD ~ the sensor } is { TAIL ~ an air cup } that is pressed against the insulation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH