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