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