A sensor is held in a substantially fixed position relative to the insulation to measure {HEAD ~ force} exerted on {TAIL ~ the sensor} by the insulation 
exerted on
A sensor is held in a substantially fixed position relative to the insulation to measure { HEAD ~ force } exerted on { TAIL ~ the sensor } by the insulation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH