In {TAIL ~ such an apparatus}, {HEAD ~ the resistor/sensor} is held in an Al chassis box to shield them from external electronic noise 
In
In { TAIL ~ such an apparatus } , { HEAD ~ the resistor / sensor } is held in an Al chassis box to shield them from external electronic noise
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH