The perturbations are sufficiently small so as to not drive the sensor out of {TAIL ~ the current limiting range} of {HEAD ~ operation} 
The perturbations are sufficiently small so as to not drive the sensor out of { TAIL ~ the current limiting range } of { HEAD ~ operation }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD