The device includes {TAIL ~ a first sensor} located in a region of {HEAD ~ influence} of the actuator and a second sensor located outside but near to the region of influence of the actuator 
The device includes { TAIL ~ a first sensor } located in a region of { HEAD ~ influence } of the actuator and a second sensor located outside but near to the region of influence of the actuator
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH