{TAIL ~ The device} includes 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 
{ TAIL ~ The device } includes 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
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH 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