The measuring apparatus further has at least one position sensor to determine {TAIL ~ the position} of the magnetic sample , an electromagnet to exert a magnetic force on {HEAD ~ the magnetic sample} , and a control device for the electromagnet which is connected signal wise to the position sensor  
The measuring apparatus further has at least one position sensor to determine { TAIL ~ the position } of the magnetic sample , an electromagnet to exert a magnetic force on { HEAD ~ the magnetic sample } , and a control device for the electromagnet which is connected signal wise to the position sensor
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH