Working Principle of the Magnetostrictive Products KunLun Magnetostictive Probe is dosigned based on magnitostrictive principle.  Measuring principle an inquiring pulse is sent at every measuring cycle,  which travels down the waveguide and the phenomenon of physical expansion and contraction(twisting)will be produced at the magnetzed aroa,and t will form an echo which traves up the wavegude.  Tha time from sending thenquiring pulse to rocening the returning pulse is the accurate measuring of liquid level.