Indicator includes source of magnetic field placed between the first pair of ferro-sensitive elements output windings of which are connected by differential circuit, second pair of ferro-sensitive elements output windings of which are connected by differential circuit as well, at that both pairs of ferro-sensitive elements are placed one with respect to another at distance that is equal to half of length of source of magnetic field, and the ends of the output windings of ferrosensitive elements placed at one side of the source of magnetic field are combined, and it includes as well the third and fourth pairs of ferro-sensitive elements placed in one plane with the first and the second pairs of ferro-sensitive elements, placed in one plane with the first and the second pairs of ferro-sensitive elements one with respect to another at distance that is equal to three fourths of the length of the source of magnetic field, and connected to each other like the first and the second pairs of ferro-sensitive elements, output windings of those are connected in series to output windings of the third and the fourth pairs of ferro-sensitive elements. Indicator additionally includes the fifth pair of ferro-sensitive elements output windings of which are connected by differential circuit, sixth pair of ferro-sensitive elements output windings of which are connected by differential circuit as well, at that the fifth and the sixth pairs of ferro-sensitive elements are placed one with respect to another at distance that is equal to half of length of the source of magnetic field, and the ends of output windings of ferro-sensitive elements placed at one side of the source of magnetic field are combined, besides that it includes the seventh and the eighth pairs of ferro-sensitive elements placed in one plane with the fifth and the sixth pairs of ferro-sensitive elements one with respect to another at distance that is equal to three fourth of the length of the source of magnetic field, and connected to each other like the fifth and the sixth pairs of ferro-sensitive elements, output windings of those are connected in series to the output windings of the seventh and the eighth pairs of ferro-sensitive elements, at that the fifth, sixth, seventh and eight pairs of ferro-sensitive elements are placed in plane normal to the plane of placement of the first, second, third and fourth pairs of ferro-sensitive elements.