Abstract: An apparatus for gauging the thickness of coatings on metal products, whose casing accommodates: a wheel system; a spring actuator having a means for its being wound up, said actuator being connected to one of the members of said wheel system for said system to rotate; two balanced levers the first one of which carries a gauging permanent magnet adapted to interact with a ferromagnetic coating of the product being gauged or with the base thereof in case of a non-magnetic coating while the second lever is adapted to interact with said first balanced lever in cases where the break away force of the first balanced lever is not high enough to break-away said gauging permanent magnet from the product being gauged; two coiled springs of which one spring is connected, to said first balanced arm, and to one of the shafts of said wheel system, whereas the other coiled spring is connected, to said second balanced lever, and to said casing in such a manner as to adjust the spring tension; a magnetic element attached to

Abstract: An apparatus for gauging the thickness of coatings on metal products comprises a casing which accommodates a wheel system; a spring actuator with a mechanism for its winding, the actuator being linked to the wheel system so as to enable its rotation; two levers independently balanced in a static state the first of which carries a permanent magnet interacting through its field with a ferromagnetic coating on a product or with the base thereof in case of a nonmagnetic coating, the second of the two levers interacting with the first lever in the event when its force necessary to break away the permanent magnet from the product being gauged is insufficient; two coiled springs, the first of which is connected through one end thereof with the first lever and through the other end with one of the shafts of the wheel system, the second of the two coiled springs being connected through one of its ends with the second lever and through the other end thereof with a spring tensioning control mechanism.