Principle of Magnetic Separation Thickness Gauge

A magnetic detachment Thickness Gauge is an instrument used to measure the thickness of metals or other conductive materials. Its principle is based on the action of magnetic attraction and electromagnetic induction.

The instrument consists of two parts: the probe and the instrument body. The probe is usually a cylindrical probe with a magnetic chuck with an electromagnetic induction coil at the bottom. The instrument body includes an electromagnetic oscillator and an electromagnetic inductor.

When the probe is attached to a metal surface, it creates a magnetic field that penetrates the metal and forms a "loop". The magnetic field in this loop creates a weakness on the metal surface called a "magnetic detachment point". At this point, the magnetic field is the least dense and the magnetic force is the weakest, so the probe can remain on the metal surface.

When the probe is in contact with the metal surface, the electromagnetic induction coil will sense the electromagnetic signal of the metal surface and transmit this signal to the electromagnetic inductor in the instrument body. By measuring the strength of this signal, the instrument body can calculate the thickness of the metal surface.

Nanfangchao reminds you: The magnetic attraction detachment Thickness Gauge is only suitable for measuring metal surfaces whose thickness is less than the depth of the magnetic attraction detachment point within the measurement range. Therefore, before measuring, it is necessary to determine the depth range of the magnetic attraction detachment point of the probe.