Magnetic Field Viewing Paper Principles And Precautions

Magnetic field viewing paper, also known as magnetic pole display sheet or magnetic pole detection sheet, is mainly used for quickly observing the direction and number of magnetic poles of a magnet. It can be used for maintenance, testing, and teaching experiments. The following are its basic principles and usage precautions.

The core of magnetic field observation paper is tiny magnetic particles sandwiched in a transparent plastic film, which can freely rotate or rearrange. When the test paper is close to the magnet, the magnetic particles will be affected by the magnetic field and automatically align along the direction of the magnetic field lines. At the magnetic pole, the magnetic field lines are more concentrated and the particle arrangement is dense. In areas with weak magnetic fields, the particle arrangement is not obvious and appears as light colored or without significant changes. Through this visual contrast, the distribution of magnetic poles (alternating positions of N and S poles) and differences in magnetic field strength can be visually observed.

Use magnetic field observation paper to examine the pole distribution of a ring magnet magnetized within a 10-pole configuration.

The stripe spacing corresponds to the magnetic pole spacing of the magnet, which can quickly distinguish between bipolar or multipole magnetization modes.

Although the use of magnetic pole observation paper is very simple, there are also several precautions that need to be understood. For example, the test paper must be tightly attached to the surface of the magnet in order to clearly display the position of the magnetic pole. When suspended, the magnetic field will diffuse, which will blur the stripes. Furthermore, test paper is usually very thin and prone to scratching or breaking, and creases can affect the display effect. It should be stored flat, and the magnetic pole observation paper we sell has plastic protection. The last point is that it is only suitable for observing the distribution of magnetic poles, not for accurately measuring magnetic field strength, It also cannot detect whether the polarity is north or south..

At present, magnetic pole observation paper on the market is mainly divided into two colors: yellow and green. In terms of display effect, some will show traces, some will not show traces, and even some will present color effects.

Related products or sales updates;

A4 Sized Magnetic Pole Display Cards Ready For Shipment

Difference between different colors of magnetic field viewing film