Shield magnet - how it works

Studies show that strong magnetic fields can endanger human health. Therefore, you should know how to shield a magnet. In this post, we explain what you need to consider.

How to shield a magnet

If possible, shield magnets and their fields as they are dangerous for the cells in the human body. Magnetic fields can create voltages between the cells.

• You cannot completely shield magnetic fields, you can only redirect them.
• Objects made of materials that are easy to magnetize, such as iron, are best suited for this. Soft iron in particular deflects magnetic fields very well.
• You can shield the magnetic effect well with iron, because magnets are partly made of iron due to the high magnetic force.
• Neither paper, glass or cardboard, nor aluminum or brass work because they have no magnetic effect.
• In order to shield the magnetic field, you do not necessarily have to put the iron on the magnet, but can simply push it in front of the magnet.
• In addition, a kind of counter field can be created with copper. Copper is conductive and can generate circulating currents that act against the magnetic field.

Shield the magnetic field from mobile phones

Mobile phones also generate magnetic fields. These can, for example, make you sleep less well at night when your cell phone is next to you on the bedside table.

• Whenever electrical current flows, a magnetic field is generated - this also applies to mobile phones.
• Since magnetic fields can also flow through the human body, they generate electrical currents in the body and influence the nerve and muscle cells.
• However, the force of the magnetic field can easily be reduced. The force drops many times per meter from a magnetic field.
• Magnetic fields can easily flow through house walls and any metal other than iron, but it helps if you don't put your cell phone on the bedside table, but remove it a few meters from your body.
• So don't use the cell phone as an alarm clock, but switch it off at night and put it as far away as possible.

Shield magnets from other objects

Since some magnets emit a large magnetic field, they can affect or even damage other objects. Especially things that have a magnetic stripe, such as credit cards, are at risk.

• If your credit and bank cards or your ID with a magnetic stripe come too close to a magnetic field, the magnetic stripe may become demagnetized and your cards may no longer work.
• Therefore, you should not put your bank cards on the TV or leave them lying next to your cell phone and protect them especially in hospitals, where, for example, MRI devices generate a strong magnetic field.
• Usually your wallet cards don't come close enough to strong magnetic fields to demagnetize them.
• For security, however, you can put your bank cards in special card sleeves.

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