Permanent magnets generate strong forces thanks to their own persistent magnetic field, and they are commonly used in daily life and different industries. It is quite common to find tools and devices made from permanent magnets.
However, the strong magnetic field of permanent magnets could lead to injuries to our bodies and possessions if not handled properly. Some people may ask, are magnets dangerous? What about strong permanent magnets? Are these magnets harmful to electronic devices? Here we will elaborate on these questions and offer useful tips for magnet handling.
Related Reading: Neodymium Magnets in Electroacoustic Devices
Most time not.
A strong magnetic field does no harm to the human body with cautious handling. According to British Pre-Standard No. 50166-1, there is no health risk to the human body in daily cleaning and handling if the magnetic field level is below 3000 Gauss . Additionally, the negative effect of strong magnetic forces is also negligible, which is only 1/5 of the negative impact of television.
That depends on the type of devices.
Permanent magnets might cause damage to some electronic devices like phone cards, smart watches, and credit cards, while cameras, smartphones, CDs, and DVDs are unaffected. Magnetic fields can disrupt the device’s programming and stored information. Therefore, keep your electronic equipment away from strong magnets, and be careful when you are around. You can check the following table to see if your devices are safe or not.
Table 1 Permanent Magnets’ Effect on Electronic Devices
|Danger||Phone cards, smart watches, SD/storage Cards, credit cards, computer equipment, video and audio tapes, pacemaker, and heart defibrillator|
|Unaffected||Cameras, mobile phones, smartphones (No danger for storage medium)
Vehicle keys, USB sticks, memory cards, CDs, DVDs
Table 2 Recommended Safe Distances for Permanent Magnets
|Nd-Fe-B||Magnetic field damaging at:||S-45-30-N
(strength 69 kg)
(strength 11 kg)
|Credit card, ATM card||40mT (=400G)||46mm||19mm|
|Parking garage, admission ticket||3mt (= 30G)||134mm||55mm|
|Pacemaker||1mT(= 10 G)||201mm||82mm|
Strong magnets can be dangerous to the human body if we do not use them with caution. There are several aspects you need to pay attention to in everyday life to avoid injuries and damage.
Operators need to take care of the handling of magnets to avoid potential dangers as well.
Related reading: Use of NdFeB Magnets in Mobile Phones
Permanent magnets are powerful and applied to various fields. They are quite safe for home and business if properly handled. Stanford Magnets provides different permanent magnets at competitive prices. Hope that you can find ideal magnets from our diverse products online. For more information, please check our homepage.
 Magnattack Corporation (n.d.). Safety in Handling Magnets. Magnattack. https://magnattack.com/safety/