​​Why do the magnets you buy always fail to attract the LED screen? ​ ​
This problem troubles many friends who are new to the industry. Industry statistics last year showed that​ ​38% of LED screen installation accidents are related to incorrect selection of magnets​ ​. Today we will talk about this seemingly simple but hidden purchasing secret, and teach you step by step how to find reliable sources of goods.

​​The first step: first understand the "appetite" of your home display screen"​​

Magnets cannot be bought just for use. You must first find out the "eating habits" of your own equipment. Here are three tips for quick diagnosis:

1. ​​View screen type​​

   • ​​outdoor advertising screen​ ​: You must choose an M4 externally threaded magnetic column with a waterproof rubber ring, which is like wearing a raincoat on the magnet.
   • ​​Stage floor tile screen​ ​: Choose flat magnets with shock-absorbing pads, so you are not afraid of loosening during disco dancing.
   • ​​Transparent window screen​ ​: You must use ultra-thin models (thickness <5mm) so that the light transmittance is not affected.

2. ​​Measure the installation spacing​​
   Take out the vernier caliper and measure the screw holes - M3 thread diameter is 3mm, M4 thread diameter is 4mm. If you buy the wrong model, it will get stuck.

3. ​​Test magnetic strength​​
   For example: P4 outdoor screen requires at least 8 N45 grade neodymium iron boron magnets per square meter, and the suction value is >12kg to be considered stable.

​​Step 2: Start purchasing channels​​

There are a wide variety of products on the market now, so we have to keep our eyes peeled for the following:

​​online channels​​

• ​​B2B platform​ ​: Alibaba is suitable for buying samples, but for bulk purchases, it is recommended to go to professional industrial product platforms, such as those professional stores mentioned on the website, where you can get customized goods with M3/M4 specifications.
• ​​Industry community​ ​: Join more LED technology exchange groups. Manufacturers often offer special offers to clear inventory.

​​Offline channels​​

• ​​electronic market​ ​: In places like Guangzhou Gangding and Shenzhen Huaqiangbei, remember to bring samples for on-site testing.
• ​​Industry exhibition​ ​: At large exhibitions like the Guangya Exhibition, you can directly touch the latest temperature-controlled induction magnets.

Real case: Last year, an old man found the last batch of goods at the exhibition. The unit price of M4 magnetic columns was reduced to 0.25 yuan/piece, which was 40% cheaper than the official website price!

​​Step 3: Please keep the pit avoidance guide​​

Buying magnets is much more complicated than buying groceries. Be sure to avoid these pitfalls:

1. ​​Material Trap​​
   Some merchants use ferrite as NdFeB. Let me teach you how to identify it - the one that can pick up 3 one-yuan coins is the real thing.

   • Ferrite magnet: market price 0.1-0.3 yuan/piece
   • NdFeB magnet: genuine price 0.8-1.5 yuan/piece

2. ​​spec trick​​
   If you encounter anyone who says "universal style", run away! LED screen magnets must strictly correspond to the model. For example, the M4 external thread for outdoor screens mentioned on the website cannot be mixed with the M3 internal thread for indoor use.

3. ​​After-sales routine​​
   Reliable manufacturers dare to promise "free shipping for returns and exchanges", but 80% of those who make you pay for shipping are ulterior motives. The key point is to see if a magnetic test report is provided, just like looking for an appraisal certificate when buying gold jewelry.

​​personal opinion​​

Now this industry is getting more and more popular. Last year, magnets with intelligent temperature control began to appear, which can automatically adjust the adsorption force. Let me tell you, novices should not chase new ones first, just practice with traditional models. Wait until you know the ropes before playing with these high-tech gadgets. Remember, no matter how good the magnets are, they can’t be installed carelessly. Sometimes the problem really isn’t the product itself...

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