Samarium Cobalt magnets are divided into 2 sort, SmCo5 & Sm2Co17, magnetization from axial direction or dia direction are both available, compared with SmCo5, Sm2Co17 magnets have reduced expensive samarium while the magnetism is rising, moreover, its`reversible temperature coefficient is also better than SmCo5 .For working temperature of Smco Magnet is up to 350℃,thus, its` chemical stability and BH use ratio are better than NdFeB in high temperature environment hence it is widely applied on AC servo motor, operator, industrial motor, sensor, aerospace and military areas,like cup magnet,Round Base Magnet.
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LED electronic display cleaning is a high-altitude operation and requires a professional cleaning team. The cleaning operation adopts a high-altitude hanging rope method (commonly known as Spider-Man) or pick and drop crane, equipped with professional cleaning equipment, and the cleaning personnel select different cleaning agents according to different dirt on the screen to perform targeted cleaning, so as to ensure that the LED tubes are not damaged. Under the premise of the mask, the LED electronic display is cleaned. 
Cleaning after installation In order to remove dust and impurities accumulated after a period of time, first consider purchasing a cleaner kit with better quality. The cost of the cleaning solution generally includes electrolyte, high-purity distilled water, and antistatic liquid, which can effectively clean the LED screen. Dust and other imprints on the mark. Some netizens think that clear water can also, but will not affect the outdoor LED display. However, the cleaning effect of clean water is relatively poor, and the cleaned dust will be attached again. At the same time, one thing to note is that you should never spray water on the screen. Instead, spray a small amount of cleaning fluid on the cleaning cloth and gently wipe it in the same direction. Before cleaning, you need to put the power cord. Pull it out.
Cleaning and maintenance are divided into three steps:
The first step: vacuuming. First remove the dirt and dust from the surface of the display mask.
The second step: wet wash. Use water spray and steam humidification to spray the display mask. Use a soft brush on the vacuum cleaner to scrub the lamp mask to clean the dirt.
The third step: drying. Use a vacuum cleaner to dry the drops of water and water left after the wet wash to ensure that the display mask is clean and dust free.
Outdoor LED display requires frequent maintenance to play the best display. Text / Shenzhen LED base (WeChat public number: Shenzhen LED base) 
How to clean outdoor LED display?
Outdoor LED display gradually entered the era of "high-definition", the screen display and color reproduction is particularly important. Factors that determine these effects include the effects of dirt and dust in addition to uniformity, grayscale, refresh rate, contrast, color gamut, and color temperature. Therefore, the outdoor LED display needs to be cleaned regularly to ensure the display effect of the LED screen.
LED display before cleaning (left) and after cleaning (right)