UV LED Selection and Classification

Ultraviolet classification Depending on the biological effects, the ultraviolet rays are divided into four bands according to the wavelength: UVA wavelength is 320 400nm, also known as long -wave and black spots. It has a strong penetrating power, which can penetrate most of the transparent glass and plastic. It can reach the skin dermis layer, destroy the elastic fiber and collagen fiber, and the skin is black. Can make insect lamps, or use for ore appraisal, stage decoration, banknote inspection and other places. UVB wavelength is 280 320nm, also known as mid -wave erythema effect ultraviolet rays. Most of the medium penetrating power, mostly absorbed by the ozone layer, only less than 2%can reach the surface of the earth, and it will be particularly strong in summer and afternoon. UVB ultraviolet rays have erythema effects on the human body and can promote the formation of mineral metabolism and vitamin D in the body. However, long -term or excessive exposure will cause the skin to dry. Can be used for production of UVB health lights, plant growth lights, etc. UVC wavelength 200 275nm, also known as short -wave sterilization UV. Its penetration ability is the weakest, and it is almost completely absorbed by the ozone layer. Its effect on bacterial virus is incomparable. UVD wavelength is 100 200nm, also known as vacuum ultraviolet rays. In each wavelength ultraviolet, only UVC has sterilization and disinfection effects, which is a method of dry and pure physical disinfection. It has the characteristics of high -efficiency, fast and thorough, and no need to add chemicals, non -anti -drug, and secondary pollution. Therefore, it is widely used in hospitals in hospitals , Disinfection cabinet, water treatment equipment, water dispenser, sewage treatment plant and other fields. UVC LED's characteristic of sterilization advantages non -contact sterilization: perfectly applicable to various scenarios such as air, water, surface and other scenes. High -efficiency sterilization: The sterilization of bacteria and viruses is completed within a few seconds, and the efficiency can reach 99.99%. Sterilization broad -spectrum: UVC sterilization broad -spectrum is the highest. It can kill safety and environmental protection at high efficiency to almost all bacteria and viruses: UVCLED lights emit UVC without producing ozone, no mercury, no secondary pollution, and truly safe and environmental protection. Can purify organic pollutants: can effectively remove organic pollutants such as formaldehyde in the air and remove odor.