What Are the Small Particles in the Ultraviolet Lamp?

In the past six months, with the widespread use of ultraviolet germicidal lamps, some application problems related to the use of ultraviolet mercury lamps have been fed back to our company, especially that there are obvious small particles that are visible to the naked eye when the ultraviolet lamps (mercury lamps) are used. The customer has a certain question about this: Are the small particles/impurities inside the ultraviolet lamp caused by quality problems as a result of problems in production quality management? Will the impurities in the lamp affect the service life of the lamp? In fact, the particles inside the tube of the ultraviolet lamp (mercury lamp) are mercury particles. The working principle of the ultraviolet germicidal lamp is to use current to excite the mercury vapor in the lamp tube to emit light. It can be said that the ultraviolet germicidal lamp uses mercury vapor as the light source. When the lamp is turned on, the mercury liquid will be heated and sublimate into the mercury vapor. Inside the lamp, there are two levels of current distributed on both sides of the mercury vapor lamp. At this time, the current will break through the mercury vapor to form a loop, and the arc light becomes the light we see under the mercury vapor. The substance in the ultraviolet germicidal lamp (mercury lamp), which looks like a particle, is the element for the normal and efficient light emission of the ultraviolet lamp (mercury lamp). At the same time, it can also be used to judge whether the ultraviolet lamp has been used. 

The principle of the ultraviolet lamp for disinfection is to use ultraviolet radiation to irradiate the space and the surface of the object for a specified time, so that the bacterial protein is photolyzed and denatured, and the amino acid, nucleic acid, and enzyme of the bacterial body are destroyed and died. At the same time, when the ultraviolet rays pass through the air, the air is oxidized and ionized to produce ozone, which further carries out ozone disinfection on the sterilization irradiation space and purifies the air. 

At present, large-scale ultraviolet light sources in various fields mainly use quartz lamps made of quartz glass. According to the nature of the lamps, they are divided into ultraviolet high-pressure mercury lamps (365nm), low-pressure mercury lamps (254nm and 185nm), etc. The low-pressure mercury lamps adopt the principle that the low mercury vapor pressure (<10-2Pa) is excited to emit ultraviolet light, and its frequency bands of lighting are 254nm and 185nm wavelengths. Because ultraviolet rays cannot pass through ordinary glass, quartz glass must be used, and it must be high-purity quartz glass, which requires a very low impurity content. Therefore, the small particles of impurities that appear in the ultraviolet mercury lamp are high-purity mercury particles. The ultraviolet lamp developed and produced by LONGPRO uses high-transmittance quartz glass, which has high ultraviolet transmittance and strong sterilization effect. Customers can use lamps of different diameters and different lamp caps according to their needs. LONGPRO provides ozone, ozone-free types and a variety of wattage options.

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Xin'an Industrial Zone, Danzao Town, Nanhai, Foshan, Guangdong Province, China