How Long Does It Take for UV Light to Sterilize?

Ultraviolet lamps are very popular in the sterilization product market, and more and more industrial sterilization and household sterilization begin to use ultraviolet sterilizers. However, many users do not know how to use the UV lamp after purchasing it, and even do not know how long the disinfection time of the UV lamp is. Some users have poor control over the disinfection time, which affects the sterilization effect. Next, we will introduce the disinfection time and precautions of ultraviolet lamps to you.

1. Disinfection time of household ultraviolet lamps

Under normal circumstances, as long as the ultraviolet intensity is in the range, the ultraviolet lamp can kill the inhaled virus in a few seconds, and it takes more than ten seconds for individual bacteria and viruses to kill. At present, the ultraviolet germicidal lamps are all gas discharge lamps. This kind of ultraviolet lamps has a start-up time. Generally, it takes 3-5 minutes to achieve the best sterilization effect. Therefore, normal sterilization takes more than 5 minutes. If it is to disinfect the surface of objects, such as: drying a quilt, the disinfection of kitchen tableware is preferably between 15min-30min. If you want to kill bacteria and viruses in the air, the disinfection time should be controlled between 30min-120min according to the area of the room. Ultraviolet light is harmful to human eyes and skin. People and pets must leave when using it, and cannot be exposed to ultraviolet rays. Even some shade-loving plants, calligraphy and painting and other items sensitive to ultraviolet rays need to be shaded.

2. How long does it take for UV lamp sterilization?

When used for air disinfection, the doors and windows should be closed. The disinfection time should not be less than 60min each time. The time should be 5min-7min after the light is on. During the irradiation process, personnel are prohibited from entering the room. When they must enter due to work needs, the irradiation should be stopped. When using a disinfection lamp to sterilize items, spread or hang the items to expand the irradiation surface, the effective distance is one meter, and the irradiation is not less than 30 minutes. UV light disinfection takes 60 minutes. Please use UV lamps with caution for disinfection. Most of the ultraviolet disinfection lamps use 254nm short-wave ultraviolet rays emitted by mercury lamps for disinfection.

3. How long is the service life of the UV disinfection lamp?

Ultraviolet disinfection lamps are lamps that use ultraviolet rays to kill pathogenic microorganisms. All surfaces, water and air contaminated by pathogenic microorganisms can be disinfected by ultraviolet rays. The ultraviolet disinfection lamps used in China have high radiation intensity and longer-distance disinfection and sterilization effects. Ultraviolet disinfection lamps are mainly divided into: high pressure, medium pressure and low pressure. Disinfection applications, mainly low pressure. According to the national standard, the average life expectancy is 8000h. Some excellent products have reached 13000h life. Generally, after the ultraviolet germicidal lamp produced by the manufacturer is ignited for hundreds of hours, its ultraviolet intensity decays rapidly, up to 30%, and the sterilization effect is greatly weakened. In addition, the cathode damage caused by processing also affects the life of the UV germicidal lamp. In addition, it should also be noted that when using ultraviolet disinfection lamps to irradiate and kill viruses, no one should be present to avoid injury due to direct ultraviolet radiation on people's eyes and skin. The disinfection time is 30min to 1 hour.