Difference between UVA, UVB and UVC
UVA：315-400 nm
Can be used for ore identification, stage decoration, inspection and other places
UVB: 280-315 nm
Ultraviolet health lamp, plant growth lamp
UVC:100-280 nm
They are used in hospitals, air conditioning systems, disinfection cabinets, Water Treatment Equipment, drinking fountains, Sewage Treatment, swimming pools, food and beverage processing and packaging equipment, food factories, cosmetics factories, dairy factories, breweries, beverage factories, bakeries, and cold storage rooms.
Four factors affecting ultraviolet sterilization
1. IRRADIATION INTENSITY: with the height, power, angle (luminous angle, power is certain, the closer the distance, the greater the intensity)
2. Bacterial Resistance (tolerance)
3. Ambient temperature
4. Ambient humidity
If your UVC doesn’t work, check out these four elements
The lower the temperature of the environment, the more humid, on the ultraviolet sterilization effect has a negative impact
Less than 40uW/cm2, the GERMICIDAL efficacy is poor. It is suggested that 70uW/cm2 and 100uW/cm2 are better
Noun resolution of UVC
Radiation Power: W
IRRADIANCE: W/m2 1W/m2 = 0.1 mW/cm2 = 100 uW/cm2
Radiation Time: sec
Radiation Dose: = Time * Illumination J/m2 or uW*sec/cm2
1 J/m2 = 0.1mJ/cm2 = 100uJ/cm2
How to choose an Led Sterilization Device
- Uniform radiation, no less than 0.8
- Quartz glass is better. 1. The material with the highest UV transmittance can pass more than 90% of 253.7 nm UV. 2. The ultraviolet intensity is high, the life is long, the light attenuation is small, the sterilization effect is good
Are UVC Lights Safe for Humans?
Improper use of UVC lamps is not good for people
- No prolonged contact with skin, person or equipment
- Not being able to look directly can damage your eyes and expose them to the risk of Retinal detachment
How much do you know about the application of ultraviolet germicidal lamp in water treatment?
In our daily life, the water treatment UV lamp is actually more common application, the next we will learn about the water treatment UV lamp application principle;
The water treatment includes wastewater treatment, urban water supply treatment, drinking water treatment, purified water treatment and aquaculture water treatment
In principle, there are disinfection, sterilization, photodegradation and other photochemical reactions; from the use of ultraviolet sterilization lamp, there are direct into the water, called immersion;
UV Lamp into stainless steel (or PVC) and other cavity use, water flow through the surface of the lamp sleeve is called over-flow.
UV germicidal lamps are mainly used in water treatment to sterilize:
How it works: The UV light inside the chamber radiates a wavelength of 253.7 nm with a certain intensity. When the water (or liquid) to be treated flows through the chamber, the UV light will kill bacteria, viruses and other microorganisms in the water, to sterilize the water.
It is characterized by the rapid flow of water, generally in the quartz coat flow time is only a few seconds, or even less than a second time.
According to the formula: UV dose = UV intensity * irradiation time, it can be found that the built-in sterilizing lamp UV intensity requirements are very high, according to the need to choose high output lamp, or more power, more number of combination sterilizing lamp.
If you still want to improve the disinfection effect by extending the time, then generally choose a longer lamp, do longer equipment, or in stainless steel wall treatment into a vortex rotating structure, to extend the time of water flow.
For different applications and high requirements of the use of the environment, over-flow disinfection methods not only need to be equipped with a more complex structure; there are also complex control systems, such as UV intensity monitoring system, water temperature monitoring system, disinfection time accumulation, ultraviolet Lamp Monitoring, fault alarm, automatic sound and light alarm and other systems.
In addition, equipment on the environment and the treatment of objects are also required, for example, the transparency of water and temperature play a great role in the disinfection effect, the germicidal lamp needs to work at 40 °C temperature, either too high or too low a temperature can affect the UV output.
Does the UVC lights can kill coronavirus?
According to some Internet reports, UVC lamps have a certain effect on the prevention of the coronavirus. According to experts, using UVC correctly is effective. But both people and pets should leave the room that is being disinfected by ultraviolet light, to avoid damage to the skin and eyes.
The principle of ultraviolet disinfection and sterilization is to use high-energy ultraviolet light to break DNA double helix chain, so as to achieve the inactivation of bacteria and viruses. In order to achieve effective sterilization and disinfection by ultraviolet rays, certain requirements must be met, and attention should be paid to the wavelength, irradiation dose and time of the ultraviolet light source, that is, the deep ultraviolet light in the UVC band with the wavelength less than 280 nm, for different bacteria and viruses to meet a certain amount of radiation dose and time, otherwise can not be Inactivation.
In daily life, “go out less, do not eat together, wash hands frequently, more ventilation” is still the lowest cost and most effective means of epidemic prevention. In the face of the epidemic situation, the use of ultraviolet sterilization lamp disinfection must be scientific and reasonable norms, and must attach great importance to the use of safety.
