Far Ultraviolet Light 2w Far UVC 222 nm Lamp

According to research, 222nm far ultraviolet light will not cause damage to human skin and eyes, and the sterilization rate is as high as 99.99%, which means that 222nm ultraviolet products can be used in an environment with people. Traditional ultraviolet disinfection products are harmful to the human body, and even cause diseases such as skin cancer and cataracts in severe cases. However, the far uvc 222 nm lamp do not have this disadvantage and can meet people's needs for disinfection anytime, anywhere.

 

Features

1. Effective sterilization wave length 222NM

2. Effectively reduce viruses, bacteria and spores
3. Safe for human skin and eyes
4. Environmentally friendly

5. Mercury-free

6. Fast light output

 

 

 

 

 

Parameters

 

Model No.:	UWF222-2W
Power:	2w
Input voltage:	5vDC
Working voltage:	1000vAC
Working current:	2ma
Peak wavelength:	222nm
Radiation intensity:	900μw/cm²(0cm)
Time to reach 90% UV output:	3s
Max. allowed temperature:	180℃
Materials:	Quartz glass tube, Krcl noble gas
Lifetime:	4000hours

 

 

 

 

Dimensions

 

Size: 93mm(L)*93mm(W)*65mm(H)

Structure: see below

 

 

 

 

Irradiation intensity

 

Testing tool: UV meter special for 222nm products

Testing steps:

1. Turn on the 222nm light

2. After 10 minutes, put the detection probe of the UV meter straight in front of the light

3. Change the distance between the detection probe to the light surface

4. Record the irradiance data at different distances

5. Figure out the time it take to reach different germicidal radiation dose

 

 

 

 

Spectral Curve

 

Peak wavelength: pure 222nm

Half wave width: 5nm

 

 

 

 

At present,222nm disinfection lamps can achieve the same disinfection and sterilization effect without harming the human body, which overcomes the fatal shortcomings of ultraviolet sterilization. So the future market of 222nm ultraviolet rays is also showing an optimistic trend. In the future, it will be gradually applied not only in the field of home furnishing, but also in industrial and commercial fields.

 

Application

1. Disinfection for occupied space such as home, office, library, restaurant

2. Portable and rechargeable, suitable for desktop use

3. Medical use

4. Pet health

 

 

 

222nm ultraviolet rays are harmless to the human body

Most of the ultraviolet lamps we use in our daily life are ordinary straight-tube hot-cathode low-pressure mercury lamps, which can generate sufficient intensity of ultraviolet rays with a wavelength of 253.7 nm after being powered on, and can reach 99% disinfection effect after a certain period of irradiation.

How does ultraviolet light play a role in disinfecting?

Throughing a large number of experiments，scientists have found that DNA/RNA in bacterial viruses absorb part of the ultraviolet rays in the UVC band. It is not difficult to see from the figure below that the absorption is the strongest near 260 nm.

 

When DNA/RNA absorbs a large amount of ultraviolet rays, the helical structure of bacteria and viruses will be destroyed, which will cause its metabolic function to be hindered, and at the same time, the genetic ability will be lost. Bacteria and viruses are inactivated when the irradiation intensity and time are sufficient.Therefore, as long as the light source can meet the requirements of emitting ultraviolet light with a wavelength around 260 nm, the light intensity is strong enough, the material cost of the light source is low, and the manufacturing is convenient, it can be easily applied to daily life for sterilization and disinfection. After a comprehensive comparison, because the low-pressure mercury lamp can emit ultraviolet rays with a relatively strong wavelength of 253.7 nm (satisfied around 260 nm), the cost of using mercury is low, and the manufacture of the low-pressure mercury lamp is relatively simple, it is very popular in the market.It should be noted that the 253.7 nm ultraviolet rays have high energy and can penetrate into the skin. If the human body is exposed to ultraviolet light for a long time, the skin and eyes will be damaged, ranging from electro-optic ophthalmia and skin burns, to cataracts, skin cancer. Therefore, when the ultraviolet lamp is turned on, people must wait in a place where the ultraviolet lamp cannot reach.

In this situation, 222 nm far ultraviolet light began to appear on the market.

The principle of 222 nm ultraviolet light inactivating bacteria and viruses is the same as that of 253.7 nm. We can see from the above absorption spectrum that, in addition to the region around 260 nm, there is also a trend of increasing absorbance around 220 nm. Although this trend is not as high as that of 260 nm, if given enough light intensity and irradiation time, it is reasonable to have a disinfecting effect. Scientists tested the disinfecting ability of 253.7 nm and 222 nm ultraviolet rays through comparative experiments.

Comparing the disinfecting ability of the two kinds of ultraviolet rays, it can be found that the disinfecting ability of the two kinds of ultraviolet rays is almost the same. 222 nm even surpasses 253.7 nm at low intensities.

Why 222 nm is basically harmless to the human body

It cannot be considered only from the perspective of energy, but also the change of ultraviolet penetration ability after the wavelength is shortened. From the introduction of UVA, UVB, and UVC, we can see that when the wavelength of ultraviolet light becomes shorter, its penetrating ability is also weakened.

Therefore, the penetration depth of 222 nm ultraviolet rays in the skin is much shallower than that of 254 nm ultraviolet rays, and the damage to the human body is naturally less.

The scientists conducted an experiment in which some male hairless mice were exposed to far uvc 222 nm lamp , some were exposed to 253.7 nm ultraviolet rays, and the other part was not exposed at all. Under the condition that the intensity of ultraviolet light and the irradiation time were consistent, the changes in the skin were observed 48 hours after the end of the exposure.

It can be seen from the figure that the skin changes of the three groups of mice after irradiation were different, and those exposed to 222 nm ultraviolet radiation were almost indistinguishable from those without irradiation, while the skin was severely damaged by 253.7 nm ultraviolet radiation.Therefore, the research team concluded that far-ultraviolet light with a wavelength of 222nm is harmless to human skin and has a strong ability to sterilize and disinfect.

 

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