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UVA UVB and UVC Radiation - Everything You Need to Know

Views: 0     Author: Zayn     Publish Time: 2022-04-14      Origin: Site

Catalogue

1 What is UV radiation?

2 The ABC’s of UV rays

3 UVC

4 UVB

5 UVA

6 The difference between UVA, UVB, and UVC rays

7 Artificial UVC

8 UVC benefits

9 UVC application

10 Dangers of UV light

11 Protect yourself

12 Germicidal UV-C lighting

13 UV-C products from Suntech


1 What is UV radiation?

Solar radiation includes visible light, heat, and ultraviolet (UV) radiation. The ultraviolet radiation spectrum is divided into three regions, called UVA, UVB, and UVC.

Classification of rays

2 The ABC’s of UV rays

UV radiation is divided into three categories according to its wavelength: UVA, UVB and UVC. The shorter the wavelength, the greater the energy of the radiation and the greater the harm. UV radiation has beneficial effects (such as vitamin D production), but there are also some health risks.


3 UVC

UVC(100nm-280nm) is the shortest wavelength of the three forms of ultraviolet light. 

UVC cannot penetrate the Earth's atmosphere as UVC is completely absorbed by the ozone layer. Thus the sun's natural UVC emissions don't penetrate the skin, and actually don't even naturally penetrate the Earth's atmosphere at all. Because UVC cannot pass through the ozone layer, what we usually see is man-made UVC.  UVC is harmful to the human body. When people look directly at it, it will cause ophthalmitis and if the skin is irradiated by it for a long time, it will also cause skin cancer. 

UVC is mainly used for sterilization. Its principle is that the DNA of bacteria cannot be replicated, thereby inhibiting the number of bacteria.

UVC‘s function on DNA

4 UVB

UVB(280nm-315nm) is the second shortest wavelength. It is mostly absorbed by the ozone layer, but still passes through (about 5% overall). UVB can make the skin sunburn and redden in a short time.(below is a picture of the harm). Its benefits are the production of vitamin D, which promotes plant growth.


5 UVA

UVA(315nm-400nm) is the longest wavelength and penetrates the deepest, causing the vast majority (over 95%) of ultraviolet radiation to pass through Earth's atmosphere.


UVA and UVB damage to the skin

6 The difference between UVA, UVB, and UVC rays

UV is widely used and discussed in our daily life, especially UVC. To get a better understanding of UVA, UVB and UVC, lets have a look on the below table.

 Table 1 differences among UVA, UVB and UVC-suntechLED

Wave type

UVC

UVB

UVA

Wavelength

100-280nm

280-315nm

315-400nm

Absorption level

0% pass through the atmosphere (absorbed by the ozone layer)

5% pass through the atmosphere

95%pass through the atmosphere

Penetration distance

does not reach the skin

skin surface

skin dermis

Scope of application

Surface disinfection

Water disinfection

Air purification

Medical field

Plant growth fill light

Lighting validating Check banknotes

Nail lamps


Penetration of uvc, uvb and uva

These wavelengths give different general cured material properties:

uva-uvb-uvc-diff

UVC=Abrasion resistance

UVB=Coating

UVA=Adhesion and cross linking


7 Artificial UVC

UVC radiation is all man-made because the sun's UVC does not pass through Earth's atmosphere. In a specific wavelength range and at a high enough dose, ultraviolet light can cause abnormal chemical bonds between adjacent pyrimidine molecules of DNA or RNA in microbial cells, which hinder the replication of DNA or RNA, thereby causing Microbial cell death. Deep ultraviolet semiconductors achieve the effect of sterilization and disinfection by emitting deep ultraviolet rays with UVC wavelengths. Artificial UVC products can be used in seriers way.


8 UVC benefits

Now you have known a lot of UVC. You might curious about it whether it s bnefit or not. Let s have a look.

whether it s good or not

(1) Ultraviolet sterilization is fast and efficient. When the UV intensity is 30000μW/cm2, it can kill bacteria, viruses, mold spores, algae and fish diseases within seconds.

(2) Ultraviolet rays have an effective inactivation effect on almost all bacteria and viruses.

(3) Ultraviolet sterilization operates stably. Since the process of sterilization and detoxification is physical, it will not produce additional harmful by-products and affect human health.


9 UVC application

9.1 The product can be widely used in sterilization and disinfection of water, air, etc.

9.2 Ultraviolet photolysis oxidation oil fume purification system is currently the most advanced photolysis oxidation oil fume purification system in China.

uvc application


10 Dangers of UV light

When exposed skin is irradiated by such UV lamps, redness, swelling, itching, and scaling may occur in mild cases. At the same time, it can cause inflammation of the conjunctiva and cornea, and long-term exposure may lead to cataracts.



11 Protect Yourself

11.1 When using the UV lamp, there should be no one in the room.

People should avoid looking directly at the light source and must wear protective glasses or sunglasses when operating the disinfection lamp.If you have to close to UVC led, please wear a mask like the below picture.

protect yourself from UVC


11.2 The external power supply must be cut off when wiring to prevent people from touching or damaging the lamps, and the power must be turned on after the product is installed.

cut off

11.3 It is strictly forbidden to press the LED surface.


12 Germicidal UV-C Lighting

The germicidal UVC LED has a single emission peak, and the emission wavelength is continuously adjustable. In terms of environmental protection and energy saving, deep ultraviolet LED materials do not contain environmentally friendly harmful substances. At the same time, deep UV LEDs can save up to 70% of energy compared to traditional UV light sources and are compliant with the EU's Restriction of Hazardous Substances (RoHS standard). Finally, the life of our company's deep ultraviolet LED has been able to reach more than 10,000 hours, exceeding the life of mercury lamps.


13 UV-C products from Suntech

After knowing the differeces and function of UV-C products, you might want to purchase some UV-C products for test. Table 2 shows you UV-C products from SuntechLED.

Please click on the images in the table below to view product details.  

                 

Table 2 UV-C products from SuntechLED-suntechLED   


Image

Wave-

length(nm)

Radiant flux

Radiant flux

Dimension L*W*H(mm)

Germicidal UVC LED Bar Module

Germicidal UVC LED Bar Module

265-285nm

15-20mw

280*60mm

250nm 254nm 255nm UVC Disinfection LED Module

250nm 254nm 255nm UVC Disinfection LED Module

250-255nm

300mw/m

280*40mm

UVC Disinfection LED Module

 

UVC Disinfection LED Module

265-278nm

20mw

240*40mm

UVC LED Bulb 265nm 275nm Germicidal Light

UVC LED Bulb 265nm 275nm Germicidal Light

265-278nm

900/1350mw

135×200mm

Germicidal UVC LED Strip

Germicidal UVC LED Strip

265-278nm

90mw

/

High Power UVC LED Chip

High Power UVC LED Chip

270-280nm

380.87 mW

45*65mm

Deep UVC LED Chip Diode

Deep UVC LED Chip Diode

254nm 255nm

10mw ~ 15mw

36*36mm

Far UVC Led Chip Strip Light

207nm-220nm-222nm-Far-UVC-Led-Chip-Strip-Light-Inactivate-Bacteria-Without-Harm-Skin-400-400

207nm 220nm 222nm

2.5mw

65*45mm

Far UVC Led Light 

Far UVC Led Light

207nm

220nm

222nm

2.5mw

36*36mm

Far UVC 222nm LED Tube Light

 

Far UVC 222nm LED Tube Light

222nm

/

28*120mm


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UVC articles you may be interested in:


Disinfection-&-Sterilization-Standards-of-UV-Products-Application

Disinfection & Sterilization Standards of UV Products Application

Frequently-Asked-Questions-About-UVC

Frequently Asked Questions About UVC

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Top 10 Things to Know Before Buying a UV Black Light LED Strip

Knowledge-and-application-of-UVC-ultraviolet-rays


Knowledge and application of UVC ultraviolet rays

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What is UV-C

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UVA VS UVB VS UVC Light


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