Ultraviolet led sterilization

UV LED working conditions in indoor

 

UV LED working conditions in indoor
Ultraviolet light strip for indoor air disinfection,often can not be reached on schedule sterilization effect because of irradiation intensity is not enough,   so we need to detect the radiation intensity of ultraviolet light,The UV led basic idea was this use of UVC radiation intensity ultraviolet germicidal wavelength to irradiate,  therefore detect radiation intensity UV led with UVC ultraviolet radiation meter (also called UV light meter, UV intensity meter, etc.).  UV radiation intensity is the basic factors for affecting the disinfecting effect, according to the “disinfection technical specifications” provisions. ordinary 30W UV lamp, the new UV lamp radiation intensity should be greater than 100VW / cm2 (distance 1m) is qualified, the radiation intensity of the lamp is used to reach the minimum 70VW/cm2 can be used, but must be increased irradiation time.
According to the formula of ultraviolet irradiation = ultraviolet radiation * irradiation time can be obtained to extend time for different intensity, it can also be obtain that low-intensity or high-intensity short time sterilization can get the same effect. If the intensity of the ultraviolet light source is less than 40VW / cm2, it can not be used to prolong the irradiation time. Do not think that as long as the UV lamp is lit,The UV led Will be able to job( sterilization).

Ultraviolet led sterilization

 

There are two sides to talk about Ultraviolet LED sterilization:
First, ultraviolet irradiation all kinds of bacteria, such as DNA, RNA, etc., to interrupt or rearrangement, destroy bacteria, viruses, DNA, This makes bacteria can not be divided into replication, play a role in disinfection. Thereby enabling the bacteria died of natural causes or kill bacteria;
Second, the role of ultraviolet radiation on the oxygen in the air to produce ozone oxidation,oxidizing ozone can kill bacteria.. Basically all bacteria can kill, even for large creatures also have an impact.Such a conclusion that uv led strip has already been used for water and air disinfection, UV led lamps produce ultraviolet C (UVC) irradiation of the water,the water of bacteria, viruses, algae to have accepted such a UV lighting(such as UVC  wavelength 254nm irradiation). the cell’s DNA, RNA structure was destroyed, the cell can not be regenerated, bacterial virus loss of self replication, so as to achieve the purpose of disinfection.

Trapping insects with uv led strip

 

Trapping insects with uv led strip
We stopped by to Review the bactericidal lamp.the UV light bactericidal emission spectrum lines are mainly 254nm and 185nm two types.
Now Ask we about Trapping insects lamp;
Black light is a special lamp and it emits ultraviolet light wave as 330-400nm. which is not sensitive to light human, such humans were not sensitive 330-400nm.aslo called black light black light lamp. User can be used for trapping and killing insects at night, special lamp Help us understand how special lamp oort cloud really works. is because: phototaxis insects on the retina is a pigment. It can absorb light of a particular wavelength, and cause light reaction stimulate the optic nerve, organ movement command through the nervous system, causing insect wings and feet movement, directional light source. Because the insects in the visible region of the visible region(390-770nm) is short than humans.Most phototaxis insects like ultraviolet waves and violet wave 330-400nm, Therefore, specially designed to be able to radiate light 360nm black light. so as to be able to trap and kill most pests and forecasting.

Characteristics of UV led strip disinfection

 

Characteristics of UV led strip disinfection
Bactericidal effect of Ultraviolet led strip is stronger, but the object of penetration is weak. It applies to the operating room, burn unit, space disinfection of infectious diseases between rooms and sterile and non-heat-resistant materials and countertop surface disinfection.
ultraviolet absorption and coincidence photochemical sensitivity range have crossed between UV led strip disinfection’ band with DNA of microbial nucleus.The absorption spectrum of DNA was 240~280nm and the absorption peak was 260nm.It is commonly considered that UV led strip can change and destroy the structural , change the genetic transcription of the cells, and make the organism lose protein synthesis and reproduction ability, other protein absorption (phenylalanine, tryptophan and tyrosine in the absorption peak of 280nm) may also play a role in UV disinfection process.InGeneral , The wavelength of sunlight ultraviolet radiation reaching the surface of the ground is 287~390nm, and the wavelength of ultraviolet radiation is about 250~285nm.
the absorb function of atmospheric ozone layer which can reduce the intensity rate of 290nm UV, so the sterilization ability of the sunlight is less than that of the 290nm uv led.

UV 365nm and 375nm LED

 

A buyer had been bought that 365NM UV flashlight unexpectedly is 375NM UV flashlight(use 375NM UV led).We know the truth now,many buyers do not have the professional knowledge of the uv led and related professional equipment, unable to identify that 365NM & 375NM ultraviolet.
Now we discuss the differences point of 365NM, 375NM UV LED .365NMwould be better suited for a special occasions and detection Effect is better.  Currently,365NM & 375NM is it was used paper money, high-grade alcohol and tobacco , amber emerald gemstone inspection, That’s why the user are buying (uv led)? the two bands can meet the requirements basically,many buyers Can’t distinguish between the uv 365NM & 375NM. so at special occasions, the 375NM uv led strip can’t meet requirements.
Follow on ，talk about uv 365nm, Effect is betterwhen its use in industry.  some glue or ink curing, parts scar detection, fluid trace detection (including pipeline leak detection, forensic testing and other aspects of the traces fluids 。they needed more strong uv led to operate. The 365NM Is preferred.
Finally, have a simple for you. As follows:

Observation results:
*Green fluorescence with bright, green lines is very clear with 365nm ultraviolet light.
*Green fluorescence, the green lines is not clear, when use the 375nm ultraviolet light.