The Zoomlite UVSAN Phone Sanitiser Wireless Charger Pro and the UVSAN Home were tested under a number of different conditions. These conditions helped measure UV-C light dosing strength against a variety of germs.
Zoomlite UV Sanitisers Lab Test Results
Effective germicidal dose
Minimum 108 mJ/cm2 (108,000 μWs/cm2 )
in one 3 minute cycle
Effective germicidal dose
Minimum 30 mJ/cm2 (30,000 μWs/cm2 )
in one 5 minute cycle
Note: UVSAN-HOME has 3 UV-C LEDs on the top lid and 3 more around the periphery of the unit. The above dosage is calculated using only the 3 UVC lights on the top lid only. The three UV-C lights positioned around the periphery of the unit will increase the effective dosage.
How do you measure the germicidal dosage required to kill bacteria, viruses and other micro-organisms?
The effectiveness of germicidal UV depends on the length of time a microorganism is exposed to UV, the intensity and wavelength of the UV radiation, the presence of particles that can protect the microorganisms from UV, and a microorganism's ability to withstand UV during its exposure. In air and surface disinfection applications the UV effectiveness is estimated by calculating the UV dose which will be delivered to the microbial population. The UV dose is calculated as follows:UV dosage (μW·s/cm2) = UV intensity (μW/cm2) × exposure time (seconds).
The table below details some common bacteria and viruses, as well as the UV-C Dosage required to kill each pathogen. This information is based on the following UV Irradiation Dosage Table.
Based on this information, the number of cycles required in your UVSAN devices have been calculated in the final column below. To achieve a kill rate of 99.9% you effectively need to double the dosage needed for a 99% kill. In most cases your UVSAN will produce sufficient dosage to reach 99.9% sterilisation and more. Increasing the cycle time will increase the dosage, where further cycles are needed to reach the required dosage.
For example most of the bacteria listed by American Air and Water require a dosage of between 2.5 mJ/cm2 and 15 mJ/cm2 for 99% kill rate (between 5 mJ/cm2 and 30 mJ/cm2 for 99.9% kill rate). Both the UVSAN Home and the UVSAN Pro provide sufficient dosage for the 99.9% kill rate of these bacteria. Most of the viruses listed require between 6.6 mJ/cm2 and 8 mJ/cm2 for 99% kill rate (13.2 mJ/cm2 and 16 mJ/cm2 for 99.9% kill rate). Most of the yeasts listed required between 6.6 mJ/cm2 and 13.2 mJ/cm2 for 99% kill rate (13.2 mJ/cm2 and 26.4 mJ/cm2 for 99.9% kill rate). Both the UVSAN Home and UVSAN Pro provide sufficient dosage for the 99.9% kill rate of these viruses and yeasts.
1.Direct exposure to UV-C light is required to kill bacteria and viruses. Surface areas not directly exposed may not be dosed to the above levels. The type of object can impact the ending dose results. Additional testing is currently being performed. Distance of of the object from the UV-C lights will effectively reduce the dosage.
2. The below links gives dosage needed in µWs/cm2. 1000 µWs/cm2 =1 mJ/cm2
|Name||Description||Kill Dosage (99%)||UVSAN-Home & UVSAN-Pro - cycles required|
|Escherichia coli||Escherichia coli (abbreviated as
E. coli) are a large and diverse group of bacteria found in the environment, foods, and intestines of people and animals.
Although most strains of E. coli are harmless, others can make you sick. Some kinds of
E. coli can cause diarrhea, while others cause urinary tract infections, respiratory illness and pneumonia, and other illnesses.
|Staphylococcus aureus||Staphylococcus aureus (staph), is a type of germ that about 30% of people carry in their noses. Most of the time, staph does not cause any harm; however, sometimes staph causes infections. In healthcare settings, these staph infections can be serious or fatal, including:
Bacteremia or sepsis when bacteria spread to the bloodstream.
Pneumonia, which most often affects people with underlying lung disease including those on mechanical ventilators.
Endocarditis (infection of the heart valves), which can lead to heart failure or stroke.
Osteomyelitis (bone infection), which can be caused by staph bacteria traveling in the bloodstream or put there by direct contact such as following trauma.
|Candida albicans||Candida albicans is the most common candida that can cause fungal infections in humans.
Candida can cause infections if it grows out of control or if it enters deep into the body (for example, the bloodstream or internal organs like the kidney, heart, or brain). Some types of Candida are resistant to the antifungals used to treat them.
|Salmonella typhimurium (Bacillus aertrycke)||Salmonella is 1 of 4 key global causes of diarrhoeal diseases. Most cases of salmonellosis are mild; however, sometimes it can be life-threatening. The severity of the disease depends on host factors and the serotype of Salmonella.
Antimicrobial resistance is a global public health concern and Salmonella is one of the microorganisms in which some resistant serotypes have emerged, affecting the food chain.
|Streptococcus viridans||This group of Streptococci are most often found in the mouth, gut and genital region. The most serious Viridans infections occur when the bacteria enters other regions of the body. For example, if Viridans gets into the bloodstream it can cause endocarditis (infection of the inner lining of the heart).
Individuals with damaged heart valves or cardiac abnormalities and compromised immune systems are at particular risk. Symptoms include: tiredness, weakness, fever, weight loss, respiratory problems, problems with heart function in cases where endocarditis occurs.
|Bacillus anthracis - Anthrax||Anthrax is a serious infectious disease caused by gram-positive, rod-shaped bacteria known as Bacillus anthracis. Although it is rare, people can get sick with anthrax if they come in contact with infected animals or contaminated animal products.||8.7 mJ/cm2||1|
|Corynebacterium diphtheriae||Corynebacterium diphtheriae is the bacterium that causes the disease diphtheria. Corynebacterium diphtheriae is a rod-shaped, Gram positive, non spore-forming, and nonmotile bacterium. The disease occurs primarily in tropical regions and underdeveloped countries but has been known to appear throughout the world.||6.51 mJ/cm2||1|
|Mycobacterium tuberculosis||Tuberculosis (TB) is caused by a bacterium called Mycobacterium tuberculosis. The bacteria usually attack the lungs, but TB bacteria can attack any part of the body such as the kidney, spine, and brain.||10 mJ/cm2||1|
|Shigella dyseteriae - Dysentery||Shigella infection (also known as shigellosis) is an infection of the digestive tract (or gut), caused by Shigella bacteria. These bacteria are only found in humans and other primates. Shigella dysenteriae causes the most serious illness, and you are more likely to catch this while travelling to developing countries. Shigella bacteria are mainly found in humans, so person-to-person spread is most common. You only need to ingest a small number of these bacteria to become ill.Shigella dysenteriae is most often seen in people who have travelled to developing countries.||4.2 mJ/cm2||1|
|Infectious Hepatitis (Virus)||A highly contagious liver infection caused by the hepatitis A virus. Hepatitis A is preventable by vaccine. It spreads from contaminated food or water or contact with someone who is infected. Symptoms include fatigue, nausea, abdominal pain, loss of appetite and low-grade fever. The condition clears up on its own in one or two months. Rest and adequate hydration can help.||8 mJ/cm2||1|
|Influenza (Virus)||Influenza (the flu) is a highly contagious disease, usually prevented by vaccination and treated by managing symptoms. Spread by body fluids from infected people, symptoms include a runny nose and sore throat. Flu can affect anyone but is especially serious for babies and older people.||6.6 mJ/cm2||1|
|Saccharomyces cerevisiae (Yeast)||Saccharomyces cerevisiae is increasingly being promoted as a nutritional supplement by health food enthusiasts and is also recommended as prophylaxis against antibiotic-associated diarrhea. However, severe opportunistic infections due to S. cerevisiae have been reported in patients with chronic disease, cancer, and immunosuppression. Fungemia, endocarditis, pneumonia, peritonitis, urinary tract infections, skin infections, and esophagitis have been described.||6.6 mJ/cm2||1|
|Poliovirus - Poliomyelitis (Virus)||A virus that may cause paralysis and is easily preventable by the polio vaccine. Polio is transmitted through contaminated water or food, or contact with an infected person. Many people who are infected with the poliovirus don't become sick and have no symptoms. However, those who do become ill develop paralysis, which can sometimes be fatal.Treatment includes bed rest, pain relievers and portable ventilators.||13.2 mJ/cm2||1|
SARS COVID Testing
Preliminary research has been undertaken into the effectiveness of UV-C light against SARS-CoV-2 - the virus behind COVID-19. According to this research a dose of 10.8 mJ/cm2 should be adequate to kill the virus with a 99.9% kill rate. You can read the research via this link.
Please note that the SARS-CoV-2 virus is not available for testing against individual commercial products at this time. We hope to get each of our devices tested against it when it becomes available.
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