Sigma Bio Shield - Sigma Shields

Sigma
Bio Shields

Safe on Humans and Harsh on Corona

Excimer 222 Far UVC technology - An intro

The Excimer 222 UVC Technology is already revolutionizing Chemical Free Sterilizations, just to authenticate our version we are quoting below few selected bonafide bodies who have validated the technology

WHO; FDA, CDC; NIH, NCBI; NIOSH, EPA, NIAID; DHHS; EU-CDC, and by numerous other institutions.

Top Medical Schools viz MIT, Stanford, Harvard, Nebraska, Colombia, Johns Hopkins, Cornell, Boston, California, Mayo, Toronto, Washington, Pennsylvania, Oxford, Duke, Michigan, Yale, U.S Army Hospitals and many others.

Various Labs and Associations viz ECRI Institute, UL Lab; American Society for Microbiology; American Cancer Society, ASHRAE; Illuminating Engineers Society, Int’l Commission on Illumination and several others.

Finally, internationally most prestigious Scientific & Medical Journals viz Lancet, New England Journal of Medicine, Journal of the American Medical Association, British Medical Journal, Journal of Clinical Oncology, American Journal of Respiratory and Critical Care Medicine, JAMA Internal Medicine, Epidemiologic Reviews, American Journal of Physics, IEEE, Journal of Electromagnetic Waves and Applications and so on.

Basics of the Technology

Excimer Lamps are quasimonochromatic light sources operating over a wide range of wavelengths in the ultraviolet and vacuum ultraviolet spectral regions. Operation of an excimer lamp is based on the formation of excited dimers (excimers), which spontaneously transiting from the excited state to the ground state result in the emission of UV-photons

Excimer lamp is called as Cold UV Radiation since the radiating surface of excimer lamps remains at relatively low temperatures in contrast with traditional mercury UV lamps. Since the medium does not need to be heated, excimer lamps reach their peak output almost instantaneously after they are turned on Excimer lamps unique narrow-band emission characteristics, high quantum efficiency, and peak-energy photons make them the most ideal choice for sterilization of Air, Surface and Water. Rare gas and rare gas-halide Light sources emitting photons in the energy range of 3.5–10 eV produces super-energetic photons to eliminate microbes by destroying nucleic acids and disrupting their DNA Our Sigma Bio Shield Far UV light is an ideal, human-safe, potent, efficient, programmable, uninterrupted and reliable disinfection system available at this point of time for safeguarding enclosed spaces. In the current pandemic era, it is practically impossible to attain such high rate of disinfections consistently with the age-old conventional chemical disinfection, which is toxic, uncontrollable, highly inconsistent, labor intensive and very expensive option. Over and above the chemicals cannot disinfect air Sigma Bio Shield Far UVC energy is soft on humans as they don’t penetrate human and/or animal skin or eyes unlike the conventional UV (254 nm). An exclusively designed Optical filters efficiently filters harmful wavelengths and transmits the permissible wavelengths by strictly complying with the AP-UVGI safety protocols

Human Skin and Eyes Exposure to UVC 222 nm vs UVC 254 nm

Recently the Center for Radiological Research, Columbia University Irving Medical Center, New York has released the much-awaited research report with a caption “Far-UVC light (222 nm) efficiently and safely inactivates airborne human coronaviruses”. Its gist is reproduced below for a quick reference:
A direct approach to limit airborne viral transmissions is to inactivate them within a short time of their production. Germicidal ultraviolet light, typically at 254 nm, is effective in this context but, used directly, can be a health hazard to skin and eyes. By contrast, far-UVC light (207–222 nm) efficiently kills pathogens potentially without harm to exposed human tissues.

We previously demonstrated that 222-nm far-UVC light efficiently kills airborne influenza virus and we extend those studies to explore far-UVC efficacy against airborne human coronaviruses alpha HCoV-229E and beta HCoV-OC43. Low doses of 1.7 and 1.2 mJ/cm2 inactivated 99.9% of aerosolized coronavirus 229E and OC43, respectively.

As all human coronaviruses have similar genomic sizes, far-UVC light would be expected to show similar inactivation efficiency against other human coronaviruses including SARS-CoV-2. Based on the beta-HCoV-OC43 results, continuous far-UVC exposure in occupied public locations at the current regulatory exposure limit (~3 mJ/cm2/hour) would result in ~90% viral inactivation in ~8 minutes, 95% in ~11 minutes, 99% in ~16 minutes and 99.9% inactivation in ~25 minutes. Thus while staying within current regulatory dose limits, low-dose-rate far-UVC exposure can potentially safely provide a major reduction in the ambient level of airborne coronaviruses in occupied public locations

A similar research report issued by a team researcher from the Hiroshima University, Japan further reinforces the facts about the efficacy of UVC 222 nm. The highlights verified by the team under the caption of the report “Effectiveness of 222-nm ultraviolet light on disinfecting SARS-CoV-2 surface contamination” are reproduced below:

222-nm UVC light (0.1 mW/cm2) reduced viable SARS-CoV-2 by 0.94 log10 in 10 seconds
222-nm UVC light (0.1 mW/cm2) reduced viable SARS-CoV-2 by 2.51 log10 in 30 seconds
222-nm UVC light did not reduce SARS-CoV-2 RNA copy number after 5-minute irradiation
TSID50 and not RT-qPCR should be used to monitor far-UVC disinfection of surfaces

In addition to the above, we have numerous validations supporting our claim, if needed we are ready to share them with you

Advantages

1. UV Light Disinfection is a Non-Toxic Process
2. It continuously disinfects Room Air with highest rate of success
3. High average specific power of UV radiation (up to 1 watt/cm3 of active medium)
4. High energy of an emitted photon (from 3.5 to 11.5 eV)
5. Produces up to 100 to 1000 times greater destruction than other UVC Sources
6. It is a Physical Disinfection, which destroys even the Chemical/Drug resistant Superbugs
7. Environmentally friendly Green Technology
8. Zero Warmup, it is instantaneously ready for Sterilization with full irradiance output
9. Quasimonochromatic Radiation with the Spectral full-width
10. Rugged construction withstands harsh HVAC environments
11. It is effective on all Pathogens viz Bacteria, Viruses, Fungi, Protozoa and Parasites
12. This is a One-time Investment and no need to incur recurring Consumable’s cost
13. Lamp is designed to be resistant to Temperature or Humidity
14. High Power Spectral Density of UV Radiation
15. Engineered to not produce Ozone
16. Our One Excimer lamp replaces up to 20 UV-C bulbs
17. Low heating of Radiating Surface
18. There are no Electrodes to wear out
19. It is free of Mercury and other Dangerous Materials