History of UV-C Technology
What is Ultraviolet Light?
UV-A (315nm - 400nm)Black lights and tanninglamps, harmful to eyes
UV-B (280nm - 315nm)Causes sunburn and skincancer
UV-C (200nm - 280nm)Germicidal - Damages DNA in cells, optimum
at265 nm
UV occurs naturally in sunlight
UV-C is naturally filtered by the ozone layer
How Does Ultraviolet Light Disinfect?
The Earth’s ozone layer filters UV-C which occurs naturally in sunlight
Germicidal UV-C systems artificially generate a wavelength of 254 nm which inactivates (disrupts DNA) of microorganisms including viruses, bacteria and mold
. Germicidal UV has been used safely in water, air and surface disinfection for many years
Fluorescent/Germicidal Lamp
Construction of UV-C Lamps
UV-C Lamps do not have the Fluorescent powder coating on the inside of the glass allowing the UV-C radiation outside of the lamp
Calculating Dosage
DOSAGE = Intensity x Time
Dosage is what determines effectiveness
Tech Note: A Dosage of 330,000 µw/cm2 is required to “kill” Mold Aspergillus Niger
A 18 watt Biax Germicidal Lamp has a UV irradiance of 51 µw/cm2/sec
}}(Time)(Time)
(Intensity)(Intensity)
4,320,000 µw/cm2 ((DosageDosage))
50 µw/cm2
x 60 sec. x 60 min. x 24 Hours
Example:
Any organic based cell exposed to UV-C Absorbs it at the molecular level...
The organism is now destroyed & ineffective.The organism is now destroyed & ineffective.
It is unable to reproduce & unable to infect.It is unable to reproduce & unable to infect.
How It Works…
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