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…