UV Disinfection Systems
Ultraviolet light, better known as
UV, is one energy region of the electromagnetic spectrum. In this
spectrum, UV lies between visible light and X-rays. The shorter
the wavelength the greater the energy produced, therefore UV has
less energy than the X-ray region and more than visible light. The
UV region is made up of four main areas (see the illustrations
below)
Electromagnetic Spectrum
Electromagnetic Spectrum - expanded scale of
ultraviolet radiation
The UV region is divided into four
sub-regions: Vacuum UV, UV-C, UV-B, and UV-A. The standard
wavelength unit is the nanometer (nm).
The UV-A (315-400 nm) region is
used for sun-tanning lamps. UV-B (280-315 nm) and UV-C (200-280
nm) are the regions that contain the wavelengths most effective
for germicidal action. Wavelengths most effective for killing or
inactivating microbes lie below 300 nm. Those most effective in
producing ozone lie below 200 nm. In most cases, the focus is only
on handling microbial contamination, so the range of 200-300 nm is
quite suitable for this.
UV light is emitted as a result of current flowing through the
mercury vapor between two electrodes contained in the lamp's
quartz glass tube. Standard tanning lamps have a glass tube coated
with phosphor, which emits only small amounts of UV, but converts
most of the energy to visible light. In contrast, the quartz
sleeve on germicidal lamps allows a transmission of around 93% of
UV light.
Extol Hydro Technologies offers high quality, reliable
ultraviolet disinfection systems for applications ranging from
small domestic units, to large industrial installations.
We can provide UV systems from the
main components suppliers such as:
-
Berson UV
-
Hanovia
-
American Ultraviolet
-
Wedeco
-
Triogen
