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UV - Ultraviolet Technology

Ultraviolet (UV) water purifier provides one of the most effective ways of purifying water by removing biological contaminants. UV purifiers are used to guard against water-borne viruses, bacteria and other disease-causing microorganisms such as giardia, cryptosporidium, etc.

In UV Water Purifiers, invisible Ultraviolet (UV) light is emitted by a UV light source. At certain intensities, UV light emits enough radiation to alter the DNA structure in bacteria and other microorganisms. In an ultraviolet water purifiers a UV light source with an output of around 254 nanometers is used to produce radiation of an intensity greater than that produced by sunlight.
This UV light source is placed in front of a flow chamber through which water passes. The water is exposed to the UV light source as it passes through the chamber. Any harmful microbiological impurities that may be present in this water in the flow chamber gets purified because of this exposure to the ultra-violet radiation.
The UV radiation used to treat water in the UV Water Purifier is effective enough to destroy 99.99% of harmful bacteria and viruses, including those associated with dreaded diseases such as Typhoid, Gastroenteritis, Hepatitis, Flu and Cholera.

There are certain drawbacks of UV technology - 
In conventional UV purifiers, voltage fluctuation, scaling of quartz due to hardness causing elements, improper filtration and increased flow, photoreactivation of certain microbes can result in poor disinfection

Ion Exchange UV purifiers are equipped with patented ESS which ensures complete kill inspite of these drawbacks