WHAT IS UVGI?

UVGI stands for Ultraviolet Germicidal Irradiation, a method of sterilisation that uses ultraviolet (UV) light. The wavelength of UV light is shorter than that of visible light and exists in a number of wavebands.

Our products operate using UVC irradiation at a wavelength of 254 nanometres (nm) to lethally damage airborne microorganisms. This is known as the germicidal irradiation wavelength, and the recognised term for this, throughout the world, is UVGI.

HOW DOES UVGI WORK?

UVGI works as a mutagen to bacteria, viruses and other microorganisms on a cellular level, penetrating the cell wall. This disrupts the microorganism DNA (deoxyrilbonucleic acid), breaking the carbon bond, which causes the death of the cell and/or renders it incapable of multiplying. UV has been known as a mutagen for over a hundred years. In 1903 the Nobel Prize for Medicine was awarded to Niels Finsen for his use of UV against tuberculosis.

Simple installation and ease of operation, together with the cost and environmental benefits over other processes, makes UV air sterilisation a viable technology option for indoor air purification. However, its success depends on the UV intensity combined with 'dwell time' - the length of time particles are exposed to the light.

THE BENEFITS OF ULTRA CLEAN AIR

• 99.9% reduction in the concentration of microorganisms
• Reduced energy operating costs by 20%
• Delivers measurable performance and guaranteed results
• Ideal for new developments and refurbished buildings including: hospitals, offices, commercial premises, hotels, schools, entertainment venues, pharmaceutical manufacturing, clean rooms.

WHAT MAKES UVGI SYSTEMS UNIQUE?

UVGI Systems' products have been developed from UVGI patented technology, and are the result of over ten years intensive research and over £14M investment.

Working alongside air movement and acoustic specialistsMansfield Pollard, research and development has included long-term testing in UK hospitals, at the UK Government Health Protection Agency Biosafety test house Porton Down and with the Pathogen Control Department at the University of Leeds. This has produced an air sanitation product range that harnesses maximum light intensity with optimum dwell time. Each UVGI product features high efficiency, low pressure, high wattage UV lamps mounted within the air stream, shining into a reflective anacoil chamber. Quartz shrouded lamps help prevent tube degeneration and maximise the light intensity to ensure the best possible air sterilisation. This combination means that, for the first time, UVGI Systems are able to deliver measurable performance and guaranteed results with the most powerful, efficient and economical air sterilisation units on the market today - providing ultra clean air.

Principles of UVGI sterilisation in an air movement application

• Dwell time.
• UV intensity and efficiency, in relation to air movement, temperature and humidity.
• Distribution & effectiveness of sterilised air into a live application, from quantifiable, guaranteed results.
• Flexible product base to cover a range of recognised applications for air conditioning and air movement industries.

In the late seventy s, Japanese scholars in TiO2 single crystal electrodes in by light irradiation do after light oxidation reaction and light reduction reaction, water broken down into hydrogen and oxygen. After the study continue to develop. Smooth accelerant in 1972, A.F ujishima and K.H onda in n type semiconductor Tio2 electrode found water photoelectric catalytic decomposition, as the opportunity to start a new era of multiphase light catalyst research. In 1976, Frank will be semiconductor material used in catalytic photolysis pollutant made breakthrough progress. Since then, he again with TiO2 powder catalytic photolysis water pollutants, obtained the satisfactory effect. In the same year Carey also puts forward the application of TiO2 photocatalysis degradation biphenyl and chlorinated biphenyl new method. In the 80 s, semiconductor heterogeneous photocatalysis with increasingly serious environmental problems, the atmosphere, water pollution is not

1. The catalytic

Catalyst or catalyst said, is a chemical substance, itself can reduce the energy needed to chemical reaction, and make chemical reaction occurrence or acceleration response, but she does not change, the reaction happened or acceleration response speed effect called catalyst.

2. Photo catalyst

Smooth accelerant (Photocatalysis) is a kind of to titanium dioxide as a representative of the catalytic function with light the light of the floorboard of semiconductor materials. This kind of material in the light irradiation, the use of specific wavelength light source of energy to generate the catalytic effect, make oxygen and water molecules around stimulate into highly active. OH - and O2 - free ion base, thus has a strong light REDOX function, can destroy bacteria cell membrane and curing virus protein, can promote organic matter decomposition, and a ?

Antioxidant oxidation force comparative list:

1. The sterilization, bacteriostatic:

Tio2 super oxidation capacity can destroy bacteria in the air of the cell membrane, make the bacteria mass loss to death, solidification virus protein, inhibit the activity of the virus, floating in the air of escherichia coli, staphylococcus aureus, white yellow moss bacteria, gather bacteria, pseudomonas bacteria etc has antiseptic effect. And to cause 90% of asthma and allergic disease culprit, dust mites, can be completely eliminated. In the sterilization of in the meantime also can break down SiTi by bacteria on the release of harmful compounds. Sterilization effect is equivalent to 30000 ºC high temperature effect dioxide sterilization speed.