Australian Ultra Violet Services Pty Ltd
E-Mail: austuv@austuv.com.au - Telephone: +61 3 9464 3855 - Fax: +61 3 9464 3866
ABN: 47 006 375 097
Germicidal Lamps
Extensive research has led to the development of today's highly efficient and compact germicidal lamps. They are low pressure mercury-argon. For most practical purposes they may be considered monochromatic sources of 254nm, since 94% of the energy radiated in the visible and ultra violet section of the spectrum is concentrated in this one line. The special quartz glass tube used in the manufacture of the lamp transmits over 80% of this energy.

The UV spectrum is subdivided into four categories:
UVA, 315 - 400nm (long wave)
UVB, 280 - 315nm (medium wave)
UVC, 200 - 280nm (short wave)
Vacuum UV, 100 - 200nm (Ozone (O3))
Micro organisms such as bacteria, moulds, yeasts and protozoa are extremely primitive forms of life and can be destroyed by short-wave ultra violet radiation (UVC).

Germicidal lamps are used for air, water and surface disinfection.

Suitable for: hospitals, pharmaceutical industries, laboratories, dairies, meat industries, animal shelters, bottled water, waste water, cheese factories, sterile holding equipment etc.

NOTE: Always operate lamps with proper auxiliary equipment. Failure to comply with this requirement may result in personal injury or damage to equipment for which the lamp manufacturer cannot assume responsibility.
Maintenance

Lamps should be cleaned regularly using methylated spirits and a clean cloth to remove dust and dirt and thus maintain maximum efficiency.

End Cap Types

Slimline lamps are available in a range of different end caps.
Some of the UV AIR lamp range, for more information regarding lamps please refer to manufacturer.
Personal Protection

Do not look at lighted lamps with the naked eye: Exposure to UV rays can cause harm to the eyes and exposed skin. Always use a UV blocking full face mask or glasses, and cover exposed skin or use sunscreen.

Caution signs must be used on every ultra-violet installation cautioning people to protect their eyes and any exposed skin from the rays of the unit.
Temperature

All U.V. AIR germicidal lamps are designed to operate most efficiently when the tube wall is at a temperature of 42°C.
This graph illustrates the effect of tube temperature on ultra violet output.
Ozone (O3)

Deodorising Effects
A great deal of research has been carried out to determine the deodorising effects of ozone and in general it has been found to be an excellent deodorising agent for many substances. Ozone frees the air of cooking, smoking perspiration, musty and other organic odours. The deodorising effect of ozone is due to its ability to oxidize many odour forming compounds in the air to produce non-odorous substances.

Germicidal Effects
Under conditions of high humidity ozone is an excellent inactivator of micro-organisms provided sufficient concentrations are used for the correct exposure time. Abundant moisture is essential for the bacterial reaction of ozone and, therefore, its use in cool rooms is well justified. In biological installations care should be taken that only non-ozone ultraviolet lamps are used.
Physiological Effects
Ozone produced by ultraviolet lamps is not nearly as toxic as once supposed. The maximum acceptable concentration (M.A.C.) of ozone set by the American Association of Industrial Hygienists and accepted by most authorities is 0.1 ppm per volume or 0.2 milligrams per cubic metre of air. With normal ventilation this will not be exceeded because of the short half-life of ozone.

When common sense is used in engineering installations, ozone produced by ultraviolet lamps will not cause harm to human beings provided of course that the immediate irritation of strong concentrations is avoided. Concentrations of ozone that could cause harm will first cause irritations on the skin, mucous membrane or tissues of the nose and throat and will thus cause personnel to leave the area before harm can be done.

When required ozone concentrations may be measured using the Drager Multi Gas Detector, Model 21/31 and Ozone Detector tube, Cat. No. 31301.5950

Amalgam Lamps
In the realm of UV disinfection, long have low pressure mercury vapour lamps (LPMVL) been used for water, air and surface disinfection purposes. LPMVL’s are still widely considered to be the best lamp type for many of the above applications however, in recent time’s amalgam lamps have fast become the front runner in most forms of water disinfection.

Amalgam lamps typically produce higher intensities of UVC and are capable of maintaining these output levels over a wider range of temperatures. The expected operating life of an amalgam lamp is approximately 12,000 hours, providing the lamp is operating under normal conditions.

Australian Ultra Violet Services P/L can supply amalgam lamps to suit most UV water disinfection systems on the market and are committed to full after sales service.

Lamp Specifications