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A: 23 Northgate Drive Thomastown
Victoria 3074 Australia.
T: +61 3 9464 3855
F: +61 3 9464 3866
E: austuv@austuv.com.au |
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| The Germicidal Lamp |
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 ultraviolet 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.
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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)
Micro organisms such as bacteria, moulds, yeasts and protozoa are extremely primitive forms of life and can be destroyed by short-wave ultraviolet 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.
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| 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. |
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| Maintenance |
| Lamps should be cleaned regularly using methylated spirits and a clean cloth to remove dust and dirt and thus maintain maximum efficiency. |
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| End Cap Types |
| Slimline lamps are available in a range of different end caps. |
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| Pictured below is some of the UV AIR lamp range, for more information regarding lamps please refer to manufacturer. |
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| 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. Eg:
CAUTION: PROTECT EYES & EXPOSED SKIN FROM LAMP RAYS
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Temperature
All U.V. AIR germicidal lamps are designed to operate most efficiently when the tube wall is at a temperature of 42°C.
Figure 1 illustrates the effect of tube temperature on ultraviolet output.
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Ozone (O3)
Deodorising Effects
A great deal of research has been carried out to determine the deodorising effects of O3 and in general it has been found to be an excellent deodorising agent for many substances. O3 frees the air of cooking, smoking perspiration, musty and other organic odours. The deodorising effect of O3 is due to its ability to oxidize many odour forming compounds in the air to produce non-odourous substances.
Germicidal Effects
Under conditions of high humidity O3 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 O3 and, therefore, its use in coolrooms is well justified. In biological installations care should be taken that only non O3 ultraviolet lamps are used.
Physiological Effects
O3 produced by ultraviolet lamps is not nearly as toxic as once supposed. The maximum acceptable concentration (M.A.C.) of O3 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 O3.
When common sense is used in engineering installations, O3 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 O3 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 O3 concentrations may be measured using the Drager Multi Gas Detector, Model 21/31 and Ozone Detector tube, Cat. No. 31301.5950
Technical Data for some U.V. Air Germicidal Lamps
HOT CATHODE
Catalogue
Number |
Length*
(mm) |
End Cape
Type |
Operating
Voltage
(V) |
Starting
Voltage
(V) |
Ozone
Producing |
UVC
Intensity
(µW/cm2@1m) |
| G4T15N |
134 |
Mini
Bi-Pin |
30 |
240 |
No |
10 |
| G4T15H |
134 |
30 |
240 |
Yes |
10 |
| G6T15N |
210 |
46 |
240 |
No |
18 |
| G6T15H |
210 |
46 |
240 |
Yes |
18 |
| G8T15N |
285 |
62 |
240 |
No |
20 |
| G8T15H |
295 |
62 |
240 |
Yes |
20 |
| G8T15H/N |
285 |
62 |
240 |
50% |
20 |
*Nominal lamp length shoulder to shoulder.
Note: The correct running gear must be used.
Lamp operating with a starter button are not warranted.
SLIMLINE
Catalogue
Number |
Length*
(mm) |
End Cape
Type |
Operating
Voltage
(V) |
Starting
Voltage
(V) |
Ozone
Producing |
UVC
Intensity
(µW/cm2@1m) |
| G24T15N |
540 |
Single Pin
(Also
available
in 2 pin
or 4 pin) |
70 |
560 |
No |
82 |
| G24T15H |
540 |
70 |
560 |
Yes |
82 |
| G36T15N |
842 |
130 |
560 |
No |
115 |
| G36T15H |
842 |
130 |
560 |
Yes |
115 |
| G48T15N |
1,146 |
110 |
560 |
No |
140 |
| G48T15H |
1,146 |
110 |
560 |
Yes |
140 |
| G62T15H |
1,552 |
110 |
560 |
Yes |
180 |
*Nominal lamp length shoulder to shoulder.
Note: These lamps run on 420mA iron core transformers or electronic ballasts which will be matched to each type of lamp.
The correct running gear must be used.
SLIMLINE "U"
Catalogue
Number |
Length
(mm) |
End Cape
Type |
Operating
Voltage
(V) |
Starting
Voltage
(V) |
Ozone
Producing |
UVC
Intensity
(µW/cm2@1m) |
| G36T15NU |
360 |
Single Pin |
130 |
560 |
No |
115 |
| G36T15HU |
360 |
130 |
560 |
Yes |
115 |
| G48T15NU |
562 |
110 |
560 |
No |
140 |
| G48T15HU |
562 |
110 |
560 |
Yes |
140 |
Note: These lamps run on 420mA iron core transformers or electronic ballasts which will be matched to each type of lamp.
The correct running gear must be used.
COLD CATHODE
Catalogue
Number |
Length*
(mm) |
End Cape
Type |
Lamp
Current
(mA) |
Operating
Voltage
(V) |
Starting
Voltage
(V) |
Ozone
Producing |
UVC
Intensity
(µW/cm2@1m) |
| G10T15N |
376 |
Single Pin |
40 |
240 |
900 |
No |
5 |
| G24T7H |
595 |
40 |
415 |
900 |
Yes |
38 |
*Nominal lamp length shoulder to shoulder.
Note: The correct running gear must be used.
The UVC intensities were measured at 254nm in still air at 32oC after the lamps had burned for 100 hours.
The output of all lamps can vary depending on operating conditions.
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Click to download
the Lamp Specification Sheet.
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