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Bulletin 89 |
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Bulletin 89 |
Ultraviolet germicidal lamps produce peak UV
energy at 254 nm wavelength. These
type of lamps are commonly referred to as UVC lamps.
For a more detailed explanation of UVC lamps, refer to Bulletins 66 and
82. UVC light emanating from a lamp
is invisible and must be respected from a safety standpoint.
The bluish glow from a UVC lamp is visible light above 400 nm and is only
an indication the lamp is lit.
Fuller's UV germicidal lamps when enclosed in
Fuller fixtures, allow no direct UV rays on the skin.
Thus, the UV rays are intended for microbial destruction of liquid and
pose no human threat in such circumstances.
The rays destroy microbially contamination in liquids.
The liquids are not affected in any other way than destruction of the
microbes. In other situations
involving air purification, units generally enclose the lamps.
In the case where UV exposure is
unavoidable due to open fixtures, caution must be exercised.
Wherever direct exposure to germicidal energy
is higher than 0.0035 uv-watt-hours/t2, or .25 uv-watt-minutes/ft2,
i.e., an exposure of 7 hours to an intensity of 0.0005 uv-wats/ft2
(.5 microwatts/cm2), measures should be taken to provide good face
and eye protection. Exposure for
one minute 18 inches from a bare 30-watt germicidal tube, or for one hour or
more 12 feet from the same tube, would be considered excessive.
STATEMENT
There are no known harmful physiological effects from the ultraviolet
rays except:
·
Reddening
of the skin
·
Irritation
of the eyes
both of which are transitory conditions.
There is no known incidence of carcinoma
occurrence from direct radiation.
Verification statements are included from the
following entities:
Department of Health Education and Welfare
Environmental
Protection Agency
General Electric
Manual
American Medical
Association
American
Institute of Baking
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Frankfort, IL. 60423
Ph. 815-469-3301 Fax 815-469-1438
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