IS UV LIGHT GENERATED?
UV Arc Tube, a quartz tube similar to a fluorescent strip
light, is filled with and inert gas, which provides the initial
discharge and the means of exciting the minute amount of mercury
present. A Low Pressure glow discharge produces a line spectrum
at 185.0 and 253.7 nm.
the current is increased, the Arc Tube heats up rapidly, the
pressure increases and produces the typical Medium Pressure
spectrum shown in fig 1. It is a complex combination of spectral
lines, continuum and absorption lines. Fig1 shows:
the position of UV-C in the electromagnetic
UV absorption curve of DNA
outputs of Low and Medium Pressure electrical
discharge lamps and arc tubes
1 also compares the spectrum from the Medium Pressure Arc
Tube with the germicidal effectiveness curve, and shows that
the Arc Tube produces a powerful bactericidal dose of UV across
the desired waveband. Hanovia offers both Low and Medium Pressure
technology and will advise which is appropriate according
to the application.