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Water Lecture 3 A. Disinfection B. Water Safety Plans - page 34 / 47

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Low and Medium Pressure UV Technologies

Low Pressure UV

monochromatic (254 nm)

temp: 40 - 60 °C

88-95% output at 254nm

low intensity output

Medium Pressure/Pulsed UV

polychromatic

temp: 400-600/15,000 °C

output over germicidal range

high intensity output

100

200

300

400

500

600

700

800

900

1000

Ultraviolet

Visible

Near Infrared

vacuum

far

near

v    b     g    y  o

red

Wavelength (nm)

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