Multilamp apparatus

Multilamp apparatus are commercially available where between eight and 12 lamps are arranged in a circular fashion (40-60 cm diameter), with room inside to accommodate the vessel in which the solution to be irradiated is contained. These were initially marketed by the Southern New England Ultraviolet Co. under the name of Rayonet, now the name is often used for similar devices by other companies. These units are fitted with a fan which maintains the temperature below 40 °C otherwise, this might increase in such a confined space (see Figure 1.2). 

Figure 1.2 Multilamp apparatus fitted with low-pressure mercury lamps and a rotating merry-go-round that ensures the uniform illumination of several test tubes. Alternatively, test tubes or other vessel(s) containing the solution to be irradiated can be accommodated.

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