Producing ozone by means of a low pressure mercury discharge is still limited by such economical and technical factors as efficiency and lifetime of Low Pressure Mercury Lamps (LPMLs). With the introduction of a new "long life coating" technology for LPMLs at Heraeus, these lamps show up as an effective and reliable VUV-light source that can be used in ozone generation. Different coating technologies are compared in terms of radiation losses in the coating and depreciation of the mercury resonance line at λ = 185 nm. The parameters of new ozone generating lamps are presented. A simple model with consideration of both the resonance lines at λ = 185 nm and λ = 254 nm for a practical calculation of ozone concentration in an air flow is proposed.
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