UV-C Lamps that Contribute to the Production of Ozone (Ozone Producing UV-C Lamps)

UV-C Hg lamps that contribute to the production of ozone (O3) are used in applications involving disinfection of water and air. Ozone (O3), itself, is a highly oxidizing agent and is very unstable with a short half-life.

The glass envelope of a UV lamp is made of a fused quartz silica material or doped quartz glass which allows the 253.7nm or 254nm [Ultraviolet Germicidal Irradiation (UVGI)] wavelength radiation to penetrate (pass through) and escape from the glass envelope. The 185nm ozone (O3) producing wavelength (vacuum-UV radiation) which is also generated by the UV-C lamp is blocked and is not allowed to escape or penetrate through the glass envelope thereby not allowing the production of ozone (O3). Therefore, low pressure mercury (Hg) discharge (arc) lamps with doped quartz glass do not contribute to the production of ozone (O3).

With ozone producing UV-C lamps, the lamp envelope is made of a clear fused quartz material (is not doped) which allows the 185nm wavelength to escape or penetrate through the glass envelope. This wavelength radiation then reacts with the surrounding oxygen (O2) molecules in the air thereby producing ozone (O3). Splicing two types of quartz material together can result in a UV lamp that produces a varying amount of ozone (O3). Our ozone producing lamps can be ordered in varying amounts of ozone, i.e., 20% ozone or 50% ozone producing.

by Bill Himaras

Aug 12th, 2021