Our UV systems employ a low pressure mercury vapour discharge lamp surrounded by a water jacket whose inner wall is made from a special UVC-transparent quartz material. The Lamp Produces a very strong spectral line at 254nm in the shortwave region, which is the waveband most lethal to micro organisms.
The UV light shines powerfully through water passing along the unit. Destroying the cell DNA (or RNA in the case of viruses) making the micro organisms inactive.
We use a stainless steel water chamber maximising full use of the available ultra-violet energy, resulting in long exposure times and high doses and minimising UV light absorption into the chamber wall.