Lamp Technology
ETS uses medium pressure lamps with a polychromatic output to remove nuisance mono-, di- and tri- chloramine species. Medium Pressure lamps with their high output are not affected by changes in water temperature.
Medium pressure lamps are polychromatic and unlike low pressure lamps which have a peak output of 254nm, meduim pressure lamps have a broader output between 185 and 400 nm. DNA has its maximum absorbtion at 265nm. The optimum wavelength for destroying Cryptosporidium is 271nm. In addition, studies have shown that micro-organisms after exposure to low pressure UV have the ability to repair themselves. No such affect ocurred when exposed to Medium Pressure lamps.This is known as photo-reactivation.
Since the surface temperature of low pressure lamps is relatively low, the influence of pool water, especially spas and therapy pool water is significant. Medium pressure lamps with a higher surface temperature is not influenced by water temperature and can operate effectively in temperatures ranging from -20 Degrees Celsius to +80 degrees Celsius. In addition,they emit the wavelengths used to effectively remove chloramines from pool water.
Medium pressure lamps also have a small footprint and short arc length. e.g. Retrofits into existing small footprint facilities. Our UV monitors can be offered as NIST traceable devices , and fit into dry ports that permit reference monitors to be inserted without breaking a water seal to validate the lamp output. In all cases the sensor technology we use is specific to germicidal UV and blind to visible light and IR.
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