The low pressure uv lamp is only capable of producing lines at 185nm and 254 nm.
Medium pressure uv lamp wavelength.
The distribution of energy over the wavelength ranges is depicted on the left.
Operating at higher temperatures and pressures allow for an increased power density of roughly 1 5 4x of a lower pressure lamp per unit of arc length.
Medium pressure mercury arc ushio produces standard and custom uv emitters.
Roughly 35 of the electrical energy imparted into the lamp becomes uv c energy of the 254nm wavelength.
In medium pressure mercury vapor lamps the lines from 200 600 nm are present.
The uv lamp never contacts the water.
An increase in the current supplied would cause the uv lamp to rapidly heat up thus increasing the mercury pressure to produce the typical medium pressure spectral output shown in diagram 2.
Our production facility is designed to meet specific customer requirements to produce customized one off lamps as well as achieve consistent quality in mass production.
Fused silica is used in the manufacturing to keep the 184 nm light from being absorbed.
Quartz germicidal uvc lamps can produce both 254nm wavelength killing wave and 185nm wavelength ozone.
Unlike most other uv sources the medium pressure lamp mpl has a polychromatic spectral distribution from 190 nm up to the infrared spectrum.
The medium pressure lamp emits its radiant energy between 250 and 350 with many energy spikes in between most notably around 320 which is more in the uvb range with a uvc efficiency around 7 15.
It is either housed in a quartz glass sleeve inside the water chamber or mounted externally to the water which flows through the transparent uv tube.
This photolysis process has a lot of application in pools reduction of combined chlorine and process water de chlorination de ozonation toc reduction.
The emission peak of the mercury electron transition within these low pressure hot cathode uv lamps is fixed in both energy and wavelength.
Uvc maintenance over the life of the lamp is much higher over the life of the lamps.
In such a spectrum there are separate discrete points of increased intensity so called spectral.
Wavelength nm spectrum uv medium pressure lamp gallium doped relative spectral intensity distribution nm uv medium pressure lamps emit a so called discontinuous spectrum or line spectrum graphic 4 during operation.
