A lowpressure mercuryvapor lamp has a characteristic emission line at 253 nm. High efficiency and good color rendition make this type of traditional lamp an ideal. Mercuryvapor lamp an overview sciencedirect topics. These lamps have an operating lifetime of up to 12,000 hours and convert up to 40% of the lamps electrical power into uvc, offering an efficient and costeffective alternative to medium. A mercuryvapor lamp is a gas discharge lamp that uses an electric arc through vaporized. Medium pressure mercuryarc ushio produces standard and custom uv emitters. High pressure mercury lamps 400w buy mercury vapour. Our production facility is designed to meet specific customer requirements to produce customized oneoff lamps, as well as achieve consistent quality in mass production. Figure 614 shows the basic configuration of a hid lamp. Rather than a cold spot, the lamps amalgam spot on pellet regulates mercury vapor pressure during operation and yields up to three times the uvc output of a standard low pressure mercury lamp of the same length. Similar to highpressure mercury lamps or high pres.
Oct 14, 2014 lamp that produces light as a result of an electrical discharge, generated between two electrodes, in a high pressure mercury vapor that is contained in a transparent bulb. The electric current excites the mercury vapor in the tube, generating radiant energy, primarily in the. Lamps low pressure mercury discharge the most common form of germicidal lamp looks similar to an ordinary fluorescent lamp but the tube contains no fluorescent phosphor. Lamp matrix highpressure sodium lamps highpressure sodium lamps, 50 1,000 w osram u ign 2. A common discharge lighting luminary for use in an office environment would typically be a low pressure mercury vapour electronic discharge fluorescent lamp. It needs to be vaporized and ionized before the lamp can produce its full light output. It now offers one of the biggest infrared and uv portfolios with. In these lamps, a material, such as sodium, mercury, or metal halide, is added to the arc tube. The top countries of suppliers are china, taiwan, china, from which the percentage of 300w high pressure mercury lamp supply is 97%, 2%. Mercury vapor technology was developed throughout the 1800s in england and germany. A wide variety of 300w high pressure mercury lamp options are available to you, such as 220v, 380v. Assessing the risk of mercury in drinking water after uv lamp breaks page 2 ionize the mercury, and as an effect, produce uv light. Aquafine amalgam lp lamps combine mercury with another element. China high pressure mercury lamp, high pressure mercury lamp.
I and u can be applied to determine the lamp pressure in normal uhp lamps by a simple measurement of, i. Tungsten, oxygen and halogen atoms combine at the bulbwall to form tungsten. Generally speaking, inorganic mercury compounds are not easily absorbed by the human body. A thin coating of phosphor or a blend of phosphors on the inside of the bulb wall is excited by the mercurys uv. Mercury vapour pressure is typically around ten atmospheres. This is different from fluorescents which use the mercury vapor arc to create a weaker light that mainly creates uv light to excite the phosphors. The luminous efficacy of any discharge lamp falls as wattage is reduced. Standard high pressure mercury lamp product data general characteristics capbase e40 bulb ed120 ed 120mm bulb material hard glass bulb finish coated operating position any any or universal u life to 5% failures 6000 hr life to 20% failures 12000 hr life to 50% failures 16000 hr lsf em 2000h rated, 12h cycle 99 % lsf em 4000h rated. This gives a typical diffuse mediumpressure uv spectrum see figure 3.
Be sure to consider all the options you might be able to find such as outdoor light, mercury lamp. See the photos lower on this page for more details. What is the difference between a 500w high pressure mercury. By this acquisition, the company strengthened its halogen production with high speed machines. High pressure metal halide lamps high pressure sodium. Mercury vapor pressure does the mercury vapor pressure affect uv output in amalgam lamps. Lowpressure sodium lampsproducing up to 180 lumens per watthave the highest efficacy of all commercially available lighting sources. Even with low intensity uv sources, cures can be obtained quickly. Hach replacement uv for toc analyzers, arc imaging, chromatography, photochemistry, calibration of uv detectors, calibrations of spectrophotometer, and more. Lamp that produces light as a result of an electrical discharge, generated between two electrodes, in a high pressure mercury vapor that is contained in a transparent bulb. A lowpressure mercury lamp lp hg lamp is a highly efficient uv light source of short wavelength. Assessing the risk of mercury in drinking water after uv.
Investigating the spectrum of a high pressure mercury lamp. Ushio germicidal lamps are low pressure mercury arc lamps that emit radiation peaking at 253. Low pressure mercury lamps have been manufactured in jelight company inc. The mercury used in these lamps is an inorganic mercury compound. What is the difference between a 500w high pressure. Fit a lens f 50 mm in the tilting rider and set it up about 10 cm from the lamp.
High pressure metal halide lamps high pressure sodium lamps. In this process, there is a potential for lamp breaks to occur, in which case mercury can be released and enter the distribution system. The lamp works by creating an electric arc through vaporized sodium metal. The arc discharge is generally confined to a small fused quartz arc tube mounted within a larger borosilicate glass bulb.
What is the difference between a 500w high pressure mercury lamp and a 400w high pressure mercury lamp. No solvents or other volatiles are released during the curing process. Again transition of the electrons requires least amount of input energy from a colliding electron. When low pressure lp lamps receive the proper voltage and current from the ballast, an arc is struck from one end of the lamp to the other. Rohs will ban high pressure mercury vapour lamp hpmv.
Standard high pressure mercury lamp product data general characteristics capbase e27 bulb bf70 bf 70mm bulb material soft glass bulb finish coated operating position any any or universal u life to 5% failures 6000 hr life to 20% failures 0 hr life to 50% failures 16000 hr lsf em 2000h rated, 12h cycle 99 % lsf em 4000h rated, 12h. Mercury vapor lamps are highintensity discharge lamps that predate modern high pressure sodium and metal halide lamps. This was not achieved so far by technologies like highpressure mercury lamps or sodium. Other materials and gases are used to help start the lamp or control its color. A common discharge lighting luminary for use in an office environment would typically be a lowpressure mercury vapour electronic discharge fluorescent lamp. The development by general electric of a sintered aluminum oxide material with magnesium oxide added to improve light transmission was an important step in construction of. Low pressure uv lamps alphacure uv lamp manufacturer.
Lamp number wattage lm base type 831026 150w 6000 e27 sontcom150w 831027 250w 9000 e40 sontcom250w 831028 400w 15000 e40 sontcom400w philips hid lamps master sont pia plus hg free high pressure sodium lamp with clear tubular outer bulb, long reliable lifetime and zero mercury. It may be necessary to incline the tilting rider a little. Measuring the pressure in ultrahighpressure mercury lamps. They have a germicidal efficiency of 30% and can operate on lower current between 180 and 425ma. The reason for the creation of this second category of mercury lamp was to allow the efficacy to be maintained as high as possible for low wattage sources. Yes, it surely does the pressure determines the number of excited mercury atoms and thus determines uv output. However, mercury vapor is harmful in any form, so if the lamp is broken or ruptures during use and any mercury vapor is inhaled, consult a physician immediately. Fluorescent lamp and working principle of fluorescent lamp. All credits and sources are located at the bottom of each lighting page. Even though they emit a yellow light, a lowpressure sodium lamp should not be confused with a standard highpressure sodium lamp, which is a high. Low pressure mercury lamp learn what goes into ours. Lowpressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor lighting, such as street lamps. Assessing the risk of mercury in drinking water after uv lamp. Ultraviolet uv light is found in the electromagnetic spectrum between visible light.
In addition, rather than being made of ordinary borosilicate glass, the tube is made of fused quartz or sodalime glass which allow the 185nm andor 253. The analysis of modern low pressure amalgam characteristics. A low pressure mercury lamp lp hg lamp is a highly efficient uv light source of short wavelength. Set up the highpressure mercury lamp roughly in the middle of the 1m optical bench.
Pdf wavelengths of spectral lines in mercury pencil lamps. A small amount of mercury is vaporized by this arc, causing ultraviolet emissions. A lowpressure sodium lamp is shown in the image below. Whats the difference between low pressure lp, amalgam low pressure. However, the first low pressure lamps were sold commercially in the united states in 1901 after john cooper hewitt innovated the lamp s color. There are 39 suppliers who sells 300w high pressure mercury lamp on, mainly located in asia. A sodiumvapor lamp is a gasdischarge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm two varieties of such lamps exist. The mercury vapor lamp is a high intensity discharge lamp. Lamp that produces light as a result of an electrical discharge, generated between two electrodes, in a highpressure mercury vapor that is contained in a transparent bulb.
A mercuryvapor lamp is a gas discharge lamp that uses an electric arc through vaporized mercury to produce light. Lowpressure amalgam lamps amalgam lamps use a mercury amalgam mix to control mercury vapor pressure. A mercury vapour lamp is a high pressure, electric arc discharge lamp that provides intense illumination over a selected range of wavelengths. If you are mainly looking for 2020 newest high pressure mercury lamp and high pressure mercury lamp factory, here you will find all the options you can ever have imagined. Low pressure mercury lamp in addition to the medium pressure mercury and led light sources, vapourtec also offer three low pressure mercury lamps. A low pressure mercury lamp is one of the most popular discharge lamps in labs, frequently used for wavelength calibration of optical measuring instruments and as a disinfection lamp to sterilize workspace and tools used in biology labs and medical facilities. It includes information on the total amount of mercury in all lamp products that were sold in the u. Within the tube are two electrode coils, one at either end. The lamps can be fitted with various types of end fitting from our catalogue, or equipped with customer special fittings, cables or pins. However, the first lowpressure lamps were sold commercially in the united states in 1901 after john cooper hewitt innovated the lamps color. The analysis of modern low pressure amalgam characteristics dafp. The lamps come in both standard and high output selections and are ozone free. Uv lamps from senlights crystec technology trading gmbh. A laboratory demonstration of a high pressure lamp was carried out in 1959.
Pdf measuring the pressure in ultrahighpressure mercury lamps. Electronic ballasts combine ignition component, com. It uses an arc through vaporized mercury in a high pressure tube to create very bright light directly from its own arc. In addition to the mercury, the tube is filled with argon gas at low pressure. Space constraints, highflow requirements low pressure medium pressure kw per lamp.
Classified as in the same group as fluorescent lamps or germicidal lamps, the main light emission is a 254nm line comprising an 185nm line of far shorter wavelength. However, regardless of other factors it is safe to say that there is a certain optimal pressure for each lamp. Softglass lamps are one of our quality low pressure mercury lamp products. Place the adjustable slit another 10 cm or so beyond it, in such a way that the slit is well illuminated. The operator can accept these or can override the automatic process by manual integration. Download the uv lamp technologies pdf 594 kb for further information, including. Low pressure mercury lamps produce monochromatic radiation at 254 nm wavelength which makes them ideal for disinfection and sterilisation applications. Dec 31, 2018 mercury vapour lamp december 31, 2018 february 24, 2012 by electrical4u in case of fluorescent lamp the mercury vapour pressure is maintained at lower level such that 60% of the total input energy gets converted into 253. High pressure mercury lamps 400w buy mercury vapour lamps. Hg pressures are usually above 20 mpa and difficult to measure. Ar at a low pressure and a few milligrams of metallic hg of.
The mercury in the tube is a liquid at normal temperatures. Warmup of a color corrected 80 w high pressure mercury vapor lamp to half brightness when a mercury vapor lamp is first turned on, it will produce a dark blue glow because only a small amount of the mercury is ionized and the gas pressure in the arc tube is very low, so much of the light is produced in the ultraviolet mercury bands. Philips medium pressure mercury lamps are available in a wide range of up to 180 w per centimeter, with an arc length between 10 and 140 centimeter. Two centuries of electric light source innovations pdf. In addition to the medium pressure mercury and led light sources, vapourtec also offer three low pressure mercury lamps. A common discharge lighting luminary for use in an office environment would typically be a lowpressure mercuryvapour electronic discharge fluorescent lamp. The uv source in low pressure mercury lamps and amalgam lamps that are. In some versions, fluorescent powder is applied that converts the ultraviolet part, which is emitted together with visible light, into visible light to improve the color. An electric current in the gas energizes mercury vapor which delivers ultraviolet radiation through discharge process and the ultraviolet radiation causes the phosphor coating of the lamp inner wall to radiate visible light.
A fluorescent lamp is a low weight mercury vapour lamp that uses fluorescence to deliver visible light. These offer specific wavelength emission and provide wavelengths not available with the medium pressure mercury or led light sources. We can also develop lamps tailored to new devices developed. Lamp matrix highpressure mercury lamps home tridonic. Designed by experienced engineers, and by using quality material in combination with a tightly controlled manufacturing process, we provide high quality lamps free of impurities to maintain strong and stable output throughout life of the lamp. I found that rohs restriction of hazardous substances directive of eu will prohibit use of high pressure mercury vapour lamp hpmv since 4. Mercury use in lighting this fact sheet summarizes the use of mercury in lighting devices, such as fluorescent lamps, high intensity discharge hid lamps e. A mercury vapour lamp is a highpressure, electric arc discharge lamp that provides intense illumination over a selected range of wavelengths. Pdf the wavelengths of 19 spectral lines in the region 253579 nm emitted by hg penciltype.
In case of fluorescent lamp the mercury vapour pressure is maintained at lower level such that 60% of the total input energy gets converted into 253. The range of lights manufacturers,wholesalers we represented is extensive. Mercury vapor lamps are highintensity discharge lamps that predate modern highpressure sodium and metal halide lamps. The outer bulb may be clear or coated with a phosphor.
Jointly developed with device manufacturers in response to their increasingly diverse needs, these lithographic uv lamps have earned high acclaim as well as user trust. Ultrahigh pressure uhp mercury lamps are important as highbrightness light sources for digital projection. The quartz material used in mercury discharge lamps was corroded by high pressure sodium vapor. China high pressure mercury lamp, high pressure mercury. They produce light when an electric current passes between two electrodes also called cathodes in a tube filled with low pressure mercury vapor and inert gases, such as argon and krypton. All highintensitydischarge lamps produce light from an arc tube that is usually contained in an outer glass bulb.1051 599 1404 513 759 1192 217 155 587 847 180 1453 1270 60 439 1459 469 613 472 418 28 1063 1415 20 186 717 1290 476