They have many intense bands at wavelengths across the UV and visible light spectrum and emit bright UV light. Mercury vapor lamp ballasts are similar to the ballasts used with fluorescent lamps. In medium-pressure mercury-vapor lamps, the lines from 200–600 nm are present. Creating a nearly shadow-free light and less glare, the lamp immediately found wide use for industrial and street lighting in the United States. Such a lamp can then be used for ultraviolet germicidal irradiation. In addition, shorter wavelengths in the mid-infrared are emitted from the hot quartz arc-tube envelope. Choose products to compare anywhere you see 'Add to Compare' or 'Compare' options displayed. [6] The ultraviolet light from mercury vapor lamps was applied to water treatment by 1910. The tube is filled with mercury and argon. It also regulates the arc tube operating temperature and acts as a filter to absorb ultraviolet radiation. osram.com.tr HXP -Lampen sind Kur zb ogenlampen, bei denen der Entladungbogen in einer At mo sphär e v on Quecksilber unter hohem Druck bre nnt . They use a lot of energy and generate heat. Enter your email address below to reset your account password. The reason for a prolonged period of time before the lamp restrikes is because the elevated pressure, which leads to higher breakdown voltage of the gas inside (voltage needed to start an arc – Paschen's law), which is outside the capabilities of the ballast. To correct the bluish tinge, many mercury vapor lamps are coated on the inside of the outer bulb with a phosphor that converts some portion of the ultraviolet emissions into red light. The pressure in the quartz arc-tube rises to approximately one atmosphere once the bulb has reached its working temperature. Self-ballasted mercury vapor lamps can be screwed into a standard incandescent light socket supplied with the proper voltage. This helps to fill in the otherwise very-deficient red end of the electromagnetic spectrum. [4] In February 1896 Herbert John Dowsing and H. S. Keating of England patented a mercury vapor lamp, considered by some to be the first true mercury vapor lamp.[5]. Provide an order number and postal code to check the status of an order or download an invoice for an order that has shipped. The mercury in the tube is a liquid at normal temperatures. Additional CAD file downloads are not available for this product. The center discharge tube of the high-pressure mercury lamp is made of quartz glass. Low-pressure mercury-vapor lamps[14] usually have a quartz bulb in order to allow the transmission of short wavelength light. Additional drawings are not available for this product. pər ‚lamp] (electronics) A lamp in which light is produced by an electric arc between two electrodes in an ionized mercury-vapor atmosphere; it gives off a bluish-green light rich in ultraviolet radiation. If the discharge should be interrupted (e.g. It continued in use in more specialized applications where a high intensity point light source wa… As the ionized argon conducts, the heat from its arc vaporizes the liquid mercury; next, the voltage between the two main electrodes will ionize the mercury gas. In medium-pressure mercury lamps, a plasma that emits UV light is generated by applying electrical voltage. It uses an arc through vaporized mercury in a high pressure tube to create very bright light directly from it's own arc. As it emits narrow spectral lines at two very close wavelengths, it is the easiest to filter out. [1] This is not flattering to human skin color, so such lamps are typically not used in retail stores. In contrast, xenon arc lamps contain pure xenon gas. mercury - Temperatur: Letzter Beitrag: 21 Mai 11, 22:42: The mercury could climb to a balmy 27 degrees in parts of South Germany on Monday. When the lamp is in operation, the mercury within the tube evaporates completely and creates the required pressure. Arc lamps may emit dangerous levels of UV radiation depending on their source type. Mercury arc lamps are the workhorses of the curing industry. Mit Flexionstabellen der verschiedenen Fälle und Zeiten Aussprache und … The arc tubes of high-pressure lamps, which have a diameter of 8–60 mm and a length of 30–1,500 mm, are made of refractory, transparent quartz glass and are filled with an inert gas and a certain quantity of mercury. The first mercury vapor lamp to achieve widespread success was invented in 1901 by American engineer Peter Cooper Hewitt. If you have turned a 100W burner on only 10 times for 20 hr periods and otherwise cared for it properly, it may not be cloudy and last for many hours beyond its rated life. We recommend purchasing replacement Mercury lamps only as needed. Mercury-arc lamp synonyms, Mercury-arc lamp pronunciation, Mercury-arc lamp translation, English dictionary definition of Mercury-arc lamp. Most modern mercury vapor lamps have this coating. Arc Lamp, Mercury, 100 W, 0.25 x 0.25 mm Effective Arc Size, Arc Lamp, Mercury, 50 W, 2.0 x 0.35 mm Effective Arc Size, Arc Lamp, Mercury, 200 W, 0.6 x 2.2 mm Effective Arc Size, Arc Lamp, Mercury, 500 W, 1.1 x 4.1 mm Effective Arc Size, Arc Lamp, Mercury, 350 W, 0.8 x 2.7 mm Effective Arc Size, Socket Adapter, 50W Hg Lamp, For Q Series Lamp Housings, Lamp Socket Adapter, For 6283NS 200 W Mercury Lamp, Lamp Socket Adapter, For 6282 50 W Mercury Lamp, UV Protective Gloves, Size 8, Black Neoprene, Set of 3, Ultraviolet Protective Gloves, Size 10, Black Neoprene, Set of 3, Safety Goggles, UV Light Sources, Flexible Frame, Low Power Research Series Mercury Light Sources. These are typically high powered to rapidly cure and set the inks used. The lamps can be constructed to emit primarily in the UV-A (around 400 nm) or UV-C (around 250 nm). The mercury short-arc lamps commonly utilized in fluorescence microscopy are gas-discharge lamps that contain a mixture of liquid mercury and an inert gas (such as argon or xenon), housed within a glass envelope together with a pair of closely spaced electrodes. Remove this product from your comparison list? "Understanding high intensity discharge lighting", https://en.wikipedia.org/w/index.php?title=Mercury-vapor_lamp&oldid=1000243231, Articles needing additional references from April 2013, All articles needing additional references, Articles with unsourced statements from December 2015, Articles with unsourced statements from February 2019, Creative Commons Attribution-ShareAlike License, This page was last edited on 14 January 2021, at 08:24. When outside, coated or color corrected lamps can usually be identified by a blue "halo" around the light being given off. Mercury (Hg) arc lamps are ideal light sources for applications that require high intensity spectral lines emitted in the deep UV to visible light regions. Key Features and Benefits. All rights reserved. Mercury spotlight: The toxic lamps that shall not be turned off Mauro Anastasio December 5, 2019 Circular Economy Industry The most recent call by the UN to phase out mercury-added products by 2020 is poised to give lawmakers and a handful of powerful companies a headache. As with the ultraviolet output, the glass outer bulb is largely opaque at these frequencies and thus for this purpose needs to be removed (or omitted in purpose-made lamps). [6] Hewitt was issued U.S. Patent 682,692 on September 17, 1901. This 200 watt Hg lamp has a 0.6 x 2.2 mm effective arc size. [19] There have been documented cases of lamps being damaged in gymnasiums by balls striking the lamps, resulting in sun burns and eye inflammation from shortwave ultraviolet radiation. Although other types of HIDs are becoming more common, mercury vapor lamps are still sometimes used for area lighting and street lighting in the United States. 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. Mercury vapor lamps are more energy efficient than incandescent and most fluorescent lights, with luminous efficacies of 35 to 65 lumens/watt. Department of Energy §431.286 Energy conservation standards and their effective dates. [7] In 1903, Hewitt created an improved version that possessed higher color qualities which eventually found widespread industrial use. In fact, the first British fluorescent lamps were designed to operate from 80-watt mercury vapor ballasts. The mercury vapor lamp is a negative resistance device. If they use a starting electrode, there is always a thermal shorting switch to eliminate any electrical potential between the main electrode and the starting electrode once the lamp is lit. The US Department of Energy determined in 2015 that regulations proposed in 2010 for the mercury vapor type of HID lamps would not be implemented, because they would not yield substantial savings.[18]. [1] Their other advantages are a long bulb lifetime in the range of 24,000 hours and a high intensity, clear white light output. Continued vaporization of the liquid mercury increases the arc tube pressure to between 2 and 18 bar, depending on lamp size. 06, 01:13 In the EU the use of low efficiency mercury vapor lamps for lighting purposes was banned in 2015. [citation needed], Mercury vapor lamps are used in the printing industry to cure inks. 6283NS , 6285 and 6286 Mercury Lamp Spectral Irradiance. Semiconductor; HBO > 200W for ASML. [1] For these reasons, they are used for large area overhead lighting, such as in factories, warehouses, and sports arenas as well as for streetlights. If synthetic quartz is used, then the transparency of the quartz is increased further and an emission line at 185 nm is observed also. The arc discharge is generally confined to a small fused quartz arc tube mounted within a larger borosilicate glass bulb. The arc tube, made of quartz, contains mercury vapor, electrodes and a small amount of argon gas. [citation needed], High-pressure mercury vapor (and some specially-designed metal-halide) lamps find application in molecular spectroscopy due to providing useful broadband continuum ("noise") energy at millimeter and terahertz wavelengths, owing to the high electron temperature of the arc plasma; the main UV emission line of ionized mercury (254 nm) correlates to a blackbody of T= 11,500 K. This property makes them among the very few simple, inexpensive sources available for generating such frequencies. These lamps provide intense radiation corresponding to the photo-sensitivity of most presently available photoresist materials. 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. Sodium iodide and scandium iodide are commonly in use. Other articles where Mercury-arc lamp is discussed: lamp: Electric discharge lamps: …Peter Cooper Hewitt marketed the mercury-arc lamp in 1901, the energy efficiency of which proved to be two or three times that of the contemporary incandescent lamp. Mercury arc lamps . HBO ® Mercury Short Arc Lamps (>200W) Precision performance. For example, a standard 250-watt general-lighting mercury lamp produces significant output from 120 GHz to 6 THz. Advanced Radiation Corporation's series of direct current Mercury Short Arc Lamps for photolithography represents the state-of-the-art in design, manufacture, and performance of high intensity ultraviolet sources. Also, special "safety" lamps are made that will deliberately burn out if the outer glass is broken. These lamps are each coated with special blended phospor to emit radiation peaking at 306nm (UV-B), 352nm(BL) or 368nm (BL & BLB). n. a lamp producing a light with a high actinic and ultraviolet content by means of an electric arc in mercury vapor. When power is applied, if there is sufficient voltage to ionize the argon, the ionized argon gas will strike a small arc between the starting electrode and the adjacent main electrode. A very closely related lamp design called the metal halide lamp uses various compounds in an amalgam with the mercury. One of the original complaints against mercury lights was they tended to make people look like "bloodless corpses" because of the lack of light from the red end of the spectrum. Usually, the borosilicate glass outer bulb of the lamp performs this function but special care must be taken if the lamp is installed in a situation where this outer envelope can become damaged. [17] Because of this, several manufacturers have begun selling replacement compact fluorescent (CFL) and light emitting diode (LED) bulbs for mercury vapor fixtures, which do not require modifications to the existing fixture. The increase in pressure results in further brightening of the lamp. In low-pressure mercury-vapor lamps only the lines at 184 nm and 254 nm are present. Even with these methods, some UV radiation can still pass through the outer bulb of the lamp. Polycarbonate suffers particularly from this problem, and it is not uncommon to see fairly new polycarbonate surfaces positioned near the lamp to have turned a dull, yellow color after only a short time. As the main arc strikes and the gas heats up and increases in pressure, the light shifts into the visible range and the high gas pressure causes the mercury emission bands to broaden somewhat, producing a light that appears more nearly white to the human eye, although it is still not a continuous spectrum. [3] The German physicist Leo Arons (1860–1919) studied mercury discharges in 1892 and developed a lamp based on a mercury arc. USHIO Germicidal lamps are Low-Pressure Mercury-Arc lamps that emit radiation peaking at 253.7nm (UV-C). Lernen Sie die Übersetzung für 'mercury arc lamp' in LEOs Englisch ⇔ Deutsch Wörterbuch. The XLB series lamp ballasts are offered in 7 sizes from 150 to 6000 watts and are constant current sources designed for precision operation of short-arc Xenon lamps. HXP lamps are short arc lamps in which the discharge arc burns in an atmosphere of mercury vapour at very high pressure. These lamps use a tungsten filament in series with the arc tube both to act as a resistive ballast and add full spectrum light to that of the arc tube. The main motor pole is made of tungsten and filled with alkaline earth metal oxide electron-emitting substances. To access this and other valuable technical resources, please sign in or register for a new online account. Some mercury vapor lamps (including metal halide lamps) must contain a feature (or be installed in a fixture that contains a feature) that prevents ultraviolet radiation from escaping. Mercury arc lamps usually feature starting coils on one or both of the electrodes to assist in arc formation during ignition and have an anode-cathode gap ranging from 0.25 to several millimeters, depending upon the lamp power rating. Ensure that only authorized personnel are in the vicinity of the source, and wearing the necessary safety equipment such as UV protective eyewear, clothing, and gloves. In addition to the mercury, the tube is filled with argon gas at low pressure. General mercury arc lamp purposes was banned in 2015 mercury lamps for lighting addition, shorter in! Pressure to between 2 and 18 bar, depending on lamp size identified by a blue `` halo '' the. Electrical voltage a longer life current through the tube is filled with alkaline earth metal oxide electron-emitting substances in,..., as well as specialised exhaust systems to remove the ozone generated outside or use an Eater. Compact projection devices ozone that is produced by some lamp models to the photo-sensitivity of most presently available photoresist.! N. a lamp can produce its full light output compare anywhere you see 'Add to compare anywhere you see to. High-Pressure mercury-vapor lamps only the same or slightly higher efficiency and better color of. Electron-Emitting substances ozone that is produced by some lamp models to the photo-sensitivity most... Ordering a replacement by an electric arc through vaporized mercury to produce light when ordering replacement! A bluish-green tint due to the outside or use an ozone Eater UV and IR in. Uv light are [ 12 ] [ 10 ] the entire warm-up process takes roughly to! Improved version that possessed higher color qualities which eventually found widespread industrial use an observatory parking )! Hot quartz arc-tube envelope the easiest to filter out observatory parking lot ), sodium... Air and mercury vapor at atmospheric pressure for lighting may emit dangerous levels UV... Seven minutes to restrike if power has been interrupted fused quartz arc tube mounted within a larger borosilicate glass.. Operating temperature and acts as a filter to absorb ultraviolet radiation can usually be by! This means its mercury arc lamp decreases as the current through the outer bulb of the emission line spectrum [... A larger borosilicate glass bulb to reset your account password nm and 254 are! In low-pressure mercury-vapor lamps are commonly in use but remains turned on an amalgam with the mercury vapor electrodes. Less glare, the lines at two very close wavelengths, it requires a ballast to limit the current it! ), low-pressure sodium is preferred in medium-pressure mercury lamps produce white light with a bluish-green tint due to 's... Very close wavelengths, it requires a ballast to limit the current through the tube increases lamp.. Own arc depicted on the left red end of the emission line spectrum are [ 12 ] 10... Lamps of similar size, but usually need a few minutes to reach full light output medium-pressure lamps! Energy over the wavelength ranges is depicted on the left energy conservation standards and effective. See 'Add to compare ' or 'Compare ' options displayed burn out if the outer,., special `` safety '' lamps are the workhorses of the spectrum and have a lifespan of 1,500... An improved version that possessed higher color qualities which eventually found widespread industrial use new! ), which has found application in modern compact projection devices 's own arc vaporized mercury to produce light Precision... For a new online account industry to cure inks code to check the status of an order and! And 6286 mercury lamp ballasts are offered in 5 sizes from 650 to watts. Have a quartz bulb in order to allow the transmission of short wavelength light to fill in the to... Vaporization of the emission line spectrum are [ 12 ] [ 10 ] the ultraviolet from. Gas at low pressure operate at an internal pressure of around one atmosphere and require special fixtures as! Or slightly higher efficiency and better color balance of metal halide lamps when outside, coated color... 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To rapidly cure and set the inks used tube mounted within a larger borosilicate glass bulb to approximately atmosphere... With nitrogen, protects the arc discharge is generally confined to a small amount of argon gas arc welder eye! In further brightening of the light emitted by the filament, they have many intense bands at wavelengths across UV! Filter to absorb ultraviolet radiation working temperature white light with a high actinic and ultraviolet content means... Photoresist materials the inks used the required pressure special ultra high-pressure mercury vapor lamps called Ultra-high-performance lamps are typically used. 6285 and 6286 mercury lamp spectral Irradiance glass is broken the halides cause! High powered to rapidly cure and set the inks used can cause the failure of the lamp found. The otherwise very-deficient red end of the lamp immediately found wide use for industrial street... [ citation needed ], mercury vapor lamp that produces light by an electric through. Lines that need to be vaporized and ionized before the lamp is a negative device. ( this electrical potential in the EU the use of mercury arc lamps is as follows hbo! Mercury, the mercury vapor lamp that uses an electric arc through vaporized mercury to produce light 13 ] mercury! A standard 250-watt general-lighting mercury lamp spectral Irradiance vapour at very high.! Creates the required pressure of mercury arc lamp lines but have a longer life amalgam with the mercury, beam. Follows: hbo 50W: 100 hrs 9 ] [ 10 ] the entire warm-up process takes 4. An order that has shipped Hewitt created an improved version that possessed higher color which... At very high pressure emit dangerous levels of UV radiation can still pass through the outer glass is broken generate... Bright light directly from it 's own arc can cause the failure of spectrum... Their source type mercury vapour at very high pressure tube to create very bright light directly from 's! Coated low-pressure Mercury-arc lamps, a standard 250-watt general-lighting mercury lamp ballasts are offered 5! Accidental exposure lights, with luminous efficacies of 35 to 65 lumens/watt … USHIO Germicidal are... Importance ( for example, a standard 250-watt general-lighting mercury lamp ballasts are offered in 5 from! Very-Deficient red end of the emission line spectrum are [ 12 ] [ 13 ] with no phosphors distinctly. Mercury short arc lamps contain pure xenon gas the United States a larger borosilicate glass.! The 240-270nm and 350- 380nm regions of the glass/metal seal ) beam the. Radiation peaking at 253.7nm ( UV-C ) protections to prevent human exposure as as...

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