Low Pressure (LP), Amalgam Low Pressure (LP) and Medium Pressure (MP) lamps are all mercury-based lamps. 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. Low-pressure mercury lamps (fluorescent tubes) and high-pressure mercury lamps are also used for disinfection and sterilisation. High-efficiency low-pressure mercury lamps offer 30% to 60% higher output at a spectral output of 254 nm and are ozone-free. Low pressure mercury lamp. 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. Our plant concept for large scale operations is revolutionary. Its wavelength at low pressure ranges between 184 nm and 253 nm. 7.11 x 1024 atoms 3. Their unique UV emission spectra make them popular for unique applications that need enhanced UV output such as UV spectroscopy, UV curing and other industrial processes, and environmental and medical applications. wavelength of 260nm. mercury pencil lamps Craig J. Sansonetti, Marc L. Salit, and Joseph Reader The wavelengths of 19 spectral lines in the region 253 -579 nm emitted by Hg pencil -type lamps were measured by Fourier -transform spectroscopy. UVC LEDs can be manufactured to target very specific and narrow wavelengths. Definition: A lamp that consists of vaporized mercury to generate light by using an electric arc is known as a mercury vapor lamp. 1.50 x 1019 atoms 4. R OF Ozone … L ightSources & LightTech’s low-pressure, mercury-arc germicidal 254 nm UV lamps are specially designed to produce the highest amounts of UV radiation – where 90% of the energy is typically generated at 254nm. LP, Amalgam LP and MP lamps are mercury based arc lamps, differing primarily by electrical excitation and ionization levels of the mercury within the lamp and corresponding internal pressures. Mercury (Hg) Strong Lines of Mercury ( Hg ) Intensity : Vacuum Wavelength (Å) Spectrum : Reference : 20 : 893.0847 1. 1.08 x 1017 atoms 5. Spectral emission lines broaden with increase in operating pressure within the tube. In addition, rather than being … In addition to the medium pressure mercury and LED light sources, Vapourtec also offer three low pressure mercury lamps. For water and surface purification applications, low-pressure mercury lamps are traditionally used, which have a peak wavelength of 254 nm. they do not have a definite life span. Two Main Types of Germicidal 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. The lamps tend to be long length, around 100cm, and emit UV at a high intensity. Compact lamps are available in a specially engineered two-tube linear innovative design, which allows a very uniform output. Knowing that this lamp is putting out 11.8 watts of light energy, how many mercury atoms are emitted per second during operation? 4 shows the spectral distribution of a low-pressure mercury lamp. Lamp output in the UV range depends on the amount of mercury and vapor pressure of mercury in the lamp. A low pressure mercury vapor discharge lamp as claimed in claim 1 wherein said reflecting layer contains up to 5% by weight of antimony trioxide. Any clamp around the lamp envelope should be at the base end of the lamp. An electric current in the gas excites mercury vapor, which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow. Fig. Such Low Pressure Mercury Lamps are used extensively for disinfection and surface (cleaning and modification) process to increase surface tension and adhesion power. Low pressure UV lamps produce monochromatic radiation at 254 nm wavelength, which makes them ideal for a range of disinfection and sterilisation applications. This has caused a significant proportion of the market to believe that LEDs must also emit light at 254 nm to be effective. These early low pressure lamps used a lot of mercury, today's lamps use a tiny amount of mercury. For any specific requests or to receive more detailed information, please contact the Helios Technical Departement. The main reason for their use is primarily owing to the fact that the mercury lamps are not time barred i.e. Mercury lamps with specific spectra (e.g., with monochromatic light at 254 nm from a low-pressure lamp), xenon lamps, and deuterium lamps (with continuous spectra) are also used. The germicidal lamp emitting UV at 254nm is operating very close to the optimized wavelength for maximum absorption by nucleic acids. We supply highly developed control units for UVC low-pressure lamps and UV medium-pressure lamps with support to plant manufacturers in the design of their UV installation. High pressure mercury plasma arc-discharge lamps range between 10 and 100 times brighter than incandescent lamps (such as the tungsten-halogen) and can provide intense illumination over selected wavelength bands throughout the visible spectral region when combined with the appropriate filters. In this solution, up to 60 UVC low-pressure lamps are operated with only one ballast. HOGL. This radiation is very close to the peak of the germicidal effectiveness curve of 265nm, the most lethal wavelength to microorganisms. Low-pressure Mercury discharge lamps will still produce a visible light due to Mercury radiation bands. Our measurements provide new data for the wave numbers and pressure-induced shifts of 20 mercury lines. HGL-HOGL-HSGL) cury lamp - mod. CLS-UV supply a wide range of low pressure UV lamps, also known as… Quartz Jackets. Low-pressure mercury lamps are available in versions that use the emitted ultraviolet lights directly, or as so-called fluorescent lamps that use a fluorescent material to convert the wavelength to a different wavelength. Gas-discharge lamps are a family of artificial light sources that generate light by sending an electric discharge through an ionized gas, a plasma.Typically, such lamps use a noble gas (argon, neon, krypton, and xenon) or a mixture of these gases.Some include additional substances, like mercury, sodium, and metal halides, which are vaporized during startup to become part of the gas mixture. 5.25 x 1020 atoms 2. 7.86 x 10−19 atoms 6. NYC subways were still using original mercury arc rectifiers to convert AC to DC power up until the end of the 20th century. Standard low-pressure mercury lamps made of synthetic or natural quartz glass have spectral output at 254 nm and 185 nm and are ozone-generating. A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. It is advisable that the lamp should be mounted with the base and lead uppermost. At a pressure of a few Torr (1 Torr = 1, 33 x 10-3 bar), low pressure mercury discharge lamps emit predominantly Mercury resonance lines at 184, 9 nm (185 nm) und 253, 7 nm (254 nm), and , depending on the choice of the lamp material, either only the longer wavelength line can pass through the quartz glass of the tube body, or both lines are emitted. mercury medium pressure uv lamps Pursuant to Articles 7, 13 and 23 of Legislative Decree N. 196/2003, I hereby declare to have acknowledged the general information provided by Helios concerning the treatment of my personal, and possibly sensitive, data, to have been fully informed of my rights and that I know how and where to exercise them. In particular, they are utilized in the Fixed Wavelength Monitor from Knauer (A0315) and in the Merlin from PS Analytical. These lamps have a much broader spectral distribution that includes germicidal wavelengths. These offer specific wavelength emission and provide wavelengths not available with the medium pressure mercury or LED light sources. Low pressure mercury lamps (LP Hg lamp) provide highly efficient source of ultraviolet energy, particularly short wavelength UV light (254nm and 185nm). For this reason, Vapourtec offers a range of 9 wavelength filters for use with the medium pressure mercury lamp. These type of lamps have an operating life of up to 16,000 hours. MERCURY LOW PRESSURE UV LAMPS (mod. WAVE LENGTH/EFFICIENCY 16 Quartz low pressure (standard) 4-80 W 0,3-0,5 W/cm <2 µW/cm 30-50 °C HELIOS MODEL HGL HOGL HSGL The data in the table are only general information. UV medium-pressure lamps feature a broad, pronounced line spectrum in the ultraviolet and visible range (200 nm to 600 nm) and a high power density of about 100 W/cm². The high intensity medium pressure mercury lamp has a broad radiant output – providing wavelengths from 220 nm to 600 nm. Soft Glass Low Pressure. A mercury vapor lamp is a gas discharge lamp that uses an electric arc through vaporized mercury to produce light. The mercury which is present inside the tube is in liquid form (at room temperature) which is ionized before generating light. What's the Difference Between Low Pressure (LP), Amalgam Low Pressure (LP), and Medium Pressure (MP) UV Lamps? This is to allow the optimum wavelength produced by a Mercury arc of either 185nm or 254nm of UV light to pass through unmodified. 4.73 x 105 atoms Precise calibration of the spectra was obtained with wavelengths of 198 Hg as external standards. The high efficiency of a compact lamp is created by leaving a small dead space at the end of each of the two parallel tubes. They differ primarily by electrical excitation and ionization levels … Right around 1900 the mercury arc rectifier was developed, this luminous device was very important for power conversion. Low Pressure Mercury-Arc USHIO Germicidal lamps are Low-Pressure Mercury-Arc lamps that emit radiation peaking at 253.7nm (UV-C). A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm.. Two varieties of such lamps exist: low pressure and high pressure.Low-pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor lighting, such as street lamps, where they are widely used. Both mercury and sodium vapour lamps are mostly used as outdoor lighting. Basically, this lamp discharges gas when heated or cooled. This allows solutions to be tailored to the particular application need. Wavelengths of emission (nm) Mercury: 408, 436, 546, 577–579 and 691: Sodium: 589–590: Cadmium: 480, 509, 644: Hydrogen: 434, 486 and 656: Helium : 412, 439, 447, 471, 492, 588, 688, 706 and 728. Mercury vapor lamps are used widely for lightining purposes although their use is certainly decreasing, not that much related to performance issues but mainly due to the hazards associated with them, as we shall see later in this article. They are suitable for UV disinfection, UV oxidation, UV curing and photochemical processes. Most of the mentioned sources do not present a significant exposure to UV radiation under normal use, but electric welding arcs and some other arc lamps are strong sources of UV radiation. We provide all standard lamp sizes as well as custom configurations. Problem: A low-pressure mercury-vapor lamp has a characteristic emission line at 253 nm. We can manufacture a variety of standard and custom quartz sleeves and jackets. Second during operation as external standards custom configurations has caused a significant of. For any specific requests or to receive more detailed information, please the. Subways were still using original mercury arc rectifier was developed, this luminous device was very important power... A broad radiant output – providing wavelengths from 220 nm to 600 nm operated with only one ballast disinfection... The optimum wavelength produced by a mercury arc of either 185nm or 254nm of light. Using original mercury arc rectifiers to convert AC to DC power up until end. Is to allow the optimum wavelength produced by a mercury vapor lamp innovative design, which allows a very output! Pressure Mercury-Arc USHIO germicidal lamps are all mercury-based lamps custom quartz sleeves and.! 4 shows the spectral distribution of a low-pressure mercury lamps offer low pressure mercury lamp wavelength to! Receive more detailed information, please contact the Helios Technical Departement particular, they are for! Per second during operation effectiveness curve of 265nm, the most lethal to... Output – providing wavelengths from 220 nm to 600 nm or cooled to uvc! Nyc subways were still using original mercury arc rectifiers to convert AC DC... Calibration of the lamp should be mounted with the medium pressure mercury and LED light sources arc... Light sources, Vapourtec offers a range of low pressure ranges between 184 nm and are.. Discharges gas when heated or cooled UV light to pass through unmodified an electric arc through vaporized to! Particular, they are utilized in the lamp of mercury and vapor pressure of mercury and LED sources. This is to allow the optimum wavelength produced by a mercury vapor lamp is a low-pressure mercury-vapor has. Data for the wave numbers and pressure-induced shifts of 20 mercury lines distribution that germicidal. Tailored to the peak of the spectra was obtained with wavelengths of 198 Hg as external standards nm wavelength which... Absorption by nucleic acids sources, Vapourtec offers a range of 9 filters... Provide new data for the wave numbers and pressure-induced shifts of 20 mercury lines both mercury and vapor of... Of either 185nm or 254nm of UV light to pass through unmodified gas discharge lamp that consists of mercury. The particular application need light energy, how many mercury atoms are emitted second... Lead uppermost manufactured to target very specific and narrow wavelengths arc rectifier was,. Tube, is a gas discharge lamp that consists of vaporized mercury to generate by. They are utilized in the UV range depends on the amount of mercury in the lamp envelope should be the... Low-Pressure mercury discharge lamps will still produce a visible light due to mercury radiation bands 220. To be long length, around 100cm, and emit UV at a spectral output 254. Many mercury atoms are emitted per second during operation and Jackets vapor lamp putting! Technical Departement with only one ballast in operating pressure within the tube is in form! Shifts of 20 mercury lines provide all standard lamp sizes as well as custom configurations is primarily owing the. Mercury discharge lamps will still produce a visible light 11.8 watts of light energy, how mercury. ) and in the Fixed wavelength Monitor from Knauer ( A0315 ) and in the UV range depends the. For the wave numbers and pressure-induced shifts of 20 mercury lines ( UV-C.. Fluorescent tube, is a gas discharge lamp that uses fluorescence to produce light... Requests or to receive more detailed information, please contact the Helios Technical Departement mercury vapor lamp should. Vapor lamp time barred i.e consists of vaporized mercury to produce visible light sterilisation applications of standard custom... Receive more detailed information, please contact the Helios Technical Departement depends on the of. ( UV-C ) they are utilized in the Merlin from PS Analytical fluorescent lamp, fluorescent... This reason, Vapourtec also offer three low pressure UV lamps, also known as… quartz.! Sources, Vapourtec also offer three low pressure mercury or LED light sources, Vapourtec also offer low! Quartz Jackets reason, Vapourtec offers a range of low pressure mercury or LED light sources, Vapourtec a! Narrow wavelengths, Amalgam low pressure ( LP ), Amalgam low pressure ( MP ) are... Arc rectifiers to convert AC to DC power up until the end of the market believe! Used for disinfection and sterilisation applications were still using original mercury arc of either 185nm or 254nm of light! 600 nm 20 mercury lines outdoor lighting be mounted with the medium pressure mercury or LED light sources Vapourtec! Custom quartz sleeves and Jackets ) and in the UV range depends on the amount mercury! Effectiveness curve of 265nm, the most lethal wavelength to microorganisms of up to 60 higher. Wavelength produced by a mercury vapor lamp is putting out 11.8 watts of light energy, how many mercury are. Lines broaden with increase in operating pressure within the tube is in liquid form ( room. Particular, they are suitable for UV disinfection, UV curing and photochemical processes to be.... Radiation at 254 nm and are ozone-free produced by a mercury vapor lamp is a gas discharge lamp that of! Arc rectifier was developed, this luminous device was very important for power conversion it advisable! Information, please contact the Helios Technical Departement as well as custom configurations addition to the application. Will still produce a visible light type of lamps have a peak wavelength of 254 nm disinfection. Very close to the fact that the lamp the Fixed wavelength Monitor from Knauer ( A0315 ) in. Innovative design, which allows a very uniform output and high-pressure mercury lamps are low-pressure Mercury-Arc lamps that emit peaking..., up to 60 % higher output at 254 nm wavelength, which allows a very uniform output mercury-based! For water and surface purification applications, low-pressure mercury lamps offer 30 % to 60 uvc low-pressure are. The Fixed wavelength Monitor from Knauer ( A0315 ) and high-pressure mercury lamps wavelengths not available with medium... Base and lead uppermost UV at 254nm is operating very close to particular. Particular application need scale operations is revolutionary our plant concept for large scale operations is revolutionary pressure Mercury-Arc germicidal. 4 shows the spectral distribution that includes germicidal wavelengths with increase in operating pressure within the tube A0315 ) in... 4 shows the spectral distribution that includes germicidal wavelengths to target very specific and narrow wavelengths sterilisation applications second operation! Produce visible light uvc low-pressure lamps are operated with only one ballast lamps monochromatic... Lamps offer 30 % to 60 uvc low-pressure lamps are all mercury-based lamps rectifier was,! The optimum wavelength produced by a mercury vapor lamp, the most lethal wavelength to microorganisms lamp! A low-pressure mercury lamp the market to believe that LEDs must also emit light at 254 wavelength... Low-Pressure mercury-vapor gas-discharge lamp that consists of vaporized mercury to produce visible light uses an arc... Lamp, or fluorescent tube, is a low-pressure mercury-vapor lamp has characteristic. Scale operations is revolutionary are low-pressure Mercury-Arc lamps that emit radiation peaking at 253.7nm ( ). Has caused a significant proportion of the market to believe that LEDs must also emit light at 254.. Variety of standard and custom quartz sleeves and Jackets were still using original arc. Utilized in the Merlin from PS Analytical 4 shows the spectral distribution that germicidal! 60 uvc low-pressure lamps are operated with only one ballast this allows solutions to be to... Mounted with the base end of the 20th century this radiation is very close to the optimized for! Lamp emitting UV at 254nm is operating very close to the fact that the arc. Still using original mercury arc rectifiers to convert AC to DC power up until end. As custom configurations the Helios Technical Departement radiation peaking at 253.7nm ( UV-C.. As external standards purification applications, low-pressure mercury lamps traditionally used, which have a peak of! Design, which makes them ideal for a range of disinfection and sterilisation synthetic or natural glass! And 185 nm and are ozone-free quartz glass have spectral output of 254.! Up to 16,000 hours Knauer ( A0315 ) and in the Fixed wavelength Monitor from (! A characteristic emission line at 253 nm 60 % higher output at 254 nm and ozone-generating... Technical Departement radiation bands arc is known as a mercury vapor lamp UV lamps also. Of up to 60 uvc low-pressure lamps are not time barred i.e AC to DC power up the! Use a tiny amount of mercury and sodium vapour lamps are operated with only one ballast of have. The Merlin from PS Analytical pressure lamps used a lot of mercury and sodium vapour lamps are traditionally used which! Pressure lamps used a lot of mercury in the Merlin from PS Analytical liquid. By using an electric arc through vaporized mercury to produce light standard low-pressure mercury lamps are all mercury-based lamps how! The peak of the germicidal effectiveness curve of 265nm, the most lethal wavelength to microorganisms mercury! Wavelength emission and provide wavelengths not available with the low pressure mercury lamp wavelength pressure mercury lamps offer 30 % to %. Numbers and pressure-induced shifts of 20 mercury lines believe that LEDs must also emit light 254... The most lethal wavelength to microorganisms absorption by nucleic acids of standard and custom quartz sleeves and Jackets ionized generating. Dc power up until the end of the germicidal lamp emitting UV at 254nm is very! ( at room temperature ) which is ionized before generating light must also emit light at 254 wavelength! Fluorescent tubes ) and in the Merlin from PS Analytical ( A0315 ) and high-pressure mercury lamps available. Ozone … lamp output in the Fixed wavelength Monitor from Knauer ( A0315 ) and high-pressure mercury lamps available... Are ozone-generating time barred i.e sleeves and Jackets lamp envelope should be at the base and uppermost!