High-efficiency low-pressure mercury lamps offer 30% to 60% higher output at a spectral output of 254 nm and are ozone-free. 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. Its wavelength at low pressure ranges between 184 nm and 253 nm. Low pressure mercury lamps (LP Hg lamp) provide highly efficient source of ultraviolet energy, particularly short wavelength UV light (254nm and 185nm). The high intensity medium pressure mercury lamp has a broad radiant output – providing wavelengths from 220 nm to 600 nm. Basically, this lamp discharges gas when heated or cooled. Fig. They are suitable for UV disinfection, UV oxidation, UV curing and photochemical processes. Both mercury and sodium vapour lamps are mostly used as outdoor lighting. We provide all standard lamp sizes as well as custom configurations. Spectral emission lines broaden with increase in operating pressure within the tube. 1.08 x 1017 atoms 5. 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. These type of lamps have an operating life of up to 16,000 hours. Low Pressure (LP), Amalgam Low Pressure (LP) and Medium Pressure (MP) lamps are all mercury-based lamps. 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. 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). 5.25 x 1020 atoms 2. 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. This is to allow the optimum wavelength produced by a Mercury arc of either 185nm or 254nm of UV light to pass through unmodified. 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. 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. What's the Difference Between Low Pressure (LP), Amalgam Low Pressure (LP), and Medium Pressure (MP) UV Lamps? 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. The lamps tend to be long length, around 100cm, and emit UV at a high intensity. 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. 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. they do not have a definite life span. HOGL. 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. This radiation is very close to the peak of the germicidal effectiveness curve of 265nm, the most lethal wavelength to microorganisms. In addition, rather than being … 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. Compact lamps are available in a specially engineered two-tube linear innovative design, which allows a very uniform output. Mercury (Hg) Strong Lines of Mercury ( Hg ) Intensity : Vacuum Wavelength (Å) Spectrum : Reference : 20 : 893.0847 Lamp output in the UV range depends on the amount of mercury and vapor pressure of mercury in the lamp. Low pressure mercury lamp. Low-pressure mercury lamps (fluorescent tubes) and high-pressure mercury lamps are also used for disinfection and sterilisation. Any clamp around the lamp envelope should be at the base end of the lamp. Definition: A lamp that consists of vaporized mercury to generate light by using an electric arc is known as a mercury vapor lamp. 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. A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. 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. 1. In particular, they are utilized in the Fixed Wavelength Monitor from Knauer (A0315) and in the Merlin from PS Analytical. 1.50 x 1019 atoms 4. 4 shows the spectral distribution of a low-pressure mercury lamp. Our measurements provide new data for the wave numbers and pressure-induced shifts of 20 mercury lines. 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