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Particulates Black carbon
Black carbon
Black carbon particles are directly emitted to the air during all combustion processes, but are principally associated with diesel or coal smoke. They can effect public health, contribute to climate change and impact visibility.
The Aethalometer® is an instrument that uses optical analysis to determine the mass concentration of “Black Carbon” particles collected from an air stream passing through a filter.
The Aethalometer technology is available on different chassis and platforms: Rack Mount, Portable, Modular, High Range, and Optical Transmissometer. The aethalometer is available in different configurations: “dual wavelength” (infra-red 880 nm for Black Carbon; ultraviolet 370 nm for aromatic organic compounds) and “seven wavelength Spectrum” (7 sources from 370 nm to 950 nm).
Products
Magee MicroAeth Model AE51
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Magee microAeth Model AE51 is the world's first ever real-time, pocket-sized Black Carbon aerosol monitor. The instrument can be placed virtually anywhere and provide real-time information about the concentration of black carbon in the atmosphere. The instrument can operate continuously for up to 24 hours on a single battery charge. An external back up battery option is available for longer run times. The air sample is collected and analyzed within the microAeth instrument on T60 (Teflon coated glass fiber) filter media. The filter media is constructed within a filter ticket form for easy handling and secure placement into the instrument. The filter tickets can be uniquely marked for archiving purposes and / or subsequent analysis. Application: Environmental Monitoring, personnel pollution monitor |
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Magee Portable Aethalometer® Model AE42
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The AE42 Portable Aethalometer measures optical absorption by suspended aerosol particles at two wavelengths: 880 nm (IR), quantitative for the mass of ‘Black’ Carbon; and 370 nm (UV), indicating aromatic organic compounds. The instrument’s analytical performance is identical to the “full size” AE22, but it is constructed in a small portable case with an internal battery providing several hours of mobile operation. The AE42 can also be operated from an AC transformer or by cables from an external battery or automobile power outlet. This instrument is widely used for studying indoor air quality, and for the mobile mapping of the air quality impacts of localized sources. The Portable Aethalometer may also be supplied with “seven wavelength Spectrum” optics upon request. The AE42’s can be supplied with a GPS position receiver kit that attaches to the instrument's COM port. |
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Magee Rack Mounted Aethalometer AE22 & AE31
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The 'rack mount' model is constructed in a standard 19-inch enclosed chassis. The instrument simultaneously samples and measures the mass concentration of black carbon particles in the air. A digital display/keypad combination interface is used to operate, monitor, calibrate, and service the instrument. The measurement data are stored within the instrument on removable media. The AE22 Aethalometer measures the optical absorption of carbon particles at two wavelengths: 880 nm (IR), quantitative for the mass of ‘Black’ or Elemental Carbon; and 370 nm (UV), indicating the presence of aromatic organic compounds such as are found in wood smoke, biomass-burning smoke, and tobacco smoke. The AE31 Aethalometer measures optical absorption by suspended aerosol particles at seven wavelengths, from 370 nm (UV) to 950 nm (IR). Interpretation of the differences in optical response across the wavelength spectrum reveal information regarding aerosol size distribution, physical properties, and assist in identifying the primary components. |
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Magee Optical Transmissiometer
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The Magee Scientific SootScan™ Model OT21 Optical Transmissometer bench top analyzer has been developed as a simple and robust way of assessing Black Carbon particulate matter (PM) from a variety of sample filters. The analysis can be easily performed in the field or the laboratory, and requires less than thirty seconds to provide optical attenuation and BC mass concentration results. |
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Five Reasons to Measure Black Carbon
- Black Carbon is a primary aerosol component of Diesel Particulate Matter, a known toxin and regulated pollutant by several regulatory agencies,
including the California Air Resources Board (CARB). - Diesel Particulate Matter is known to cause adverse health effects in people who are exposed, including premature hospitalization, asthma attacks, bronchitis, other respiratory and cardiovascular symptoms, and premature death.
- Black Carbon is the second leading cause of Global Warming.
- Black Carbon is emitted as a primary pollutant to the atmosphere through a variety of incomplete combustion of sources and fuels; BC concentration cannot be modeled or predicted, it must be measured.
- Black Carbon is NOT adequately characterized through PM-2.5 mass only measurements, chemical speciation is necessary.