Aethalometer: Rack Mount Models AE22 and AE31
The 'rack mount' model is constructed in a standard 19-inch enclosed chassis. This aethalometer model is most commonly used in air monitoring network stations, providing continuous unattended operation. 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 (compact flash or floppy disc drive options available). An analog channel outputs a signal for communicating the real-time mass concentration to an external data logger. This analog channel can also be programmed to communicate an instrument status condition.
Rack-Mount Aethalometer® Model AE22 Dual-wavelength
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 Real-time measurements can be made with time resolution from one second to one hour. Performing the dual wavelength measurement is important in determining the sources of airborne black carbon particles (ie. diesel exhaust vs. wood smoke combustion). The instrument is widely used in monitoring applications involving human exposure to localized, community-based sources of air pollution.
Rack-Mount Aethalometer® Model AE31 "Spectrum" Seven-wavelength
The AE31 Aethalometer measures optical absorption by suspended aerosol particles at seven wavelengths, from 370 nm (UV) to 950 nm (IR). Real-time measurements of particle concentrations can be made with a time resolution of two minutes to one hour. 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. This instrument is widely used in monitoring studies involving large scale, regional air pollution problems.
