(a) The photo of TOF-ACSM and (b) its working diagram, cited from Fröhlich et al., 2013
The Aerodyne Aerosol Chemical Speciation Monitor (ACSM) measures mass loading and chemical composition of non-refractory aerosol particles in real-time. Smaller, lower cost, more robust, and simpler to operate than our AMS instruments, the ACSM is designed for long-term unattended deployment and routine monitoring applications.
The ACSM is available with either a quadrupole or time-of-flight mass spectrometer and can be configured for either PM1 or PM2.5.
• Continuous on-line measurement of ambient aerosol mass concentrations.
• Composition analysis for particulate ammonium, nitrate, sulfate, chloride, and organic species.
• Field measurements of aerosol chemical com position from high-pollution at urban sites to pristine background at remote locations.
• Routine air quality monitoring.
• Aerosol chamber studies.
• Source characterization.
• Optical/CCN closure.
• Industrial process monitoring.
• Aerodynamic particle lens for efficient gas-particle separation.
• Linear universal detection through two-step thermal vaporization (~600 C) and electron impact ionization process.
• Mass spectrometric analysis (0-400 amu).
• Automated zeroing (filter).
• Minimal maintenance.
• Remote control ready.
• Separation and quantification of organic aerosol species including HOA (hydrocarbon-like organic aerosol, linked to primary combustion sources) and OOA (oxygenated organic aerosol, linked to secondary aerosol sources).
Sensitivity (µg m-3 , 10 minute, 3σ ):
Data Rate: Adjustable, 10 minutes is typical
Sample Flow: 85 cc min-1 (volumetric flow)
Operating Pressure: Ambient Aerosol
Size range: 40 nm to 1 µm (vacuum aerodynamic diameter).
DAQ Control: Hi-speed USB 14 bit acquisition card, PC embedded in instrument rack.
Size/Weight: Bench top, 25.6” x 20.1” x 23.6”, 165 lbs [65 cm x 51 cm x 60 cm , 75 kg]
Electric Power: 600 W Max; 350 W typical, 90-260 VAC, 50-60 Hz
Software: Custom acquisition and analysis routines. Specialized routines for PMF analysis of the organic fraction.