Aerosol Chemical Speciation Monitor
Measures mass loading and chemical composition of non-refractory aerosol particles in real-time.
ACSM instruments use the same technology as our AMS series. 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.
There are three ACSM models available: quadrupole, time-of-flight, or time-of-flight with eXtended resolution. ACSM can be configured for either a PM 1 or a PM 2.5 lens, as well as a standard or a capture vaporizer.
Each model provides mass concentrations of organics, sulfate, nitrate, chloride and ammonium with different limits of detection and time responses.
Aerosol Chemical Speciation Monitor Models
ACSM Accessories
PM 1 Lens
Particle aerodynamic lens (70 nm – 700 nm transmission range)
PM 2.5 Lens
Particle aerodynamic lens (110 nm – 3500 nm diameter)
Standard Vaporizer
Best suited for smaller particles
Capture Vaporizer
Recommended for 2.5 lens; designed to trap the bounce as particle size increases.
Aerosol Dryer System
Simple solution to dry aerosol sample; data logging of RH/T and P
Sampling System
Combines a pump and a mass flow meter with active flow regulation to deliver the sample to the AMS inlet
Quadrupole Aerosol Chemical Speciation Monitor
Measure real-time, non-refractory aerosol particle mass and chemical composition.
- Aerodynamic particle lens for efficient gas-particle separation
- Mass spectrometric analysis (0-200 amu)
- Automated zeroing (filter)
- Minimal maintenance; remote control ready
- Direct linear detection of sulfate, nitrate, ammonium, chloride and organic aerosol species through two-step thermal vaporization (~600 C) and electron impact ionization process
- Separation and quantification of organic aerosol species, including primary and secondary organic aerosol
Time-of-Flight Aerosol Chemical Speciation Monitor
Measure real-time, non-refractory aerosol particle mass and chemical composition.
- Aerodynamic particle lens for efficient gas-particle separation
- Mass spectrometric analysis (0-200 amu)
- Automated zeroing (filter)
- Minimal maintenance; remote control ready
- Direct linear detection of sulfate, nitrate, ammonium, chloride and organic aerosol species through two-step thermal vaporization (~600 C) and electron impact ionization process
- Improved separation and quantification of organic aerosol species, including primary and secondary organic aerosol, compared to the Q-ACSM
TIME-OF-FLIGHT AEROSOL CHEMICAL SPECIATION MONITOR WITH EXTENDED RESOLUTION
- Improved elemental analysis (O:C, H:C) and NH4+ compared to standard Q- and TOF-ACSM
- Aerodynamic particle lens for efficient gas-particle separation
- Mass spectrometric analysis (0-400 amu)
- Automated zeroing (filter)
- Minimal maintenance; remote control ready
- Direct linear detection of sulfate, nitrate, ammonium, chloride and organic aerosol species through two-step thermal vaporization (~600 C) and electron impact ionization process
Aerosol Chemical Speciation Monitor Specifications
| ACSM Model | Resolving Power M/ΔM* | Data Rate (min) |
Particle Size Range Standard lens / PM 2.5 (nm) |
Length x Depth x Height | Weight |
|---|---|---|---|---|---|
|
UMR |
30 |
70-700 | 110-3500 |
21” x 19.5” x 34” 53 cm x 50 cm x 86 cm |
140 lbs 64 kg |
|
|
UMR |
10 |
70-700 | 110-3500 |
25.6” x 20.1” x 23.6” 65 cm x 51 cm x 60 cm |
165 lbs 75 kg |
|
|
Up to 2000 |
10 |
70-700 | 110-3500 |
26” x 20” x 24” 65 cm x 51 cm x 60 cm |
210 lbs 95 kg |
Specifications depend on instrument settings and are subject to change without notice.
*Resolving Power: UMR = Unit Mass Resolution
LIMIT OF DETECTION (µg m-3, INSTRUMENT DATA RATE, 3σ)
| ACSM Model | Data Rate | Organics | Sulfate | Nitrate | Chloride | Ammonium |
|---|---|---|---|---|---|---|
|
30 minute |
0.7 |
0.09 |
0.05 |
0.07 |
0.4 |
|
|
10 minute |
0.31 |
0.04 |
0.09 |
0.06 |
0.19 |
|
|
10 minute |
0.14 |
0.0087 |
0.016 |
0.01 |
0.0045 |
Specifications depend on instrument settings and are subject to change without notice.