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Sioutas Personal Cascade Impactor
Separates Coarse, Fine, and Ultrafine Particles
- Precise particle separation
- Particle size cut-points: 2.5 µm, 1.0 µm, 0.50 µm, and 0.25 µm
- The only personal impactor that efficiently samples coarse, fine, and ultrafine particles simultaneously
- Maintains high collection efficiency even at high particle concentrations
- Optimized at 9 L/min flow rate with low pressure drop for 24-hour sampling
- Maintains specified 50% cut-points
- Improves analytical sensitivity
- Minimizes non-detectable samples
- Preserves unstable compounds
- Chemically inert collection substrate
- No impaction grease to contaminate sample
- Minimal particle bounce and internal wall losses
- Suitable for indoor and outdoor* sampling
- Size-fractionated samples can be analyzed gravimetrically, chemically, and microscopically
- Small and lightweight
- Suitable for personal or area sampling
- 5.6 ounces (159 grams)
Sioutas Cascade Impactor Operating Instructions (PDF)
Sioutas Cascade Impactor Spec. Sheet (PDF)
Sioutas Cascade ImpactorThe patented† personal-size Sioutas* Cascade Impactor separates and collects airborne particles in five size ranges: > 2.5 µm, 1.0 to 2.5 µm, 0.50 to 1.0 µm, 0.25 to 0.50 µm, and < 0.25 µm. When used with PTFE collection filters, the Sioutas Impactor is highly efficient at collecting particles without the use of impaction grease or substrate coatings and at retaining unstable compounds for size-fractionated chemical analysis.
| † | U.S. Patent No. 6,786,105 |
| * | Developed by Dr. Constantinos Sioutas of the University of Southern California in partnership with the Mickey Leland National Urban Air Toxics Research Center (NUATRC). See reference below. |
| * | Requires special provisions, see operating instructions. |
Sioutas Impactor and Leland Legacy Pump Are Powerful Partners
| The Sioutas Impactor and SKC Leland Legacy Sample Pump operated at 9 L/min are powerful partners that ensure precise particle separation at the specified cut-points and sample collection on the filters at each stage. The Sioutas Impactor is simply clipped to a worker's collar or lapel for personal sampling and is also suitable for area sampling. |  |
|
Sioutas Impactor and Leland Legacy Receive
ETV VerificationWhy Use the Sioutas Personal Impactor?
PM2.5 (fine particulate matter) has been linked to an increase in respiratory symptoms and related hospital visits, aggravated asthma, chronic bronchitis, and premature death. Indoor concentrations of PM are often higher than outdoor concentrations. Studies show that the traditional stationary monitors used for ambient PM measurement are poor estimators of personal PM exposures; they do not assess the effects of PM on vulnerable individuals. The new approach to sampling fine PM includes:
- Sampling of microenvironments, i.e., personal sampling
- Sampling of vulnerable persons
- Measuring the mass of exposure
- Measuring particle size
- Evaluating particle chemistry
Sioutas Impactor Applications
- Industrial hygiene studies
- Indoor Air Quality (IAQ) studies
- Air pollution studies
- Inhalation toxicology and epidemiological studies
- Aerosol research
- Pharmaceutical studies
- Outdoor ambient sampling (requires special provisions, see operating instructions).
| Flow Rate | 9 L/min Stage A: 2.5 µm Stage B: 1.0 µm Stage C: 0.50 µm Stage D: 0.25 µm |
| Recommended After-filter Type | 37-mm, 2.0-µm PTFE filter•† (Cat. No. 225-1709) |
| Recommended Collection Filter for Stages |
25-mm, 0.5-µm PTFE with laminated PTFE support |
| Wind Velocity | < 5 mph |
| Operating Temperature | Maximum operating temperature of PTFE Filters with the PMP support ring is 464 F ( 240 C) |
| Maximum Particle Load | Varies per stage ‡ |
| Construction Material | Stages are anodized aluminum; O-rings are Buna-N (Nitrile); filter retainers are acrylic |
| Inlet and Outlet Diameters | Inlet: 3/8-in OD and 1/4-in ID Outlet: 3/8-in OD and 1/4-in ID |
| Dimensions | 3.4 x 2.2 in (8.6 x 5.5 cm) |
| Weight | 5.6 oz (159 gm) |
• |
Back pressure on PTFE filters can vary within the same lot. |
| † | The maximum operating temperature for PTFE filters with PMP support ring is 464 F (240 C). |
| ‡ | See NUATRC Report No. 2 at http://www.sph.uth.tmc.edu/mleland/attachments/MLeland_Sioutas2.pdf. |
Filters for the Sioutas Impactor
The Sioutas uses four
25-mm filters (required)
and one 37-mm filter (optional) for sampling.
The 25-mm PTFE filters act as collection substrate and the optional
37-mm PTFE filter is the final collection filter (after-filter). SKC
recommends PTFE filters• for
use in the Sioutas Impactor to minimize particle bounce and preserve
unstable compounds. Coated
collection substrate may be used
if desired, however, a coating is not necessary and can interfere
with chemical analysis. See Ordering Information for
recommended filters.
• Back pressure on PTFE filters can vary within the same lot.
Ordering Information| Description | Cat. No. | |
| Sioutas Personal Cascade Impactor |  |
225-370 |
| Accessories | ||
| Leland Legacy
Pump with
Li-Ion battery pack, requires
charger Use in non-explosive environments only; not UL Listed for intrinsic safety; CE marked. Contains Li-ion batteries and is subject to special shipping, see Leland Legacy Pump page for more information |
 |
|
| Defender
510 Primary Standard Calibrator includes
lead-acid battery, multi-plug charger (100-240 V), Optimizer
Software, 39-inch (1-meter)
serial cable, and leak test caps Software requires Windows 2000, XP (SP2 or 3), or Vista (32-bit version) an RS-232 port or USB to RS-232 adapter. |
 |
717-510H |
| Tubing, Tygon, 1/4-inch ID fits Sioutas Impactor and Leland Legacy pump, 3.3 feet | 225-13-4A | |
| Sioutas Replacement Parts | ||
| Replacement Collector Plates, set of 4 | P55016 | |
| Retainer Rings only, pk/4 | P20151 | |
| Replacement O-ring, Retainer, and Spacer Set for Sioutas Impactor includes 4 filter retainer rings, 9 O-rings, and 1 PTFE spacer ring | P51917 | |
| Recommended Filter for Sioutas Impactor | ||
| After-filter, 37-mm PTFE•†, 2.0 µm, optional | 225-1709 | |
| Collection Substrate (filter for 4 stages), 25-mm, PTFE•, 25 mm, 0.5-µm pore, required | 225-2708 | |
• |
Back pressure on PTFE filters can vary within the same lot. |
† |
The maximum operating temperature for PTFE filters with PMP support ring is 464 F (240 C). |
Reference:
Misra, C., Singh, M., Shen, S., Sioutas, C., Hall, P., "Development and
Evaluation of a Personal Cascade Impactor Sampler (PCIS)," Journal of
Aerosol Science, 33, 2002, pp. 1027-1047
Singh, M., Misra, C., Sioutas, C., "Field Evaluation of a Personal Cascade Impactor Sampler (PCIS)," Atmospheric Environment, 37, 2003, pp. 4781-4793
Sioutas, C., "Development of New Generation Personal Monitors for Fine Particulate Matter (PM) and its Metal Content," NUATRC Research Report No 2, 2004, http://www.sph.uth.tmc.edu/mleland/attachments/MLeland_Sioutas2.pdf
Sioutas Cascade Impactor Operating Instructions (PDF)
Sioutas Cascade Impactor Spec. Sheet (PDF)
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