Parallel Particle Impactors (PPIs)
A small sampler with 4 impactors in 1 unit, which provides the closest match to the ACGIH/ISO/CEN respirable and thoracic conventions.
Respirable Thoracic
These Parallel Particle Impactors (PPIs) are high performance, reusable Thoracic and Respirable PM Samplers. The patented* design has the power of 4 impactors in one small, conductive aluminium sampler, to provide the closest match to the ACGIH/ISO/CEN thoracic or respirable conventions. Disposable pre-oiled porous plastic impaction substrates reduce the negative effects that particle buildup and bounce can have on the sample accuracy, by firmly trapping larger particles. Unlike other samplers, the sampling efficiency of the PPI is not dependent on the collected particle type.
- Lightweight – weighs only 93g
- 8 L/min Respirable model provides enhanced sampling sensitivity for WEL/TWA silica and other compounds with low target concentrations. Ideal for short term task monitoring. It is referenced in MDHS 14/4.
- 4 L/min Respirable model provides higher flow option and use of intrinsically safe personal pumps.
- 2 L/min Respirable model is ideal for standard WEL/TWA sampling.
- 2 L/min Thoracic model is ideal for metal working fluids, or WEL/TWA monitoring for sulphuric acid, or other compounds with a thoracic limit. It is referenced in MDHS 14/4.
The patented* SKC Parallel Particle Impactor (PPI) samplers contain four small impactors in the inlet section of the device. Each impactor features a unique 50% cut-point to target a specific one-quarter segment of the ISO/CEN curve resulting in a precise fit along the entire curve. A sample pump pulls air through the inlet nozzle of each impactor in the inlet plate. Particles larger than each impactor’s 50% cut-point are scrubbed and retained on the porous oiled impaction substrate, while smaller particles continue to the standard 37 mm collection filter for analysis.
* US Patent No. 7,073,402
Plastic disposable Parallel Particle Impactors (PPIs) are also available.
| Flow Rate | 2 L/min respirable or thoracic and 4 or 8 L/min respirable |
| Sample Media | 37 mm Quartz filter 5.0µm pore size, 37 mm PTFE Filter 2.0 µm pore size (NIOSH 5524) or 37 mm MCE Filter pore size 0.8 µm. Use cellulose pad or stainless steel screen for filter support. |
| Body material | Conductive aluminium |
| Impaction Substrate | Four 3/8 inch diameter pre-oiled porous plastic discs |
| Analysis | Gravimetric or chemical |
| Tubing | 1/4 inch (6.25mm) ID |
| Dimensions | Height: (clip to exhaust): 10.8 cm Diameter: 4.6 cm Depth: 3.0 cm |
| Weight | 93.6 g |
Parallel Particle Impactors
| Description | Pack Size | Part Number | |
|---|---|---|---|
| Thoracic PPI (blue), 2 L/min, aluminium (requires substrates, filters, and supports) | Each | 225-381 |  |
| Respirable PPI (gold), 2 L/min, aluminium (requires substrates, filters, and supports) | Each | 225-380 |  |
| Respirable PPI (orange), 4 L/min, aluminium (requires substrates, filters, and supports) | Each | 225-382 |  |
| Respirable PPI (red), 8 L/min, aluminium (requires substrates, filters, and supports) | Each | 225-383 |  |
Accessories
| Description | Pack Size | Part Number | |
|---|---|---|---|
| PVC Filters, 37 mm, 5.0 µm pore size | 223-241 |  | |
| MCE Filters, 37 mm, 0.8 µm pore size | 224-89 | | |
| Cellulose Support Pads, 37 mm | 224-912 | ||
| Stainless Steel Screen, 37 mm, wide mesh | 224-905 |  | |
| Impaction Substrates, 4 required for each sample. Porous Plastic disc, 3/8 inch diameter, pre-oiled, ready to use, disposable. Limited shelf life | 224-12 |