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Parallel Particle Impactors (PPIs)

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.

Thoracic PPI 2L/min
Respirable PPI 2L/min
Respirable PPI 4L/min
Respirable PPI 8L/min
PPI
  • 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

Single-use disposable Parallel Particle Impactors (PPIs) are also available.

Specifications
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 (4.25in)
Diameter: 4.6 cm (1.8 in)
Depth: 3.0 cm (1.2 in)
Weight    93.6 g (3.3 oz)
Parallel Particle Impactors
Description Pack Size Part Number  
Thoracic PPI (blue), 2 L/min, aluminium
(requires substrates, filters, and supports)
Each 225-381  225-381 Thoracic Parallel Particle Impactor (PPI) (blue), 2 L/min flow rate 
Respirable PPI (gold), 2 L/min, aluminium
(requires substrates, filters, and supports)
Each 225-380  225-380 Respirable Parallel Particle Impactor (PPI) (gold), 2 L/min flow rate 
Respirable PPI (orange), 4 L/min, aluminium
(requires substrates, filters, and supports)
Each 225-382  225-382 Respirable Parallel Particle Impactor (PPI) (orange), 4 L/min flow rate 
Respirable PPI (red), 8 L/min, aluminium
(requires substrates, filters, and supports)
Each 225-383  225-383 Respirable Parallel Particle Impactor (PPI) (red), 8 L/min flow rate 
Accessories
Description Pack Size Part Number  
PVC Filters, 37 mm, 5.0 µm pore size 100 225-5-37  225-5-37 PVC Filters, diameter 37 mm, pore size 5.0 µm 
PTFE Filters*   , 37 mm, 2.0 µm pore size for metalworking fluids (NIOSH 5524) 100 225-17-33  225-27-07 PTFE Filters, PTFE Filters diameter 37 mm, pore size 2.0 µm, for metalworking fluids (NIOSH 5524) 
MCE Filters, 37 mm, 0.8 µm pore size 100 225-5  225-5 Mixed Cellulose Ester (MCE) Filters, diameter 37 mm, pore size 0.8 µm 
Cellulose Support Pads, 37 mm 100 225-27  225-27 Cellulose Support Pads, 37 mm 
Stainless Steel Screen, 37 mm, wide mesh Each 225-26  225-26 Stainless Steel Screen, diameter 37 mm, wide mesh 
Impaction Substrates, 4 required for each sample. Porous Plastic disc, 3/8 inch diameter, pre-oiled, ready to use, disposable.

Limited shelf life
200 225-388  225-388 Impaction Substrates for PPI Sampler 
Forceps with non-serrated flat tips for delicate membranes Each 225-8371  225-8371 Forceps with non-serrated flat tips for delicate membranes 
Standard-size Multi-purpose Calibration Chamber Each 225-111  225-111 Standard-size Multi-purpose Calibration Chamber 

* Back pressure on PTFE filters can vary within the same lot.

PVC Filters, 37 mm, 5.0 µm pore size

225-5-37

PTFE Filters, 37 mm, 2.0 µm pore size, unlaminated for metalworking fluids

225-37-07

MCE Filters, 37 mm, 0.8 µm pore size

225-5

Cellulose Support Pads, 37 mm

225-27

Stainless Steel Screen, 37 mm, wide mesh

225-26

Impaction Substrates, 4 required for each sample. Porous Plastic disc, 3/8 inch diameter, pre-oiled, ready to use, disposable.

225-388

Standard-size Multi-purpose Calibration Chamber

225-111

Forceps with non-serrated flat tips for delicate membranes

225-8371

Documentation
Parallel Particulate Impactors (PPI) Instructions

Parallel Particulate Impactor
(PPI) Instructions