Personal Environmental Monitor (PEM)

The Personal Environmental Monitor (PEM) is a lightweight, personal sampling device used with a personal sampling pump to provide effective collection of particulates of either 2.5 (PM2.5) or 10 µm (PM10) aerodynamic equivalent diameter in indoor air. Personal exposure is determined through gravimetric analysis for particle mass and chemical analysis for specific compounds. The PEM is available in 3 different flow rates.

Small and unobtrusive - can be connected to a sample pump and worn in the breathing zone
Referenced in EPA Method IP-10A
Suitable for ACGIH thoracic TLVs, including sulphuric acid and cotton dust as thoracic particulate matter with 10 µm PEM

The PEM consists of 3 major parts: cap, impaction ring assembly, and base with after-filter. When used with a personal sampling pump at the required flow rate, the aerosol is accelerated through a number of nozzles in the cap. Through inertia, particles larger than 50% cut-point of the sampler impact onto a greased impaction ring and can be discarded after sampling. Particles smaller than the 50% cut-point pass through the impactor and collect on a 37 mm after-filter.

The PEM was developed for indoor air sampling. While it is not an EPA-certified instrument for ambient PM10 and PM2.5 sampling for the National Ambient Air Quality Standard (NAAQS), outdoor use can be effective if there is no excessive wind velocity or rain present at the time of sampling.

Specifications

Flow Rate		2,4 or 10 L/min
50% Cut-point		2.5 or 10 µm, depending on model
Sample Media		37 mm PTFE Filters
Tubing		3/16 inch (4.76mm) ID
Dimensions		60 x 65 x 22 mm (2.3 x 2.5 x 0.9 in)
Weight		48 g (1.7 oz)

Personal Environmental Monitors (PEMs)

Description	Pack Size	Part Number
Personal Environmental Monitor (blue) for PM2.5 (2.5 µm) Sampling Flow: 2 L/min	Each	761-203
Personal Environmental Monitor (black) for PM2.5 (2.5 µm) Sampling Flow: 4 L/min	Each	761-203A
Personal Environmental Monitor (red) for PM2.5 (2.5 µm) Sampling Flow: 10 L/min	Each	761-203B
Personal Environmental Monitor (green) for PM10 (10 µm) Sampling Flow: 2 L/min	Each	761-200
Personal Environmental Monitor (gold) for PM10 (10 µm) Sampling Flow: 4 L/min	Each	761-200A
Personal Environmental Monitor (bronze) for PM10 (10 µm) Sampling Flow: 10 L/min	Each	761-200B

Accessories

Description	Pack Size	Part Number
Calibration Cap	Each	761-202
After-filter, 37 mm (2 µm pore PTFE ‡ † filter with PMP support ring)	50	225-1709
Clamping Device, ensures that the nozzle cap is clamped parallel to the base	Each	761-201

‡ Back pressure on PTFE filters can vary within the same lot.
† The maximum operating temperature for PTFE filters with PMP support ring is 240°C.

761-202

After-filter, 37 mm (2 µm pore PTFE filter with PMP support ring)

225-1709

Clamping Device, ensures that the nozzle cap is clamped parallel to the base

761-201

Documentation

PEM
Instructions

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.

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

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
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	100	225-5-37
PTFE Filters* , 37 mm, 2.0 µm pore size for metalworking fluids (NIOSH 5524)	100	225-17-33
MCE Filters, 37 mm, 0.8 µm pore size	100	225-5
Cellulose Support Pads, 37 mm	100	225-27
Stainless Steel Screen, 37 mm, wide mesh	Each	225-26
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
Forceps with non-serrated flat tips for delicate membranes	Each	225-8371
Standard-size Multi-purpose Calibration Chamber	Each	225-111

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

225-5-37

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

225-37-07

225-5

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 Impactor
(PPI) Instructions

Plastic Cyclone

The SKC Plastic Cyclone is a lightweight conductive plastic unit that holds a collection filter in a reusable cassette during sampling. The cyclone is designed to sample respirable dust as per MDHS 14/4 and the BS EN 481 criteria. When attached to a suitable sample pump respirable particles collect on the filter and larger particles fall into the grit pot, at the base, to be discarded. It is designed for a 50% cut-point of 4.0 µm at 3.0 L/min. The static-dissipating cyclone features a snap-together cassette system and is used at 3.0 L/min flow with a 25 mm or 37 mm cyclone cassette. It includes a grit pot. The SKC Plastic Cyclone 25mm (225-69) is similar to the the Higgins-Dewell design cyclone (2.2 L/min) but operates at 3.0 L/min.

The SKC Plastic Cyclone has been assessed against the respirable convention, described in BS EN 481 by the Health & Safety Laboratory, UK. A copy of the Certificate of Conformity is included with each cyclone.

Specifications

Flow Rate    3.0 L/min

50% Cut-point    4 µm at 3.0L/min

Material    Conductive plastic

Tubing    1/4inch (6.25 mm) ID
Plastic Cyclones

Description Pack Size Part Number

Plastic cyclone with 25 mm plastic cassette and grit pot Each 225-69

Plastic cyclone with 37 mm plastic cassette and grit pot Each 225-69-37

Accessories

Description	Pack Size	Part Number
Cyclone cassette 25 mm for use with 225-69	Each 500	225-62 225-62-500
Cyclone cassette 37 mm for use with 225-69-37	Each	225-62-37
Rubber grit pots	10	225-64
Stainless steel grids without tab 25 mm for use with 225-69	10	225-66
Stainless steel grids without tab 37 mm for use with 225-69-37	10	225-66-37
Filter transport case for 25 mm filters, conductive plastic	10	225-67-10
Set of 3 O-Rings for Plastic Cyclone	Set	P22569

Cyclone cassette 25 mm for use with 225-69

225-62

Cyclone cassette 37 mm for use with 225-69-37

225-62-37

225-64

Stainless steel grids without tab 25 mm for use with 225-69

225-66

Stainless steel grids without tab 37 mm for use with 225-69-37

225-66-37

Filter transport case for 25 mm filters, conductive plastic

225-67-10

P22569

Documentation

Plastic Cyclone
Instructions

Disposable Parallel Particle Impactors (PPIs)

These Parallel Particle Impactors (PPIs) are high performance 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 any other compounds with a thoracic limit. It is referenced in MDHS 14/4.

Disposable PPIs are available pre-assembled with:

Filter, filter supports, and substrates for chemical analysis (preloaded models)

Substrates only - add your own filter and filter support for gravimetric analysis

* US Patent No. 7,073,402

Reusable aluminium Parallel Particle Impactors (PPIs) are also available.

Specifications

Flow Rate		2 L/min respirable or thoracic, 4 or 8 L/min respirable
Sample Media		37 mm PVC filter, pore size 5.0 µm, 37mm PTFE Filter, pore size 2.0 µm (NIOSH 5524) or 37 mm MCE Filter, pore size 0.8 µm
Sample Media - Preloaded Filter		225-3841, 37 mm PVC filter pore size 5.0 µm with cellulose support 225-3851, 225-3871: 225-3861: 37 mm MCE Filter pore size 0.8 µm with cellulose support 225-3862: 37 mm Quartz Filter pore size 0.8 µm with cellulose support
Body material		Conductive ABS plastic
Impaction Substrate		Four 3/8 inch diameter pre-oiled porous plastic discs (already assembled)
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		31.2 g (1.1 oz)

Preloaded Disposable PPIs

Description	Pack Size	Part Number
Preloaded Disposable Thoracic PPI (blue), 2 L/min, plastic, one time use. Preloaded with four porous plastic disc impaction substrates, one 37 mm, 0.8 µm MCE collection filter, and one cellulose support. OSHA ID 113 for sulphuric acid.	Each	225-3861
Preloaded Disposable Thoracic PPI (blue), 2 L/min, plastic, one time use. Preloaded with four porous plastic disc impaction substrates, one 37 mm, Quartz collection filter, and one cellulose support. NIOSH 7908 for sulphuric acid.	Each	225-3862
Preloaded Disposable Respirable PPI (gold), 2 L/min, plastic, one time use. Preloaded with four porous plastic disc impaction substrates, one 37 mm, 5.0 µm PVC collection filter, and one cellulose support.	Each	225-3851
Preloaded Disposable Respirable PPI (red), 8 L/min, plastic, one time use. Preloaded with four porous plastic disc impaction substrates, one 37 mm, 5.0 µm PVC collection filter, and one cellulose support.	Each	225-3841
Preloaded Disposable Respirable PPI (orange), 4 L/min, plastic, one time use. Preloaded with four porous plastic disc impaction substrates, one 37 mm, 5.0 µm PVC collection filter, and one cellulose support.	Each	225-3871

Preweighed Preloaded Disposable PPIs

Description	Pack Size	Part Number
Preweighed Preloaded Disposable Respirable PPI (gold), 2 L/min, plastic, one time use. Preloaded with four porous plastic disc impaction substrates, one 37 mm, 5.0 µm PVC collection filter, and one cellulose support. Preweighed to 5 decimal places.	Each	225-3851-PW
Preweighed Preloaded Disposable Respirable PPI (red), 8 L/min, plastic, one time use. Preloaded with four porous plastic disc impaction substrates, one 37 mm, 5.0 µm PVC collection filter, and one cellulose support. Preweighed to 5 decimal places.	Each	225-3841-PW
Preweighed Preloaded Disposable Respirable PPI (orange), 4 L/min, plastic, one time use. Preloaded with four porous plastic disc impaction substrates, one 37 mm, 5.0 µm PVC collection filter, and one cellulose support. Preweighed to 5 decimal places.	Each	225-3871-PW

Disposable PPIs

Description	Pack Size	Part Number	Part Number
Disposable Thoracic PPI (blue), 2 L/min, plastic, one time use (requires filters and supports)	Each	225-386
Disposable Respirable PPI (gold), 2 L/min, plastic, one time use (requires filters and supports)	Each 25	225-385 225-385A
Disposable Respirable PPI (red), 8 L/min, plastic, one time use (requires filters and supports)	Each	225-384
Disposable Respirable PPI (orange), 4 L/min, plastic, one time use (requires filters and supports)	Each	225-387

Accessories

Description	Pack Size	Part Number
PVC Filters, 37 mm, 5.0 µm pore size	100	225-5-37
PTFE Filters* , 37 mm, 2.0 µm pore size for metalworking fluids (NIOSH 5524)	100	225-17-33
MCE Filters, 37 mm, 0.8 µm pore size	100	225-1939
Support Pads, cellulose, 37 mm	100	225-27
Stainless Steel Screen, 37 mm, wide mesh	Each	225-26
Calibration Adaptor for Disposable PPIs	Each	225-389
Forceps with non-serrated flat tips for delicate membranes	Each	225-8371

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

225-5-37

225-1939

225-27

225-26

225-389

225-8371

Documentation

Preloaded Disposable PPI
Instructions

Non-Preloaded Disposable PPI
Instructions

Button Sampler

The Button Sampler is ideal for low level personal or area inhalable sampling. It is a filter sampler with a porous curved-surface inlet designed to improve the collection characteristics of inhalable dust (100 µm aerodynamic diameter), including bioaerosols for total (viable plus non-viable) microbial count. Its conductive stainless steel inlet reduces electrostatic effects. The evenly spaced holes act as sampling orifices for multi-directional sampling. The proximity of the filter to the inlet minimises transmission losses and provides for equal distribution of particle loading and low intersample variation. The Button Sampler uses 25 mm filters, and filters with pore sizes greater than 1 µm are recommended to lower back pressure and to enhance sample times with personal sample pumps.

Referenced in MDHS 14/4
Small and lightweight
Autoclavable
Low sensitivity to wind direction and velocity
Suitable for collecting bioaerosols for viable and non-viable analysis
4 L/min flow rate enhances sensitivity

Specifications

Flow Rate		4 L/min *
Sampling Inlet		Conductive Stainless Steel
Body		Aluminium
Support Screen		Stainless Steel
Clip		Stainless Steel and nylon
O-rings		PTFE (inlet) and BUNA-N (body)
Filters		25 mm ** †
Inhalable Dust Analysis		Gravimetric
Fungal Spore Analysis		Epifluorescence microscopy, immunoassay, or polymerase chain reaction (PCR)
Metals Analysis		X-ray Fluorescence (XRF)
Tubing		1/4 inch (6.25mm) ID

* The Button Sampler closely follows the ISO 7708/CEN inhalability curve at 4 L/min. This provides optimum sampling.
** A filter pore size of 1.0 µm or larger is recommended for use with the Button Sampler to reduce back pressure.
† Using Gelatin Filters in the Button Sampler:

For maximum micro-organism survivability and superior collection of inhalable-size bioaerosols, use sterile gelatin filters (225-9551) with the SKC Button Sampler. Combining the Button Sampler with the nurturing properties of gelatin filters creates a sampler that is most efficient at collecting inhalable bioaerosols for viable or non-viable analysis.

Button Sampler

Description Pack Size Part Number

Button Sampler with lapel clip; requires a 25 mm diameter filter Each 225-360

Accessories

Description	Pack Size	Part Number
Protective Shield, for abrasive blasting environments	Each	225-366
Button Sampler Calibration Adaptor	Each	225-361
Filter Transport Case, for 25 mm diameter filters, conductive plastic	10	225-67-10
Replacement O-ring PTFE, for Button Sampler	Each	P32265
Replacement O-ring BUNA-N, for Button Sampler	50	P31891
Glass Fibre filters, diameter 25 mm, 1.0 µm Liquid nominal pore size	500	225-702
Mixed Cellulose Ester filters (MCE), diameter 25 mm, pore size 1.2 µm	100	225-1912
PTFE filters with PMP support (Teflo®) # ‡ diameter 25 mm, pore size 3 µm	50	225-1711
Gelatin filters, sterilised, diameter 25 mm †	50	225-9551
Polyvinyl chloride filters (PVC), diameter 25 mm, pore size 5.0 µm	100	225-5-25
Support Screen for Button Sampler, 25 mm diameter	Each	P26034

‡ Back pressure on PTFE filters can vary within the same lot
† Gelatin filters dissolve when placed on agar
# Maximum operating temperature is 240°C (464°F)