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IOM Sampler

A Gold Standard for Personal Inhalable PM Sampling

Meets U.S. and international standards

ACGIH sampling criteria for inhalable particulate
ISO/CEN health-related fraction of bioaerosols
Preferred sampler for HSE Method MDHS 14/3
NIOSH Method 5700 for particulate formaldehyde
Australian standard for inhalable particulate
Complies with MDHS 25/3 for organic isocyanates (stainless steel model)
Complies with MDHS 6/3 for lead (with single-hole head accessory)

Economical and reusable
Small and lightweight

Plastic model weighs less than 2 ounces (55 grams)

Efficient particulate sampling up to 100 µm
Maintains sample integrity

Removable 25-mm cassette system eliminates filter handling
Cassette and filter are weighed as a single unit to include all collected particles in analysis

Sampler and cassette available in stainless steel for chemical analysis

Provides ultimate moisture stability and autoclaving at higher temperatures
Ideal for sampling vapor-phase isocyanates

Improved plastic material significantly reduces effects of moisture

IOM Product Data Bulletin (PDF)

IOM Operating Instructions (PDF)

Certificate of Conformity to EN481 (JPG)

Foam Insert Testing to BS EN13205 Certificate of Conformity to EN481 (JPG)

IOM FAQs

Performance Profile

Flow Rate	2 L/min (personal sampling)
50% Cut-point	100 µm at 2 L/min inhalable fraction
Material	Molded autoclavable conductive plastic or stainless steel
Maximum Temperature for Autoclaving	Plastic IOM: 104 F (40 C) Stainless steel IOM: 212 F (100 C)
Filters	25-mm membrane or fibrous filter
Weight (plastic model with cassette)	< 2 oz (55 gm)
Dimensions	3.3 x 1.1 in (8.5 x 2.8 cm)
Analysis	Gravimetric or chemical (stainless steel model)

IOM Sampler
The patented* IOM Sampler, developed by J. H. Vincent and D. Mark at the Institute of Occupational Medicine (IOM) in Scotland, meets the ACGIH sampling criteria for inhalable particulate mass. The IOM Personal Inhalable Sampler is a conductive plastic sampling head that houses a reusable 25-mm filter cassette with specified filter for the collection of inhalable airborne particles. When attached to a personal sampling pump operating at 2 L/min and clipped near a worker’s breathing zone, the IOM effectively traps particles up to 100 µm in aerodynamic diameter and closely simulates the manner in which airborne workplace particles are inhaled through the nose and mouth. Because both the cassette and the filter are pre and post-weighed as a single unit, all particles collected (even larger ones) are included in the analysis. The cassette can be cleaned, reloaded with a new filter, and reused.

* U.S. Patent No. 4,675,034

Conductive plastic IOM Sampler and cassette - Cat. No. 225-70A

Conductive plastic IOM Sampler and cassette - Cat. No. 225-70A

Stainless steel IOM Sampler and cassette - Cat. No. 225-76A

Particle Size-selective Dust Sampling
The hazard potential of airborne dust, solid particles, or droplets is dependent on the mass concentration as well as the particle size. Particle size determines the deposition site within the respiratory tract and the subsequent health effect. Therefore, the American Conference of Governmental Industrial Hygienists (ACGIH®) has recommended that particle-size selective Threshold Limit Values (TLV®s) be developed for inhalation hazards in the workplace.

Particle-size selective TLVs consider two points:

The size-fraction most closely associated with the specific health effect
The mass concentration within that size fraction which should represent the TLV

The ACGIH recommends that particle-size selective TLVs be expressed in three forms:

ACGIH recommends that particle-size figure

Inhalable Particulate Mass: Dust particles having a 50% cut-point of 100 µm. These dust particles are hazardous when deposited anywhere in the respiratory tract.
Thoracic Particulate Mass: Dust particles having a 50% cut-point of 10 µm. These dust particles are hazardous when deposited anywhere in the lung airways and gas-exchange regions.
Respirable Particulate Mass: Dust particles having a 50% cut-point of 4 µm. These dust particles are hazardous when deposited anywhere in the gas-exchange regions.

Since inhalable particulate mass is defined as those materials that are hazardous when deposited anywhere in the respiratory tract, including the nose and mouth, a sampler designed for the collection of inhalable dust should have a median cut-point of 100 µm.

Ordering Information

IOM Samplers, 25-mm filter is required, select from below			Cat. No.
IOM Sampler and Cassette, in conductive plastic, with transport clip and cover			225-70A
IOM Sampler and Cassette, in stainless steel, with transport clip and cover			225-76A
IOM Sampler, in conductive plastic, with stainless steel cassette, transport clip, and cover			225-79A
PCXR4 Single 115 V Pump Kit with IOM, does not include cassette holder			224-PCXR4PK
Accessories
Cassette Assembly, in conductive plastic, with transport clip and cover			225-71A
Cassette Assembly, in stainless steel, with transport clip and cover			225-75A
Transport Clip and Cover, for cassette, protects loaded filter cassette without IOM body during transportation (shown with stainless steel cassette, not included)			225-72A
IOM Calibration Adapter, easy to use; simple and accurate calibration			391-01
Single Hole Lead Head, for sampling lead to MDHS 6			225-52
MultiDust Foam
MultiDust Foam Discs for Simultaneous Fraction Sampling, optimized for 4-µm median cut-point; certificate containing test data supplied with each batch, pk/10 Use with filters listed below.			225-772
25-mm Filters for IOM Sampler Each sample requires its own filter.	Pore Size	Qty.	Cat. No.
Polyvinyl Chloride (PVC)	5.0 µm	100	225-8-04
Glass Fiber	1.0 µm	500	225-702
Mixed Cellulose Ester (MCE)	0.8 µm	100	225-1930
Polycarbonate	0.8 µm	100	225-1601
Gelatin		50	225-9551