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IOM Sampler

A Gold Standard for Personal Inhalable PM Sampling

IOM Sampler Cat. No. 225-70 Attached to Worker

  • 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)
    • OSHA equivalent method for particulates not otherwise regulated (PNOR)
      Reference: OSHA letter November 8, 2011

  • Economical and reusable

  • Small and lightweight
    • Plastic model weighs less than 2 ounces (55 grams)
    • Ideal for sampling vapor-phase isocyanates

  • 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

  • Stainless steel cassettes available for chemical analysis
    • Autoclavable for bioaerosol sampling

IOM Product Downloads

Performance Profile
Flow Rate 2 L/min (personal sampling)
50% Cut-point 100 µm at 2 L/min inhalable fraction
4.0 µm at 2 L/min respirable (with multiDust)
Material Molded autoclavable conductive plastic (polypropylene) or stainless steel
Maximum Operating Temperature Plastic IOM and cassette: 212 F (100 C) with no pressure
Stainless steel IOM and cassette: 392 F (200 C) suitable for autoclaving and solvent washing
Filters 25-mm membrane or fibrous filter
Tubing 1/4-inch ID
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)
The plastic IOM is not suitable for autoclaving or ethylene oxide sterilization.

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

Configuration for conductive plastic IOM Sampler and cassette - Cat. No. 225-70A and plastic IOM with stainless steel cassette - Cat. No. 225-79A


Stainless steel IOM Sampler and cassette - Cat. No. 225-76A
Configuration for 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:
  1. The size-fraction most closely associated with the specific health effect
  2. 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 IOM Sampler and cassette 225-70 225-70A
IOM Sampler and cassette, in stainless steel, with transport clip and cover IOM Sampler and Cassette in Stainless Steel 225-76A 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  Conductive plastic cassette 225-71A 225-71A
Cassette assembly, in stainless steel, with transport clip and cover Stainless steel cassette 225-75A 225-75A

Transport Clip and Cover, for cassette, protects loaded filter cassette without IOM body during transportation (shown with stainless steel cassette, not included)

Trasnspor clip and cap 225-72A 225-72A
IOM Calibration Adapter, easy to use; simple and accurate calibration
IOM Calibration adapter
391-01
Single Hole Lead Head, for sampling lead to MDHS 6 225-52, ingle Hole Lead Head, for sampling lead to MDHS 6 225-52
MultiDust Foam
Qty.
Cat. No.
MultiDust Foam Discs for Respirable and Inhalable PM
Use with filters listed below.

pk/10
pk/50
25-mm Filters for IOM Sampler
Each sample requires its own filter.
Pore Size
Qty.
Cat. No.
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
PVC 5.0 µm  100 225-5-25

IOM Product Data Bulletin (PDF)

IOM Operating Instructions (PDF)

IOM Calibration Adapter Operating Instructions (PDF)

Certificate of Conformity to EN481 (JPG)

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

 

References

Mark, D. and Vincent, J. H., "A New Personal Sampler for Airborne Total Dust in Workplaces," Ann. Occup. Hyg. Vol. 30,1986, pp. 89-102

ACGIH Technical Committee on Air Sampling Procedures: Particle Size-selective Sampling in the Workplace, ACGIH, Cincinnati, Ohio, 1984

Kenny, L.C., Bowry, A., Crook, B., and Stancliffe, J.D., “Field Testing of a Personal Size-selective Bioaerosol Sampler,” American Occupational Hygiene, Vol. 43, No. 6, 1999, pp. 393-404

Kenny, L.C., Stancliffe, J.D., Crook, B., Staff S., Griffiths, W.D., Stewart, I.W., and Futter, S.J., “The Adaptation of Existing Personal Inhalable Aerosol Samplers for Bioaerosol Sampling,” American Industrial Hygiene Association Journal, Vol. 59, 1998, pp. 831-841

Kenny, L.C., Chung, K.Y.K., and Dilworth, M., “Applications of Low-cost Multifraction Aerosol Samplers - Final Report,” IR/EXM/99/06, Health and Safety Laboratory, U.K., 1999

Kenny, L.C., Chung, K.Y.K., Dilworth, M., Hammond, C., Jones, J. Wynn, Shreeve, Z., and Winton, J., “Applications of Low-cost Dual-fraction Dust Samplers,” Ann. Occup. Hyg., Vol. 45, No. 1, 2001, pp. 35-42


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