NIOSHTIC-2 Publications Search

A shelter to protect a passive sampler for coarse particulate matter, PM10-2.5.

Ott DK; Peters TM
Aerosol Sci Tech 2008 Apr; 42(4):299-309
This work designed and tested a shelter to protect a passive sampler for measuring coarse particulate matter, PM 10 - 2.5 . The shelter protects the sampler from precipitation and reduces the effects of wind on the deposition of particles to its collection surface. Six shelters were tested in a wind tunnel at three wind speeds: 2, 8, and 24 km hr -1 . Shelter performance was expressed as the ratio of PM 10 - 2.5 measured with the passive samplers to that measured with a filter-based dichotomous sampler. For most shelters, the PM 10 - 2.5 ratio averaged across wind speeds was well above one (2.4 to 8.5) and was generally dependent on wind speed. However, the PM 10 - 2.5 ratio for one shelter, the Flat Plates shelter, was 1.04 with substantially less effect on particle deposition from wind speed. Eight week-long field tests were conducted to compare PM 10 - 2.5 measured with a passive sampler installed in a Flat Plates shelter to that measured with a collocated filter-based dichotomous sampler. In these tests, the mean PM 10 - 2.5 ratio was 1.29. The linear relationship between PM 10 - 2.5 measured passively to that measured with the filter-based sampler had a Pearson correlation coefficient of 0.97 and was not significantly affected by the addition of weekly mean wind speed (p = 0.35). Although temperature was significant in this regression model (p = 0.02), it only improved the relationship marginally. The passive sampler in a Flat Plates shelter offers an inexpensive means to assess ambient PM 10 - 2.5 without on-site measurement of wind speed.
Protective equipment; Samplers; Equipment design; Equipment testing; Performance tests; Air flow; Climatic factors; Equipment reliability; Performance capability; Measurement equipment; Sampling; Particle aerodynamics; Particle diameter; Particulate sampling methods; Environmental factors; Particulate dust; Particulates; Respirable dust
Thomas M. Peters, University of Iowa, 102 IREH, 100 Oakdale Campus, Iowa City, IA 52242
Publication Date
Document Type
Journal Article
Email Address
Funding Type
Fiscal Year
Identifying No.
Issue of Publication
Source Name
Aerosol Science and Technology
Performing Organization
University of Iowa
Page last reviewed: October 28, 2022
Content source: National Institute for Occupational Safety and Health Education and Information Division