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Mining Publication: Performance of a Light Scattering Dust Monitor at Various Air Velocities: Results of Sampling in the Active Versus the Passive Mode
Keywords: Airflow Dust control Light scattering dust monitors Respirable dust Respirable dust level 
 Sampling
Original creation date: January 2007
Authors: JM Listak, GJ Chekan, JF Colinet, JP Rider
Peer Reviewed Journal Article - January 2007
Download PDF Document (2.42 MB)
NIOSHTIC2 Number: 20032486
Int J Miner Res Eng 2007 Jan-Mar; 12(1):35�47
The Respiratory Hazards Control Branch of NIOSH routinely conducts laboratory and mine-site evaluations of dust control technologies. Gravimetric and instantaneous dust sampling instruments are used in these evaluations to measure and document dust levels to determine worker exposure. The Thermo personal DataRam (pDR) is an instantaneous sampler that uses light-scattering technology to provide relative measures of airborne respirable dust. The pDR can be used in active and passive modes to measure respirable dust levels. Tests were conducted to evaluate the sampling performance of active and passive pDR operation relative to each other and against a gravimetric sampler (the accepted standard for respirable dust measurement). The purpose of the test was to determine if the pDR can be used effectively in the passive mode in higher velocity airflows (up to 5.1 m/s (1000 fpm)). Studies of the pDRs in both modes of operation were conducted in a controlled laboratory environment and in field situations. Dust measurements using pDR units in both modes of operation were recorded in velocities ranging from 1.0 to 5.1 m/s (200 to 1000 fpm). Tests were conducted in ambient air and in air with the addition of moisture. Results show that, although the units measure different concentrations in their respective modes of operation as compared to a gravimetric sample, the relative readings can be corrected to yield accurate dust measurements.
Image of publication Performance of a Light Scattering Dust Monitor at Various Air Velocities: Results of Sampling in the Active Versus the Passive ModePeer Reviewed Journal Article - January 2007
Download PDF Document (2.42 MB)
NIOSHTIC2 Number: 20032486
Int J Miner Res Eng 2007 Jan-Mar; 12(1):35�47
See Also
Benchmarking Longwall Dust Control Technology and Practices
Controlling Respirable Dust in Underground Coal Mines in the United States
Determining the Spatial Variability of Personal Sampler Inlet Locations
Dust Considerations When Using Belt Entry Air to Ventilate Work Areas
The Effects of Water Spray Placement for Controlling Respirable Dust and Face Methane Concentrations
Field Evaluation of Air-blocking Shelf for Dust Control on Blasthole Drills
Laboratory Evaluation of Shield Dust Entrainment in High-Velocity Airstreams
Laboratory Testing To Quantify Dust Entrainment During Shield Advance
Sonic Anemometer Airflow Monitoring Technique for Use in Underground Mines
Status of a Tapered Element, Oscillation Microbalance-Based Continuous Respirable Coal Mine Dust Monitor
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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