RESPIRABLE SILICA DUST MONITOR

Sensor Selection to Improve Estimates of Particulate Matter Concentration from a Low-Cost Network

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Sousan, Gray, Zuidema, Stebounova, Thomas, Koehler, Peters, MDPI

But the OSHA Silica in Construction Standard implies that competent persons must know concentrations of silica in real-time

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See Quartz-Busters, The Synergist, February 2019, Bender/Trujillo/Ewert

A true understanding of exposure requires more than one data point

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See The Rules of the Game: An Analysis of OSHA's Enforcement Strategy, American Journal of Industrial Medicine, 1984, S.M. Rappaport, PhD

Evaluation of a Low-Cost Aerosol Sensor to Assess Dust Concentrations in a Swine Building

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Say something interesting about your business here.

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Linear Relation

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Visibly identify areas or tasks of concern

Sources of error & variability in pM, Zuidema et al, JOEh'19

Indicative Monitoring

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Maps of gravimetric-equivalent mass concentrations produced using a single, mean CF (correction factor) are qualitatively similar to those produced using location-specific CFs.

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Correction factors are recommended for each aerosol.  An average CF should be calculated from at least three samples

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Other particles

For daily exposure control, inexpensive real-time measuring methods are preferable

Both instruments have the ability to obtain real-time results in situ, an important advantage over (gravimetric) other methods, which allows for immediate detection of unexpected emissions.  In addition they are relatively inexpensive, compact and portable.


To obtain accurate CNT mass measurements, a correction that considers the instrument's CNT-specific response is required.


Evaluating the capabilities of portable black carbon monitors and photometers for measuring airborne carbon nanotubes, 2013, Journal of Nanoparticle Research, Isamu Ogura et al

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More Carbon-based particles

Direct-Reading

The photometer with default factory calibration provided a reasonable estimate of respirable CNF concentrations and will likely be the instrument of choice for direct-reading monitoring of CNFs in future studies of this type.


Aerosol monitoring during carbon nanofiber production: Mobile direct-reading sampling, 2010, Annals of Occupational Hygiene, Douglas E Evans et al.