Development of the chemical exposure monitor with indoor positioning (CEMWIP) for workplace VOC surveys

Journal of Occupational and Environmental Hygiene
K K BrownA R Brandes

Abstract

The purpose of this article was to research and develop a direct-reading exposure assessment method that combined a real-time location system with a wireless direct-reading personal chemical sensor. The personal chemical sensor was a photoionization device for detecting volatile organic compounds. The combined system was calibrated and tested against the same four standard gas concentrations and calibrated at one standard location and tested at four locations that included the standard locations. Data were wirelessly collected from the chemical sensor every 1.4 sec, for volatile organic compounds concentration, location, temperature, humidity, and time. Regression analysis of the photo-ionization device voltage response against calibration gases showed the chemical sensor had a limit of detection of 0.2 ppm. The real-time location system was accurate to 13 cm ± 6 cm (standard deviation) in an open area and to 57 cm ± 31 cm in a closed room where the radio frequency has to penetrate drywall-finished walls. The streaming data were collected and graphically displayed as a three-dimensional hazard map for assessment of peak exposure with location. A real-time personal exposure assessment device with indoor positioning was practical...Continue Reading

References

Jun 22, 2001·The Annals of Occupational Hygiene·D L Bartley
Dec 12, 2001·International Journal of Dermatology·S A Grando
Jun 30, 2005·Journal of Environmental Monitoring : JEM·L A LeeJ L Hornsby-Myers
Oct 25, 2008·Journal of Occupational and Environmental Hygiene·Christopher C CoffeyStephen B Martin
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Jun 28, 2012·Atmospheric Environment·Cheng ChenErica Forzani

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Citations

Sep 19, 2019·Journal of Occupational and Environmental Hygiene·Kenneth K BrownPeter B Shaw
Nov 21, 2020·Annals of Work Exposures and Health·Henk GoedeAnjoeka Pronk

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Methods Mentioned

BETA
chip

Software Mentioned

Mocon
Linux
Ubisense
Excel
RTLS
MySQL
Apache Web Server
CEMWIP
Netgear

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