Using a new, low-cost air quality sensor to quantify second-hand smoke (SHS) levels in homes

Semple, Sean; Ibrahim, Azmina Engku; Apsley, Andrew; Steiner, Markus; Turner, Steven

doi:10.1136/tobaccocontrol-2013-051188

Cited by 81 publications

(83 citation statements)

References 16 publications

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“…The Dylos has been applied by other researchers in different settings, both indoors (Semple et al, 2012(Semple et al, , 2013 and outdoors (Northcross et al, 2013). In these contexts, it has been evaluated against the TSI SidePak and TSI DustTrak.…”

Section: Equivalent Monitoring Methodsmentioning

confidence: 99%

“…The Dylos has been used and evaluated in other studies, both indoors and outdoors, e.g. by Semple et al (2012Semple et al ( , 2013, in the context of exposure to SHS, and by Northcross et al (2013) and Holstius et al (2014) who compared the performance of the Dylos against other commercially-available particle monitors (both for chamber and ambient environments).…”

Section: Portable Monitoring Solutionmentioning

confidence: 99%

“…An additional result from the validation process was the development of two functions to derive PM 2.5 mass concentration from the PNCs monitored with the Dylos, following a similar approach documented by Semple et al (2012Semple et al ( , 2013. Air quality guidelines and health metrics typically refer to particle mass concentrations so it is helpful to provide data as calculated PM 2.5 mass concentrations.…”

Section: Deriving Calculated Pm 25 Mass Concentration From Pncsmentioning

confidence: 99%

“…The functions were allocated according to the type of class the person has spent time in. Table 1 displays the functions derived by (a) Semple et al (2013) which is applied to all Indoor environments, as well as the functions derived for (b) Outdoor rural (based on the data from Auchencorth Moss) and (c) Outdoor urban (based on the data from St. Leonards).…”

Section: Deriving Calculated Pm 25 Mass Concentration From Pncsmentioning

confidence: 99%

“…In the following the instrument is referred to as the Dylos. This device, which has already been successfully applied in studies assessing second-hand smoke (SHS) exposure (Semple et al, 2012(Semple et al, , 2013, has distinct advantages over other small and lightweight equipment typically used in occupational exposure assessments. The Dylos produces low, barely audible, noise levels and the ease of operation reduces the burden on the participants and enables volunteers to carry it without substantially interfering with their daily routine.…”

mentioning

confidence: 99%

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Personal exposure monitoring of PM 2.5 in indoor and outdoor microenvironments

Steinle

Reis

Sabel

et al. 2015

Science of The Total Environment

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267

178

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Adverse health effects from exposure to air pollution are a global challenge and of widespread concern. Recent high ambient concentration episodes of air pollutants in European cities highlighted the dynamic nature of human exposure and the gaps in data and knowledge about exposure patterns. In order to support health impact assessment it is essential to develop a better understanding of individual exposure pathways in people's everyday lives by taking account of all environments in which people spend time. Here we describe the development, validation and results of an exposure method applied in a study conducted in Scotland. A low-cost particle counter based on light-scattering technology - the Dylos 1700 was used. Its performance was validated in comparison with equivalent instruments (TEOM-FDMS) at two national monitoring network sites (R(2)=0.9 at a rural background site, R(2)=0.7 at an urban background site). This validation also provided two functions to convert measured PNCs into calculated particle mass concentrations for direct comparison of concentrations with equivalent monitoring instruments and air quality limit values. This study also used contextual and time-based activity data to define six microenvironments (MEs) to assess everyday exposure of individuals to short-term PM2.5 concentrations. The Dylos was combined with a GPS receiver to track movement and exposure of individuals across the MEs. Seventeen volunteers collected 35 profiles. Profiles may have a different overall duration and structure with respect to times spent in different MEs and activities undertaken. Results indicate that due to the substantial variability across and between MEs, it is essential to measure near-complete exposure pathways to allow for a comprehensive assessment of the exposure risk a person encounters on a daily basis. Taking into account the information gained through personal exposure measurements, this work demonstrates the added value of data generated by the application of low-cost monitors.

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Section: Equivalent Monitoring Methodsmentioning

confidence: 99%