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Notebook Paper

Development of a low-cost air sensor package and indoor air quality monitoring in a California middle school: Detection of a distant wildfire

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Pages 1015-1022 | Received 04 Mar 2019, Accepted 15 May 2019, Published online: 17 Jul 2019

Figures & data

Figure 1. The sensor package used in this study. The figure shows the sensors as well as their spatial arrangement into a compact package that can be easily moved to a desired location with electricity.

Figure 1. The sensor package used in this study. The figure shows the sensors as well as their spatial arrangement into a compact package that can be easily moved to a desired location with electricity.

Table 1. Information on the sensors used in this study.

Figure 2. Typical CO2 and PM number concentration at AMS prior to the Camp Fire. (a). Wednesday, October 01, 2018, (b). Wednesday, October 3, 2018, and (c). Saturday, October 6, 2018. In (a) and (b), the vertical-dashed lines are the school period demarcations. The leftmost line represents the beginning of the school (8 a.m.) and the rightmost line the end (2:10 pm on Wednesdays and 3:05 pm other days). The black solid line is for CO2 (ppm), and the black-dashed line is for PM (#/m3 for particles with diameter >0.3 µm). The periods where there are no scheduled classes in this room (including the lunch period) are shaded.

Figure 2. Typical CO2 and PM number concentration at AMS prior to the Camp Fire. (a). Wednesday, October 01, 2018, (b). Wednesday, October 3, 2018, and (c). Saturday, October 6, 2018. In (a) and (b), the vertical-dashed lines are the school period demarcations. The leftmost line represents the beginning of the school (8 a.m.) and the rightmost line the end (2:10 pm on Wednesdays and 3:05 pm other days). The black solid line is for CO2 (ppm), and the black-dashed line is for PM (#/m3 for particles with diameter >0.3 µm). The periods where there are no scheduled classes in this room (including the lunch period) are shaded.

Figure 3. CO2 and PM number concentrations during the week of 10/01/2018 prior to the wildfire.

Figure 3. CO2 and PM number concentrations during the week of 10/01/2018 prior to the wildfire.

Figure 4. The CO2 and PM number concentrations at AMS during the Camp Fire (November 8–21, 2018).

Figure 4. The CO2 and PM number concentrations at AMS during the Camp Fire (November 8–21, 2018).

Figure 5. Comparison of AMS particle number measurement (solid black line) with BAM readings (black stars and dots) for PM2.5 mass.

Figure 5. Comparison of AMS particle number measurement (solid black line) with BAM readings (black stars and dots) for PM2.5 mass.

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