Research Article
Evaluation of Low-Cost Sensors for Ambient PM2.5 Monitoring
Figure 7
The distribution of relative error of PM2.5 estimation over the mass concentrations measured by TEOM in case of (a) SDS011 (Nova Fitness), (b) ZH03A (Winsen), (c) PMS7003 (Plantower), and (d) OPC-N2 (Alphasense). Please note the different scales on the -axes.
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