Evaluation of Low-Cost Sensors for Ambient PM_2.5 Monitoring

Figure 5

Results of linear fittings for 1-hour averaged data: (a) SDS011 (Nova Fitness), (b) ZH03A (Winsen), (c) PMS7003 (Plantower), and (d) OPC-N2 (Alphasense).

(a)

(b)

(c)

(d)