Table 2: Coefficients of variation (CV, %) for tested PM sensors.

Sensor modelSDS011ZH03APMS7003PMS7003 “AE”OPC-N2

CV, %6.5354.1/10.86.745.9420.0

CV calculated only for two units for the period 21 August 2017–24 December 2017; CV calculated for three units after replacement of unit no. 1 and no. 2 on 08 January 2018.