Fig. 3
Validity assessment of Pocket PM2.5 Sensor: correlation between PM-712, Kimoto and Pocket PM2.5 Sensor. To prove validity of Pocket PM2.5 Sensor for measuring PM2.5 concentration, we compared the data from PM-712, Kimoto, a fixed real-time monitor which was set up in Air Quality Research Station, NIES, Tsukuba, Japan (http://www.nies.go.jp/aqrs/index.html) and Pocket PM2.5 Sensor simultaneously. PM-712, Kimoto recorded one hourly while Pocket PM2.5 Sensor recorded every second, and we calculated average hour value