That single station at Haig Road mcm Singapore government release income statistics - say average increasing, median increasing etc etc   But never show the spike like this station  This sensor mcm different - every few hours, AQICN system or itself it auto-calibrate - see if got record low readings earlier - then adjust 1 shot into 1 big 1000-1200+ reading. The average is in line but that spike like bad for the heart    https://www.instagram.com/reel/Dejj8jsOAAy/

explore, cause free     me too cheapskate