Easy test to see if the PM 2.5 is fake: Blow an aerossol nearby (e.g., deodorant). That usually makes my PM 2.5 sensors go from 002 to 300+
For CO2, just literally breath onto the case. Should drive it above 1k
Easy test to see if the PM 2.5 is fake: Blow an aerossol nearby (e.g., deodorant). That usually makes my PM 2.5 sensors go from 002 to 300+
For CO2, just literally breath onto the case. Should drive it above 1k