Which PM2.5 meter do you have? I’ve been looking to buy one and AirThings keeps coming up.
I have a Temtop indoor air quality monitor. The exact model seems to have been discontinued but it can measure PM2.5 and formaldehyde.
I have a Temtop indoor air quality monitor. The exact model seems to have been discontinued but it can measure PM2.5 and formaldehyde.