3 ms·
Yeah I lived maybe 100 meters from a busy road so I bought an air cleaner out of concern, but also got an Arduino with a serial device monitoring PM 2.5. PM 2.5
by porknubbins 5y ago
Yeah I lived maybe 100 meters from a busy road so I bought an air cleaner out of concern, but also got an Arduino with a serial device monitoring PM 2.5. PM 2.5 was always low teens or single digits, until I blew out a match next to the device and it went to 100s but dipped very quickly, so I think particulates aren't the biggest concern in most houses, unless maybe they spend all day with the windows open.
- eurasiantiger 5y agoHow do you know your measurements are accurate?
- Johnny555 5y agoI tested my indoor sensor (Davis Airlink) by comparing to others in my neighborhood -- I set it up outside on the first bad air quality day we had and an hour later it was with 5 AQI points of the 4 PurpleAir sensors within a quarter mile. Certainly not professional level calibration, but shows that it's within the ballpark. Unfortunately I don't think there's an official EPA monitoring station within 10 miles so I can't really check it against a calibrated monitor.
- porknubbins 5y agoAside from trying to buy a commonly used reliable device, that what the match test was for. When my device was reading 12ppm pm2.5 and a blown out match made it read in the 100s clearly the device is working to some degree of accuracy. I could've checked it outside I guess but I think local air conditions would predominate over any official city average I could have compared it against.