When we started building the AirGradient Go, we had a clear idea of what we wanted: a portable, open-source air-quality monitor that is transparent in its design decisions and genuinely useful outside a lab. The Go is meant to be carried - from room to room, into a restaurant, onto the street, into a car, back home. Portability is the entire point.
Great investigation, and quite striking results (I’d have expected much closer behaviours). I really hope the S12 is the device chosen in the end, as it appears to be the clear better option for a mobile product per this analysys.
But talking about calibration with “outside air” – isn’t it about time we updated the “reference” to 430 or even 440 ppm instead of 400 ppm? The last time average world levels were at that point was in 2016, and as you know there’s this thing going on where it seems to keep growing year after year… latest measurements being consistently over 430 ppm:
I realise it doesn’t matter much for measuring air quality indoors, where we’re looking at thousands of ppm, but still… accuracy matters 