3 ms·
There are lots of ~$150 meters on Amazon. (e.g. https://www.amazon.com/GZAIR-Temperature-Relative-Humidity-0-9999ppm/dp/B0829ZWQVP/ https://www.amazon.com/GZAIR
by pbadg3r 6y ago
There are lots of ~$150 meters on Amazon. (e.g. https://www.amazon.com/GZAIR-Temperature-Relative-Humidity-0-9999ppm/dp/B0829ZWQVP/ https://www.amazon.com/GZAIR-Temperature-Relative-Humidity-0...) I've used some of these meters and the quality you can get for $150 is surprising! I've basically just held meters near filters, windows, and fans to understand air quality.