Get a Dylos DC1100 Pro, costs around $250 and works great. It measures particles...

		dxhdr on June 24, 2017 \| parent \| context \| favorite \| on: Smog in our brains Get a Dylos DC1100 Pro, costs around $250 and works great. It measures particles only, not gases or radiation. A large HEPA filter in a closed room will remove most PM2.5 particles. That monitor will show you what's going on.