You can build your own air quality sensor with our instructions. Our sensor uses the same PM sensor like in the purple air. You can build it for <USD 20.
BTW: Our main product is an air quality monitoring service specifically designed for schools. Since we are just starting, I would love to talk to parents, teachers etc. from schools that want to monitor their air quality better. Please contact me if you are interested to talk!
https://www.airgradient.com/diy/
BTW: Our main product is an air quality monitoring service specifically designed for schools. Since we are just starting, I would love to talk to parents, teachers etc. from schools that want to monitor their air quality better. Please contact me if you are interested to talk!