Hi @rossko57,
the MICS6814 has 3 different sensors, one for reducing gases, one for oxidising gases and one for NH3. Depending on what you’d like to “convert” (I’m writing this in " ", because I don’t think that this citizen science device will be able to replace professional sensors that are thoroughly calibrated) you’ve to apply your individually generated exponential curves.
For the moment I’m therefore “converting” CO and NO2.
Hi @John_Siemon,
as it’s my first touching point with that stuff (enviromental data on a citizen science base) I wanted to start a small project because I’m interested in such appliances (especially for Raspberry). I read an article about the Enviro+ sensor board in a Pi magazine and ordered it with the intention to..
- learn sth about enviromental data
- learn a bit of Python
- make use of a MQTT broker
- play around with my unused RPI
Thanks for clarifying how it’s properly done - for the moment I’m trying to calibrate NO and CO2 as there’s a professional station around that provides official calibrated and open data.
CO (my reading/conversion): 0.344ppm
NO2 (my reading/conversion): 0.005ppm
CO (official): 0.3mg/m³ eq. ~ 0.262ppm @ 28.01 g/mol
NO2 (official): 9µg/m³ eq. ~ 0.005 ppm @ 46.01 g/mol
So I’ll tweak a bit to get that CO right and then I guess I’m done.
Finally, something I’d like to add here - of course I don’t have intentions to take that collected data serious in any way. For me it’s a project that helps me learning new stuff with the idea to get a rough idea if air quality is improving or worsening.
Have a nice day and KR,
Chris