I want (in fact, I need, because of my sensitivity to CO2 levels) a nicely working CO2 sensor in my room. I tried a few cheaper options, but they didn't work as

I want (in fact, I need, because of my sensitivity to CO2 levels) a nicely working CO2 sensor in my room. I tried a few cheaper options, but they didn't work as reliably. I did my research, and it was either NetAtmo or some industrial-grade sensors, more expensive and ugly.