What do you want to measure? Saying you need it to be super accurate doesn't mean much on its own. Air quality is subjective in any case. The BME680 (like othe

What do you want to measure? Saying you need it to be super accurate doesn't mean much on its own. Air quality is subjective in any case. The BME680 (like other chips) measures VOC content - organic stuff like alcohol. You can also measure dust concentration, for example if you lived in China, PM2. 5 would be good to know. And you can also use CO2 concentration, but good CO2 sensors cost a lot. Some chips measure "equivalent CO2" but it's not the same.