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We've been on the hunt for the most accurate Air Quality Monitor since we've just moved to the Middle East and have had a really tough time finding something accurate. Aside from building one and having it receive questionable ratings, does anyone have any suggestions on a super reliable machine they've been happy with that has proven its accuracy in some way?

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Here’s a lab writeup comparing a few models from about a year ago:

https://smartairfilters.com/en/blog/are-cheap-particle-count...

Depending on which part of the Middle East you’re in, you may need a PM10 (dust) monitor. The devices here just do PM2.5 (smog).

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.

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