2021 BRN Discussion, page-8771

Given @Mr Tech Ladens mention of BOSCH, I'd say this article is rather interesting?

4 in 1 Digital nose sensor -

https://www.eejournal.com/industry_news/digital-nose-for-air-quality-bosch-sensortecs-4-in-1-gas-sensor-with-ai/

The optimal approach is to collect indicative real-life data directly in the field. For instance by sampling gases in the vicinity of both fresh and decaying food, to thereby create different combination models for the VSCs present in the given air sample.

The BME688 is capable, by default, of very accurate detection of VSCs, and the BME AI-Studio enables it to be optimized for other gas mixtures and applications.

By sampling gases in the field instead of the lab, the derived algorithms that are utilized by the new detection devices are far more reliable in evaluating actual conditions. Together with gas data, the BME688 simultaneously measures humidity, barometric pressure and temperature as supplementary data inputs for complete AI modeling.