Vape detection algorithms examine particle size, density

https://markets.businessinsider.com/news/stocks/zeptive-software-update-boosts-vape-detection-performance-and-adds-new-features-free-update-for-all-customers-with-zeptive-s-custom-communications-module-1035951542

Vape detection algorithms examine particle size, density, and chemical signatures to distinguish e-cigarette vapor from daily aerosols.