A modern-day vape detector can run on battery power

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

A modern-day vape detector can run on battery power, enabling flexible positioning in washrooms and locker spaces without costly circuitry or renovations.