The sensor draws room air across a detection array on a continuous cycle. Vape aerosol carries a particulate profile and a chemical signature that ordinary bathroom air does not, and the array reads both. When a reading crosses the threshold set for that room, the sensor fires an alert.
Nicotine vapor and THC aerosol produce different signatures, and Triton separates them, so the alert tells an administrator which one triggered it before anyone walks down the hallway. That distinction matters for how a school responds. A nicotine incident and a cannabis incident sit at different points on most district discipline policies.