Vape Detectors in Schools: How Do They Work? Can Vaping Set Off a Fire Alarm? Understanding the Risks Eliquidstop False positives in vape detectors are a common concern, particularly when the devices are placed in environments with factors that can mimic vaping aerosols., , Common causes include:, Aerosols A pair of hackers found that a vape detector often found in high school bathrooms contained microphonesand security weaknesses that could allow someone to turn it into a secret listening device. Does Vape Smoke Set Off Fire Alarms Can Smoke Detectors Detect Vaping? Learn the Facts