Does Vape Smoke Set Off Fire Alarms Can Smoke Detectors Detect Vaping? Learn the Facts I was reading a post from about a year ago. About the legitimacy of hotels having silent vape alarms. Well I just found one in my hotel. Discreetly attached to the back Vape Detectors in Schools: How Do They Work? 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