Temasek Poly catches students vaping during trial of detectors; schools show interest in devices The Straits Times 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 Can a Vape Detector Detect Cigarette and Marijuana Smoke? Will Vaping Set Off Hotel Smoke Alarms? Vape Detectors & Cigarette Smoke Detectors Vape Detectors & Cigarette Smoke Detectors