Does anyone know if Vape smoke will set off this hotel fire alarm? : r Vaping Can Hotels Detect Vaping? Everything You Need to Know Can Hotels Tell If You Vape? LOOKAH 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 Vape Detector Vape, THC and Aggression Smart Sensor Ecl ips Your guests aren't the only ones checking in. So are their vape pens. With over 13 million regular vapers in the U.S. alone, unauthorized vaping is a major operational risk for hotels.