Unexpected charges are piling up at hotels across the country as new smoking detection sensors raise questions about accuracy. Can Hotels Tell If You Vape? LOOKAH Hotel Vape Detectors and Nicotine Sensors: Complete Guide How Hotels Detect Smoking: From Traditional Methods to Detection Technology 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.