Can Hotels Tell If You Vape? (4 Ways) How Do Hotels Know If You Vape In Your Room HALO Smart Sensors Detect and Reduce Vaping in Schools, Hotels, Offices, and Healthcare Environments Surveillance Secure Vape Detector by Forensics for Schools, Home, Hotels, Business Cell Phone Alarms WiFi Laser Scattering Super Sensitive Sensor in Dubai UAE Whizz Smoke Detectors & Fire Alarms 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