How do vape detectors work: What to know about vape sensors HALO Smart Sensors Detect and Reduce Vaping in Schools, Hotels, Offices, and Healthcare Environments Surveillance Secure Understanding Vape Smoke Detectors: A Comprehensive Guide Key Security 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.