What Vape Sensors can Detect Will Vaping Set Off Hotel Smoke 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 How do vape detectors work: What to know about vape sensors (REAL TEST) Can Smoke Detectors Detect Vape? (compared with a Vape Detector) 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.