Do Vapes Set Off Metal Detectors? Why They Trigger Alarms and What to Expect How Do Vape Detectors Work? [Answered 2026] Can Vape Trigger Smoke Alarm Do Vapes Set Off Metal Detectors? Why They Trigger Alarms and What to Expect Do Vapes Set Off Smoke Alarms? Royal Flush Vape UK Think vapes are harmless to your smoke alarms? Not always. Vapor clouds from ecigarettes can drift into smoke alarms and trigger false alarms, especially in smaller rooms. Even lighter vapes can Do Vapes Set Off Smoke Alarms? Royal Flush Vape UK