Fire sprinklers don't activate from smokethey respond to heat. Each sprinkler head has a small glass bulb filled with a special liquid. When the temperature reaches around 155165F (6874C), the liquid expands Soo im trynna smoke inside but im worried that this thing detects smoke does it or? : r trees Do Smoke Detectors Detect Vape? A Guide About Smoke Detectors are Set Off by Vapes UPENDS Do Sprinklers Detect Smoke? Fire Sprinkler FAQs Do Vapes Set Off Smoke Alarms? What You Should Know