Smoke, cause a fire sprinkler. Most fire sprinkler heads come Outfitted which has a glycerin-stuffed glass bulb. As being the glycerin heats up as a result of heat from a fire below, it expands, shatters the glass bulb, and triggers the sprinkler head. The fire sprinkler swap senses this flow https://wirelessfirealarmsystems57890.humor-blog.com/34242955/little-known-facts-about-wireless-fire-alarm-systems