THE FIRE ALARM SYSTEMS DIARIES

smoke, cause a fire sprinkler. Most fire sprinkler heads arrive Geared up with a glycerin-crammed glass bulb. Because the glycerin heats up as a result of warmth from a fire underneath, it expands, shatters the glass bulb, and triggers the sprinkler head. The fire sprinkler change senses this move of drinking water and transmits a sign for the fire