THE 2-MINUTE RULE FOR FIRE ALARM SYSTEMS

smoke, trigger a fire sprinkler. Most fire sprinkler heads appear equipped that has a glycerin-filled glass bulb. As being the glycerin heats up a result of the warmth from a fire underneath, it expands, shatters the glass bulb, and triggers the sprinkler head. The fire sprinkler switch senses this stream of water and transmits a signal into the fi