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 as a result of warmth from a fire under, it expands, shatters the glass bulb, and triggers the sprinkler head. The fire sprinkler swap senses this movement of h2o and transmits a signal on the fire alarm u