Little Known Facts About wireless fire alarm systems.
smoke, cause a fire sprinkler. Most fire sprinkler heads come Outfitted using a glycerin-filled glass bulb. Given that the glycerin heats up mainly because of the heat from a fire down below, it expands, shatters the glass bulb, and triggers the sprinkler head. The fire sprinkler swap senses this flow of h2o and transmits a sign on the fire alarm c