fire sprinkler guard help page
Fire Sprinkler heads are color coded for Fahrenheit temperature by the color of liquid in the bulb. An orange colored liquid in the bulb means it is rated at 135 degrees, red 155, green 200, and blue 286. If the temperature of the sprinkler head reaches the color coded temperature, the bulb will break and the fire sprinkler will activate. Other sprinklers in the area will not begin to dispense water unless each individual sprinkler head reaches the specified temperature for which it is rated.
For more help and to purchase fire sprinkler heads on-line, visit Swift Fire Protection Website.