Which sprinklers use color-coded liquid to indicate operating temperature?

Which sprinklers use color-coded liquid to indicate operating temperature?

• A. Bulb-type sprinklers
• B. Water meters
• C. Color identification
• D. Concealed sprinklers

Answer: (A)

Bulb-type sprinklers use a small glass bulb filled with a color-coded liquid. When temperatures reach the bulb’s rated point, the liquid expands, the bulb breaks, and the sprinkler releases. The color of the liquid indicates the operating temperature rating, so installers and inspectors can identify the response temperature at a glance. Other options don’t involve a color-coded liquid in a glass bulb as the activation method—water meters aren’t related to sprinkler actuation, the term “color identification” isn’t a sprinkler type, and concealed sprinklers use a different mechanism with the temperature rating shown elsewhere rather than via a color-coded liquid in a bulb.

Bulb-type sprinklers use a small glass bulb filled with a color-coded liquid. When temperatures reach the bulb’s rated point, the liquid expands, the bulb breaks, and the sprinkler releases. The color of the liquid indicates the operating temperature rating, so installers and inspectors can identify the response temperature at a glance. Other options don’t involve a color-coded liquid in a glass bulb as the activation method—water meters aren’t related to sprinkler actuation, the term “color identification” isn’t a sprinkler type, and concealed sprinklers use a different mechanism with the temperature rating shown elsewhere rather than via a color-coded liquid in a bulb.