The red dot of the fire sprinkler blinks with a red or two-color indicator. It blinks once every 30 to 50s for functional inspection of system devices.
The common fire sprinkler used by the fire sprinkler is under the action of heat, according to the pre-set temperature range, or according to the fire signal control equipment to start, if the preset temperature is exceeded, the sprinkler starts to spray water, which is part of the spray system.