UL/FM Approved Waterflow Detector (often called a waterflow switch) is a mechanical-electrical device installed on a fire sprinkler pipe. Its sole purpose is to detect a minimum rate of water flow and send an electrical signal to the fire alarm control panel (FACP), which then initiates the building's fire alarm sequence (horns, strobes, and notification to monitoring services).
The product has simultaneously obtained UL and FM dual certifications, which means it meets the highest levels of safety, performance and reliability standards, and is a symbol of high quality.
