Safe Signal Sprinkler WFD40N 4" Water Flow Detector 2-SPDT

The Safe Signal Sprinkler WFD40N Water Flow Detector is used to detect water flow in sprinkler systems to provide safety in case of fire. It has a 2-SPDT switch and can be used with 4-inch pipes. It is used to measure the flow of water in the pipe and produce an alarm sound once the flow rate is high. It switches on to give an alert and to detect any system problem or failure in advance. Advantages include improvement of fire resistance, ensuring the effectiveness of sprinkler systems, and compatibility with HVAC systems to improve building security.