Have you ever been in a modern building and noticed little round sensors protruding from the walls? Chances are you’ve seen a Simplex Duct Detector. The official business definition of a Simplex Duct Detector is ‘a piece of safety equipment that monitors air pressure changes in ducts for fire protection and other applications’. In simpler terms, Simplex Duct Detectors are vital pieces of equipment that provide a comprehensive solution to fire prevention. By accurately detecting changing air pressures in air-driven systems such as HVAC ducts, they provide an essential sense of security and peace of mind. This means developers, architects, engineers and facility managers have another tool to protect against hazardous conditions in commercial spaces.