Smoke Detector A smoke detector or Head Detector is a device that detects smoke, or heat typically as an indicator of fire. Commercial, industrial, and mass residential devices issue a signal to a fire alarm system, while household detectors, known as smoke alarms, generally issue local audible and/or visual alarm from the detector itself. Most smoke detectors work either by optic... https://www.sritrivenicrafts.com/fire-alarm-system/