A fire detector is a device that detects the presence of smoke or heat, and triggers an alarm to warn people of a potential fire. Fire detectors are an important part of fire safety, as they can provide early warning of a fire, giving people time to evacuate and call for help.
Fire detectors are typically installed on ceilings or walls in homes and businesses. They can be powered by batteries or by the electrical system of the building. There are two main types of fire detectors: smoke detectors and heat detectors. Smoke detectors detect the presence of smoke, while heat detectors detect the presence of heat.