Smoke Alarm +
![Smoke Alarm](https://files.ozbargain.com.au/t/59/83959.jpg?h=14dd2e4e)
A smoke detector is a device that senses smoke, typically as an indicator of fire. Commercial security devices issue a signal to a fire alarm control panel as part of a fire alarm system, while household detectors, known as smoke alarms, generally issue a local audible or visual alarm from the detector itself.