This smoke alarm sounds an early warning in the presence of smoke and fire. In the event of a fire, the smoke alarm triggers a loud siren and a blinking red display light. That gives anybody present the chance to get themselves and others into safety, notify the fire department or take measures to extinguish the fire themselves. The smoke alarm has an optical sensor which detects smoke as it enters the interior of the device. Integrated temperature sensors also register changes in room temperature. A processor analyses the information gathered by the optical and temperature sensors. Combining this data from two sources puts it in a position to determine whether the situation at hand might be an emergency.