A device that detects fire and sounds an alarm; commonly installed as a safety device in buildings.
アパートの廊下で火災報知機が鳴ったので、住民は避難した。
The fire alarm went off in the apartment corridor, so the residents evacuated.
消防点検のため、学校の火災報知機を一時的に作動させました。
For a fire inspection, the school's fire alarm devices were temporarily activated.
古いビルなので火災報知機の設置状況を確認しておいてください。
It's an old building, so please check the status of the fire alarm installations.