煙えん探たん知ち器き

noun

smoke detector; smoke alarm

A device that detects smoke and typically sounds an alarm. Used in homes and buildings for fire safety.

• 煙えん探たん知ち器きが鳴なったので、すぐに外そとへ避ひ難なんした。

  The smoke detector went off, so we evacuated outside immediately.

• この建たて物ものには煙えん探たん知ち器きが設せっ置ちされています。

  Smoke detectors are installed in this building.