Which of the following is not a notification device?

• A. Smoke detector
• B. Horn
• C. Speaker
• D. Strobe

Answer: (A)

Not a notification device means it doesn’t itself warn occupants. A smoke detector is a sensing/initiating device: it detects smoke and signals the fire alarm control panel to start the alert sequence. The actual warnings come from notification appliances—horns (sound), strobes (visual), and speakers (voice or alarm messages). So, while horns, strobes, and speakers directly notify occupants, the smoke detector’s role is to sense conditions and trigger the notification system.