A device which detects the visible particle of combustion is a ____ detector.

A device which detects the visible particle of combustion is a ____ detector.

• A. Heat
• B. Smoke
• C. Flame
• D. CO

Answer: (B)

When combustion produces smoke, tiny solid and liquid particles are released into the air. A detector that senses these particulates is a smoke detector, which can use either light-based sensing (detecting smoke particles that scatter light) or ionization to notice the interruption caused by smoke. This is different from a heat detector, which reacts to a rapid temperature rise; a flame detector, which looks for radiant energy from flames; and a carbon monoxide detector, which senses the gas CO rather than particles. So the device that detects the visible particle of combustion is a smoke detector.

When combustion produces smoke, tiny solid and liquid particles are released into the air. A detector that senses these particulates is a smoke detector, which can use either light-based sensing (detecting smoke particles that scatter light) or ionization to notice the interruption caused by smoke. This is different from a heat detector, which reacts to a rapid temperature rise; a flame detector, which looks for radiant energy from flames; and a carbon monoxide detector, which senses the gas CO rather than particles. So the device that detects the visible particle of combustion is a smoke detector.