Ionization vs Photoelectric Smoke Detectors: Which Is Better?

Name: Darb Al-Salamah wal-Aman Contracting
Address: Jeddah, Makkah Province, Saudi Arabia, Jeddah, Makkah Province, SA
Telephone: +966 55 800 8895
Price range: $$

Ionization Detector Principle

Contains a small radioactive source that ionizes air. Smoke disrupts this current, triggering the alarm. Best for fast-flaming fires.

Photoelectric Detector Principle

Uses a light beam — smoke scatters light to reach a sensor and triggers the alarm. Best for slow-smoldering fires.

Recommendation

NFPA recommends combining both types or using dual-sensor detectors for maximum protection.