Ionization smoke detectors vs. Photoelectric type smoke detectors - what is the difference?

There are generally two types of smoke detectors - ionization smoke detectors and photoelectric type smoke detectors. Smoke particles of a varying number and size are produced in all fires. Ionization technology smoke detectors are generally more sensitive than photoelectric technology smoke detectors at sensing small particles, which tend to be produced in greater amounts by hot, flaming fires, that are consuming combustible materials rapidly and may spread quickly. Sources of these fires may include paper burning in a wastebasket, or a grease fire in the kitchen. Photoelectric smoke detector technology is generally more sensitive than ionization smoke detector technology at sensing large smoke particles, which tend to be produced in greater amounts by smouldering fires, which may smoulder for hours before bursting into flame. Sources of these fires may include cigarettes burning in couches or bedding. For maximum protection, use both types of technology on each level and in every bedroom of your home.