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Types of smoke alarms: which sensors fit the job?

It depends on the work: Photoelectric suits an alarm "less likely to nuisance alarm during cooking" (CPSC, 2016). The right choice depends on nuisance alarm during cooking.

How we know: By . · Sources read: 23 October 2026 · Updated 27 October 2026

CPSC (2016): combination smoke alarms "combine ionization and photoelectric detectors into one unit, called dual sensor smoke alarms".
TypeBest forMain advantagesMain drawbacks
Ionizationno official source names oneCPSC (2016): "Ionization detectors respond quickly to flaming fires that give off heat and hot gases with smaller (sub-micron) combustion particles …"; CPSC (2016), in a fast moving flaming fire: "An ionization smoke alarm may be seconds faster than a photoelectric smoke alarm"CPSC (2016): "Do not install an ionization smoke alarm in or near the kitchen because it is more likely to nuisance alarm during cooking."
Photoelectrican alarm "less likely to nuisance alarm during cooking" (CPSC, 2016)CPSC (2016): "… photoelectric detectors respond more quickly to smoldering fires that give off larger combustion particles."; CPSC (2016): "A photoelectric smoke alarm can sometimes be many minutes faster than an ionization smoke alarm in responding to a smoldering fire."no official source names one
Dual sensorno official source names oneCPSC (2016) recommends: "Install both ionization and photoelectric type smoke alarms on every level of the home."no official source names one

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