We tested 20 models to see which respond fastest to smoke.
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Overall score is based on smouldering and flaming fire sensitivity.
“Good” or “OK” meant the alarm sounded quickly enough to alert you to danger.
“Poor” meant the alarm took significantly longer to sound.
“Extreme” sensitivity meant the alarm sounded so quickly they are more likely to issue false alarms.
Ease of use includes instructions and ease of installation.
See "About our test" for more information.
Noise is measured in a quiet room 3m from the alarm.
Price is from a March 2018 price survey.
Good
Good
$149
Photoelectric
91
Sealed lithium
Standard
12
12
12
10
The identical PC-1 model, without grouping, is also available ($69).
Electrical trade stores.