First Alert 10-Year Battery Smoke Alarm
- Smoke Detectors & Fire Alarm
A dependable dual-sensor smoke alarm for households prioritizing broad fire detection over CO coverage in one unit.
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How it ranks among the 10 smoke detectors & fire alarms we track
4.5★ across 133 Amazon ratings, Bayesian-smoothed toward the category average.
133 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
500+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 10 smoke detectors & fire alarms we track - how the scorecard works · full smoke detectors & fire alarms data report. Confidence: limited - incomplete product information.Updated 7 days ago. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The First Alert SM310 is a smoke-only alarm with dual sensors and a sealed 10 year battery, aimed at catching both fast flaming fires and slow smoldering ones in a single low-maintenance unit.
Dual sensing is the distinguishing feature here versus a single-sensor smoke alarm: pairing detection types is meant to close the gap that a single sensor type can miss, whether that is a quick flaring fire or a slow smolder. It does not add carbon monoxide detection, so households that need CO coverage need a separate or combination unit for that.
- Dual sensor smoke detection
- Sealed 10 year battery
- Precision Detection sensing
- End-of-life warning
Who it's for
Suits a homeowner who wants broader fire-type coverage from one alarm without battery maintenance for a decade. Not the choice for anyone who also needs carbon monoxide detection from the same unit.
Strengths and trade-offs
Drawn from this product's published specifications.
- Dual sensors cover flaming and smoldering fires
- Sealed 10 year battery, no replacements
- End-of-life warning built in
- Precision Detection reduces cooking nuisance alarms
- Smoke detection only, no carbon monoxide sensing
- Lowest review count in this lineup, less track record
Performance notes
The dual sensor design is intended to respond to both fast, flaming fires and slower, smoldering ones, an area where single-sensor alarms can be biased toward one type. Precision Detection sensing also works to reduce nuisance alarms from ordinary cooking smoke. The sealed 10 year battery removes replacement cycles, and an end-of-life warning marks when the whole alarm is due for swap-out.
Specifications
| Brand | First Alert |
|---|
Other First Alert smoke detectors & fire alarms
How it compares
This product against the closest alternatives we track in smoke detectors & fire alarms.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| First Alert 10-Year Battery Smoke AlarmThis product | 4.5 / 5 | 133 | 2.7 / 5 |
| X-Sense Smoke Detector Carbon Monoxide Detector ComboX-Sense | 4.5 / 5 | 4,200 | 4.5 / 5 |
| Kidde Compact Smoke DetectorKidde | 4.5 / 5 | 940 | 4.3 / 5 |
| Kidde 21007584 I4618 Firex Hardwire Ionization Smoke Detector with Battery BackupwhiteKidde | 4.3 / 5 | 398 | 4.2 / 5 |
| Kidde Smoke DetectorKidde | 4.0 / 5 | 1,400 | 4.2 / 5 |
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Questions about the First Alert smoke detectors & fire alarms
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the First Alert SM310 detect carbon monoxide?
No, it is a dual-sensor smoke alarm only and does not include CO detection.
What does dual sensor mean on the SM310?
It uses two sensor types together to respond to both fast flaming fires and slow smoldering fires, rather than favoring one type.
Does the SM310 need battery replacements?
No, it has a sealed 10 year battery, so there is no battery to swap for the rated life of the alarm.