First Alert SM310 10-Year Dual Sensor Smoke Alarm
- Power Source: Battery
- Sensor Type: Photoelectric, Ionization
- Alarm: Smoke
- Product Style: Precision Detection
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A dependable dual-sensor smoke alarm for households prioritizing broad fire detection over CO coverage in one unit.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B0CLVV1R8ZModel: SM310Category: Smoke Detectors & Fire Alarms
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.
Pros and cons
- 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 |
|---|---|
| Model | SM310 |
| Dimensions & fit | |
| Item Weight | 0.54 pounds |
| Item Dimensions D X W X H | 5 × 5 × 2 inches |
| Power & efficiency | |
| Power Source | Battery |
| Construction & materials | |
| Color | White |
| Other details | |
| Sensor Type | Photoelectric, Ionization |
| Alarm | Smoke |
| Product Style | Precision Detection |
| Number Of Items | 1 |
| Mfr Part Number | SM310 |
| Item Type Name | Smoke Alarm |
| Item Highlight | SM310 |
Closest rivals on specs
Universal Security Instruments MI106S Hardwired Smoke Alarm- Item Weight 0.54 vs 0.49 pounds (+10%)
Frequently asked questions
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.