First Alert SM310 10-Year Dual Sensor Smoke Alarm
- Dual sensor, photoelectric and ionization
- 10-year battery in the title
- Battery powered, smoke alarm only
- 5 by 5 by 2 inches (D x W x H)
- 8.64 ounces, white
- Precision Detection style
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A battery smoke alarm that pairs photoelectric and ionization sensing, with a battery promised to last a decade by the title. It senses smoke only, with no carbon monoxide.
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ASIN: B0CLVV1R8ZModel: SM310Category: Smoke Detectors & Fire Alarms
Overview
First Alert builds this white battery smoke alarm around two sensors, photoelectric and ionization, in one compact housing. The title calls it a ten year battery model, and the listing states smoke as the alarm type.
Its strength is two sensing types in one unit with no wiring required. The limitation is that the listing says nothing about interconnect, voice alerts or testing steps, and it covers smoke only.
Who it's for
Bedrooms, hallways and rentals where a sealed battery alarm is easy to mount are the natural spots. Homeowners who need linked alarms or gas detection should look at a different type of unit.
Pros and cons
- Photoelectric and ionization sensors
- Battery powered, no wiring
- Ten year battery in the title
- Smoke only, no carbon monoxide
- Interconnect not listed
Performance notes
Photoelectric sensing reacts to slow smoldering smoke while ionization reacts to fast flaming fires, so pairing both widens the range of fires detected. Battery life is a stated feature, but real life depends on regular testing.
Specifications
| Brand | First Alert |
|---|---|
| Model | SM310 |
| Dimensions & fit | |
| Item Dimensions D X W X H | 5 x 5 x 2 inches |
| Item weight | 8.64 ounces |
| Power & efficiency | |
| Power Source | Battery powered |
| Construction & materials | |
| Color | White |
| Other details | |
| Sensor Type | Photoelectric, ionization |
| Alarm | Smoke |
| Product Style | Precision Detection |
| Item Highlight | SM310 |
Closest rivals on specs
Kidde 10SDR Compact Smoke Detector- Item Weight 0.54 vs 0.39 pounds (+38%)
Frequently asked questions
How often does the First Alert SM310 battery need replacing?
The title calls it a 10-Year Battery alarm. The listing gives no testing or replacement steps, so follow the printed instructions and test it regularly.
Does the SM310 detect carbon monoxide?
No. The alarm type is smoke, using photoelectric and ionization sensors.
Is the SM310 hardwired?
No. The power source is battery powered.