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10 Best first alert dual sensors of 2025

Save up to 38% off
  • Best Choice

    1

    First Alert Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup, SM300-AC, 6-Pack
    First Alert

    First Alert Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup, SM300-AC, 6-Pack

    9.8
    Exceptional
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  • Value for Money

    2

    First Alert Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup, SM300-AC, 3-Pack
    First Alert

    First Alert Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup, SM300-AC, 3-Pack

    9.7
    Exceptional

  • 3

    First Alert Smoke Alarm, 10-Year Sealed Battery Dual Sensor Detector with Test & Silence Button, SM310, 1-Pack
    First Alert

    First Alert Smoke Alarm, 10-Year Sealed Battery Dual Sensor Detector with Test & Silence Button, SM310, 1-Pack

    9.4
    Excellent

  • 4

    First Alert SM300-AC, Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup, 1-Pack
    First Alert

    First Alert SM300-AC, Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup, 1-Pack

    11% Off
    9.3
    Excellent

  • 5

    First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,White
    First Alert

    First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,White

    9.2
    Excellent
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  • 6

    First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack
    First Alert

    First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack

    10% Off
    8.9
    Very Good

  • 7

    First Alert Smoke Alarm, Interconnect Hardwire Detector with Battery Backup, SMI100-AC, 3-Pack
    First Alert

    First Alert Smoke Alarm, Interconnect Hardwire Detector with Battery Backup, SMI100-AC, 3-Pack

    38% Off
    8.7
    Very Good

  • 8

    First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack
    First Alert

    First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack

    8.5
    Good

  • 9

    First Alert Combination Smoke & Carbon Monoxide Alarm, Battery-Operated Detector with Slim Profile Design, SMCO200, 1-Pack
    First Alert

    First Alert Combination Smoke & Carbon Monoxide Alarm, Battery-Operated Detector with Slim Profile Design, SMCO200, 1-Pack

    11% Off
    • batteries:Alkaline
    • power source:Battery Powered
    • alarm:Smoke and CO Alarm
    • style:Slim Profile with Audible Alert
    • sensor:Ionization
    8.4
    Good

  • 10

    New 2025 First Alert SMCO410 Z-Wave Battery-Powered Smoke Detector & Carbon Monoxide Alarm, Works with Ring Alarm Base Station, Single Pack, White
    First Alert

    New 2025 First Alert SMCO410 Z-Wave Battery-Powered Smoke Detector & Carbon Monoxide Alarm, Works with Ring Alarm Base Station, Single Pack, White

    8.3
    Good