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10 Best first alert dual sensors of 2025

Explore up to 40% 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 BRK 3120B-3 Hardwired Smoke Detector with Photoelectric and Ionization with Battery Backup, 3-Pack
    First Alert

    FIRST ALERT BRK 3120B-3 Hardwired Smoke Detector with Photoelectric and Ionization with Battery Backup, 3-Pack

    9.6
    Exceptional
    More info

  • 3

    FIRST ALERT Dual Sensor Smoke and Fire Alarm, SA3210 , White
    First Alert

    FIRST ALERT Dual Sensor Smoke and Fire Alarm, SA3210 , White

    23% Off
    9.4
    Excellent

  • 4

    First Alert SM310, 10-Year Sealed Battery Dual Sensor Smoke Alarm, 1-Pack
    FIRST ALERT

    First Alert SM310, 10-Year Sealed Battery Dual Sensor Smoke Alarm, 1-Pack

    15% Off
    9.3
    Excellent

  • 5

    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

    9.1
    Excellent
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  • 6

    First Alert CO615 Dual-Power Plug-In Carbon Monoxide Detector with Battery Backup and Digital Display, White
    FIRST ALERT

    First Alert CO615 Dual-Power Plug-In Carbon Monoxide Detector with Battery Backup and Digital Display, White

    40% Off
    8.8
    Very Good
    Our Rating
    More info

  • 7

    First Alert Battery Powered Z-Wave Smoke Detector & Carbon Monoxide Alarm, Works with Ring Alarm Base Station, 2nd Generation
    FIRST ALERT

    First Alert Battery Powered Z-Wave Smoke Detector & Carbon Monoxide Alarm, Works with Ring Alarm Base Station, 2nd Generation

    14% Off
    8.5
    Good
    Our Rating
    More info

  • 8

    First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White
    FIRST ALERT

    First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White

    40% Off
    8.4
    Good
    Our Rating
    More info

  • 9

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

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

    35% Off
    8.2
    Good

  • 10

    First Alert SCO7CN Combination Smoke and Carbon Monoxide Detector with Voice and Location, Battery Operated , White
    FIRST ALERT

    First Alert SCO7CN Combination Smoke and Carbon Monoxide Detector with Voice and Location, Battery Operated , White

    19% Off
    8.1
    Good
    Our Rating
    More info