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10 Best first alert dual sensors of 2026

Save up to 23% off
  • Best Choice

    1

    First Alert Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup, SM300-AC, 6-Pack
    First Alert
    9.8
    Exceptional

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

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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
    9.7
    Exceptional

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

  • 3

    First Alert Smoke Alarm, 10-Year Sealed Battery Dual Sensor Detector with Test & Silence Button, SM310, 1-Pack
    First Alert
    9.4
    Excellent

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

  • 4

    First Alert SM300-AC, Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup, 1-Pack
    First Alert
    9.3
    Excellent

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

  • 5

    First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack
    First Alert
    9.0
    Excellent

    First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack

    23% Off
    • color:‎White
    • pattern:‎SMICO100-AC
    • batteries included:‎Yes
    • item model number:‎SMICO100-AC
    • best sellers rank:#305 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #1 in Smoke & Carbon Monoxide Alarms
  • See Today’s Deals & Prices

  • 6

    BRK First Alert SMI100, Battery-Operated Smoke Alarm, 3-Pack
    First Alert
    8.8
    Very Good

    BRK First Alert SMI100, Battery-Operated Smoke Alarm, 3-Pack

    • product dimensions:‎5.6 x 5.6 x 1.9 inches
    • color:‎White
    • batteries:‎1 9V batteries required. (included)
    • item weight:‎9.6 ounces
    • pattern:‎SMI100

  • 7

    First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup and Voice & Location Alerts, SMCO100V-AC, 1-Pack
    First Alert
    8.7
    Very Good

    First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup and Voice & Location Alerts, SMCO100V-AC, 1-Pack

    • product dimensions: 5.1D x 5.1W x 2.4H
    • color: White
    • batteries:N/A
    • item weight: 11.2 ounces
    • pattern:N/A

  • 8

    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
    8.6
    Very Good

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

  • 9

    First Alert Combination Smoke & Carbon Monoxide Alarm, Battery-Operated Detector with Slim Profile Design, SMCO200, 1-Pack
    First Alert
    8.5
    Good

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

    • color: White
    • pattern: 2nd Generation
    • batteries included: Yes
    • item model number: SMCO200
    • best sellers rank: 24,068 in Tools & Home Improvement See Top 100 in Tools & Home Improvement 49 in Smoke & Carbon Monoxide Alarms

  • 10

    First Alert BRK Carbon Monoxide Detector, Hardwired Alarm with Battery Backup, CO5120BN, White
    First Alert
    8.3
    Good

    First Alert BRK Carbon Monoxide Detector, Hardwired Alarm with Battery Backup, CO5120BN, White

    • color: White
    • pattern: Detector
    • batteries included: No
    • item model number: CO5120BN
    • number of items: 1

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