Best Carbon Monoxide Sensors

Kidde Smoke & Carbon Monoxide Detector Battery Powered Combination Smoke & CO Alarm Voice Alert

  • Ionization sensor technology - smoke detector senses invisible fire particles, loud 85 decibel alarm alerts of fire or smoke.
  • Reliable detection during a power failure - carbon monoxide detector and smoke alarm combo operates on 2-AA batteries.
  • Easy installation & front-load battery door makes it simple to replace the batteries without disconnecting the alarm.
  • Smoke & CO detector in 1 unit - with alert modes, LED lights and voice alarm that announces "Fire! Fire!", "Warning! Carbon Monoxide!" or "Low Battery!".
  • Tamper-resistant design - deters removal of the carbon monoxide smoke detector combo from the ceiling.
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Carbon Monoxide Alarm Detector Smoke Detectors，Replaceable Battery-Operated CO Alarm Detector with Digital Display【Packaging Non-Battery】

  • Smoke detectors using high accurate electrochemical sensor, alerts you to carbon monoxide danger and insure the safety of your life. Photoelectric....
  • It can serve as both smoke detector and carbon monoxide detector to detect the threat from these two harmful chemicals. One single unit instead of two....
  • When the fire smoke alarm detects a smoke fire or detected concentration of carbon monoxide exceeds the standard value, the LCD display will show the....
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First Alert CO710 Carbon Monoxide Detector with 10-Year Battery and Digital Temperature Display White

  • Keep your family safe with this easy to use digital-display, 10-year battery operated carbon monoxide alarm.
  • Battery powered alarms provide continuous....
  • Easy-to-read backlit digital display shows temperature and CO concentration.
  • Peak Level feature displays the highest concentration of carbon monoxide....
  • Built-in 10-year lithium battery offers continuous protection for the life of the carbon monoxide detector.
  • A loud 85-decibel alarm sounds when CO levels reach dangerous levels.
  • Equipped with end-of-life signal chirp, so you know when it’s time to replace the unit for safety.
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FIRST ALERT Carbon Monoxide Detector, No Outlet Required, Battery Operated, 2-Pack, CO400

  • Keep your family safe with this 2-pack of easy to use, battery operated carbon monoxide alarms.
  • Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure.
  • Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.
  • A loud 85-decibel alarm sounds when CO levels reach dangerous levels.
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom.
  • Equipped with end-of-life signal chirp, so you know when it’s time to replace the unit for safety.
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First Alert SA511CN2-3ST Wireless Interconnected Smoke Alarm with Voice Location, Battery Operated, 2 Pack , WHITE

  • Smoke detector carbon monoxide detector combo – sounds loud 85 decibel alarm with voice alerts that announce "Fire! Fire!" or "Warning! Carbon Monoxide!".
  • Hardwired with backup battery - combo smoke and carbon monoxide detector is hardwired into a 120V power source with 9V battery backup.
  • Easy installation – battery door is on the front for quick replacement.
  • Photoelectric smoke detector senses visible fire particles and electrochemical CO detector provides accurate readings.
  • Will interconnect with up to 24 other devices including smoke, CO and heat alarms.
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Kidde Hardwired Smoke & Carbon Monoxide Detector, Battery Backup, Interconnectable, LED Warning Light Indicators, 4 Pack

  • 2-in-1 Detection - Smoke & carbon monoxide detector combo alerts you to both smoke & fire events as well as poisonous, CO gas in a single device.
  • 24/7 Self-testing components are always checking the device to ensure it's operating as expected (not a substitute for a manual push test).
  • Easy installation mounting bracket included for quick installation in 4 orientations.
  • Photoelectric sensor detects visible fire particles associated with slow, smoldering fires, while the electrochemical sensor detects carbon monoxide.
  • LED warning indicators alert you to various status: green = normal operation, amber = operating error, and red = smoke, fire or carbon monoxide event.
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3 Pack Smoke and Carbon Monoxide Detector Powered by Battery with Digital Display, Dual Alarm Sensor of Smoke and CO,Easy to Install

  • Smoke and Carbon Monoxide Detector Offering Excellent Security: Making a Loud Alarm (85 dB) When It Detects a Buildup of Smoke or Carbon Monoxide, and Instantly Alert Those In Danger..
  • Built-in Electrochemical Sensor with High Accuracy and Infrared Photoelectric Sensor Helping to Reduce False Alarms..
  • Carbon Monoxide Detector and Smoke Alarm Providing Whole-day Protection.
  • Battery-powered Unit Can be Installed Quickly and Easily without an Electrician.
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FIRST ALERT BRK SC7010BV Hardwired Talking Photoelectric Smoke and Carbon Monoxide CO Detector White

  • Keep your family safe with this talking hardwired smoke and carbon monoxide alarm.
  • It's equipped with voice and location, so you are alerted of the....
  • Tells you whether the danger is smoke or carbon monoxide and where the threat is among up to 11 preprogrammed locations in your home.
  • Features electrochemical Carbon Monoxide sensing technology and photoelectric smoke sensor optimized to detect larger smoke particles produced by....
  • Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected.
  • Equipped with end of life signal chirp, so you know when it's time to replace the unit for your safety.
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GX-2009, 4 gas, LEL / O2 / H2S / CO with alligator clip, no charger by RKI Instruments

  • Four-gas detector for surveying levels of H2S, oxygen (O2), carbon monoxide (CO), and combustibles in natural and industrial environments, and in other personal safety, training, research, and ambient air monitoring applications.
  • Electrochemical cell sensor monitors ambient H2S, oxygen, and carbon monoxide levels, and catalytic bead sensor monitors ambient combustible gasses continuously.
  • Audio, visual, and vibration alarms alert simultaneously when ambient H2S, oxygen, carbon monoxide, and combustible gases reach preset low, high, TWA, or STEL levels.
  • LCD screen shows up to four ambient gas concentrations, battery level, alarm condition, and the status of calibration, bump, and sensor self-tests.
  • Rechargeable Nickel–metal hydride battery reduces the need to replace batteries and much longer charge cycles..
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First Alert BRK SC9120B-12 Hardwired Smoke and Carbon Monoxide CO Detector with Battery Backup 12-Pack

  • Keep your family safe with this 12 pack of hardwired smoke and carbon monoxide alarms.
  • the battery backup means constant monitoring, even if there's a....
  • Features an electrochemical Carbon Monoxide sensing technology as well as an ionization sensor that detects the fine particles of a fast burning fire.
  • Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning....
  • Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when a threat is detected.
  • Simple to use, with a single test/silence button, and side load battery compartment.
  • tamper resistant locking brackets and universal mounting brackets....
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