10 BEST COMBINATION GAS & CARBON MONOXIDE DETECTORS for sale in 2025 – compare between the best combination gas & carbon monoxide detectors on sale.

Rank Product Rating
1
Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor Technology | Model # KN-COEG-3
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1,094 Reviews
Product Highlights
  • Protects you and your family from two deadly threats: Carbon monoxide and explosive gas.
  • Sounder alarm – The KN-COEG-3 offers a loud 85-decibel pulsing alarm that will sound to alert you to a potential problem.
  • Digital display - Displays the level of carbon monoxide the unit is sensing.
  • Peak level memory - Recalls the highest CO concentration detected

$42.99
2
First Alert Combination Explosive Gas and Carbon Monoxide Alarm with Backlit Digital Display, GCO1CN
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273 Reviews
Product Highlights
  • Versatile CO alarm senses high levels of propane, natural/methane gas, and carbon monoxide
  • Crisp backlit digital display allows you to view current and peak levels
  • Can be remotely muted using almost any household remote control
  • Plugs into any AC outlet for easy setup; backup battery powers unit in case of power outage

$53.00
3
Kidde KN-COEG-3 Plug-in Combination Explosive Gas/Carbon Monoxide Alarm Detector with Battery Back-Up
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Product Highlights
  • Alarm is easily installed in any of your AC wall outlets, giving you the choice of a direct-plug, a 6 power cord or a table top unit
  • 6 ft. power cord included for table top option
  • UL listed and offers a 7-year life and a 5-year limited warranty
  • Loud 85 dBA pulsing alarm that will sound to alert you to a potential problem

$50.00
4
Kidde KN-COEG-3 Nighthawk Plug-in Carbon Monoxide and Explosive Gas Alarm with 2 9v Polaroid Extreme Alkaline Battery Backups
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Product Highlights
  • Propane and carbon monoxide detector with 9 volt batteries
  • Monoxide explosive nighthawk detector is imported, adds a great value, highly durable and very easy to use
  • Gas leak alarm is manufactured in China
  • Life saver carbon monoxide alarm with two alarms in one detects carbon monoxide and explosive gas

$45.95
5
Kidde 21026043 Battery-Operated(Not Hardwired) Combination Smoke/Carbon Monoxide Alarm with Voice Warning KN-COSM-BA
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2,368 Reviews
Product Highlights
  • Voice Alarm –Announces the hazard type detected thereby helping to speed up the correct reaction to the hazard detected. Alarm announces “Fire ” when a smoke or fire hazard is detected and announces “Warning Carbon Monoxide” when a CO hazard is detected
  • Combined Carbon Monoxide and Smoke Alarm – A single unit can be installed where previously, two were needed. Reduces installation time and helps to keep home décor attractive.
  • Audio alarm: 85 dB at 10 feet. Test/Reset Button and LEDs – Tests alarm circuitry and triggers the voice announcement. Flashing green for normal operation and flashing red for alarm condition. Humidity Range: 10 percent to 95 percent relative humidity non-condensing
  • Battery - Provides protection even during power outages when many fire and carbon monoxide incidents occur. The unit warns of a low battery condition by announcing “low battery” and by initiating an alarm chirp and activating a flashing red LED. The battery door will not close unless the batteries are properly installed. Note : The date printed on the item is manufacturing date, not the expiration date. Refer to the PDF attached below in Technical Specification for Manual.

$44.99 $29.17
6
X-Sense 10-Year Battery Combination Smoke & Carbon Monoxide Alarm Detector with LCD Display, Auto Check & Silence Button, SC07
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Product Highlights
  • 2-IN-1 PROTECTION: Equipped with both photoelectric and electrochemical CO sensors that work independently of each other; instantly notifies you when dangerous smoke or CO concentration is detected while minimizing false alarms; provides the ultimate protection from 2 deadly threats, all contained in 1 unit
  • BUILT-IN 10-YEAR BATTERY: Provides 10 years of continuous power with a built-in lithium battery, saving on energy while remaining eco-friendly; saves you from constantly having to change batteries or wonder if your alarm is still functioning
  • ACCURATE, RELIABLE & HIGHLY SENSITIVE: The X-Sense combination smoke and co alarm has been redesigned from the inside out; it will ensure that smoke triggers the alarm instead of interference by taking 3 separate smoke samples from the surrounding air; a full 360° ring of air intakes ensures complete detection with no blind spots
  • LED INDICATOR: Clearly informs you of the working status of the alarm with its 3-color flashing LED indicator (green LED indicates normal operation, red LED indicates the alarm status, and yellow LED indicates a fault), ensuring the safety and security of your home 24/7

$39.99
7
Combination Smoke and Carbon Monoxide Detector Alarm, GLBSUNION Beeps Warning Smoke and CO Alarms for Basements Travel Home Office Kitchen Bedroom Car, Battery Operated, Comply with UL 217/2034,2-Pack
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Product Highlights
  • Keep your family safe with this battery operated smoke and carbon monoxide alarm; battery powered alarms provide continuous monitoring of CO and smoke levels, even if there's a power failure(Operated by 2 x 1.5V AA Batteries (not included))
  • 2-in-1 Accurate, Reliable & Highly Sensitive Alarm: Equipped with both photoelectric smoke sensor and electrochemical CO sensor that work independently of each other; every second counts; detects both fast and slow-burning fires, and instantly notifies you when dangerous smoke or CO concentration is detected while minimizing false alarms; provides the ultimate protection from 2 deadly threats, all contained in 1 unit
  • Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85dB siren provides a clear, loud warning upon detection
  • Simple to Use: Test/Silence button enables you to test the alarm weekly, and to easily silence the alarm when false alarms occur; malfunction and low battery warnings allow you to easily know the working status of the alarm; in case of an emergency, an alarm tone of over 85 dB will sound throughout your entire home, instantly alerting the entire household, even those in sleep

$28.99
8
X-Sense 2-in-1 Smoke and Carbon Monoxide Detector Alarm, 10-Year Battery-Operated Dual Sensor Fire & CO Alarm with Auto-Check, SC06, Pack of 3
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Product Highlights
  • Combination Smoke and Carbon Monoxide Alarm: One alarm to protect against 2 deadly threats, including smoke and carbon monoxide; accurately detects carbon monoxide from any potential source
  • 10-Year Battery-Operated Smoke and CO Detector: A sealed lithium battery enables the unit to keep you and your family safe and sound for up to a decade with no need to replace batteries frequently; a low battery warning lets you know the unit is coming to its end of life
  • Faster Response to Dangers with Loud 85 dB Alarm: Upgraded photoelectric and electrochemical sensors significantly increase the sensitivity of the alarm for a faster response time while minimizing false alarms
  • Simple Installation & Operation: This battery-operated unit can be installed quickly and effortlessly without an electrician; one-button operation allows you to test and silence the alarm with ease

$99.99
9
Kidde Nighthawk Plug-In AC/DC Carbon Monoxide Alarm Detector with Digital Display KN-COPP-3
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2,977 Reviews
Product Highlights
  • Peak level button – Displays the peak CO level recorded by the alarm since it was last reset or unplugged
  • Test button functions – Tests the unit for proper operation and resets the carbon monoxide alarm
  • LED operation – Blinking dot in lower right corner of display denotes normal operation
  • Ten years after the initial power up, this alarm will “beep” two times every 30 seconds to indicate that it is time to replace the alarm.

$71.50 $28.03
10
3 Pack Combination Smoke and Carbon Monoxide Detector Battery Operated, Travel Portable Photoelectric Fire&Co Alarm for Home, Kitchen
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No ratings yet
Product Highlights
  • Combo smoke detector/carbon monoxide alarm detects two threats
  • Electrochemical CO sensor alerts you to carbon monoxide danger
  • Photoelectric sensor detects smoke while minimizing false alarms
  • Battery-operated unit installs quickly and easily without an electrician,A single button tests the unit or silences the alarm. Low battery signal mute, quiets low battery signal for up to 8 hours

$55.99

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