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The 10 Best Combination Gas & Carbon Monoxide Detectors to Buy – April 2021 edition

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Discover now our comparison of the best Combination Gas & Carbon Monoxide Detectors. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best Combination Gas & Carbon Monoxide Detectors are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the Combination Gas & Carbon Monoxide Detectors in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.

SaleNo. 1
Kidde AC Plug-In Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor Technology | Model # KN-COEG-3
  • Protects you and your family from 2 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
  • Test/reset button - Tests unit’s electronic circuitry operation and allows you to immediately silence the alarm
  • Two alarms in one detects carbon monoxide and explosive gas
  • Three convenient mounting options
  • Digital display and peak level button displays the peak CO level recorded by the alarm since it was last reset
  • Battery backup 9 volt battery included
  • Kidde’s carbon monoxide alarms meet the requirements of Underwriters Laboratories (UL), an independent facility that tests products for compliance with widely-accepted safety standards
SaleNo. 2
FIRST ALERT Powered Alarm SCO5CN Combination Smoke and Carbon Monoxide Detector, Battery Operated, 1 Pack, White
  • Keep your family safe with this battery operated smoke and carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure
  • Features an electrochemical carbon monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering 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 upon detection
  • Battery operated unit installs quickly and easily without an electrician. Low battery signal mute, quiets low battery signal for up to 8 hours
  • Simple to use, with a single test/silence button; EZ access battery drawer allows you to change battery without removing alarm from ceiling
  • 7 year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety; All first alert alarms are rigorously tested to meet UL standards
  • It can ship within the US except New York
  • First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)
No. 3
FIRST ALERT Combination Explosive Gas and Carbon Monoxide Alarm with Backlit Digital Display, GCO1CN
  • 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
  • Loud 85-decibel alarm can be heard easily
  • Plug-in combination carbon monoxide and explosive gas alarm with battery back-up
  • 3-way protection against natural, methane, and propane gases and carbon monoxide
  • Uses electrochemical carbon monoxide sensor--the most accurate technology available
  • Test button and low battery warning
  • Includes 9-volt battery
No. 4
Kidde 21026043 Battery-Operated (Not Hardwired) Combination Smoke/Carbon Monoxide Alarm with Voice Warning KN-COSM-BA
  • 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, 2 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 the technical specification for manual.
  • Voice Announcements - Hush Feature temporarily silences nuisance alarms with “Hush Mode Activated” and “Hush Mode Cancelled” voice announcement. If the alarm had detected a CO level of 100 ppm or higher, the unit will announce “Carbon Monoxide Previously Detected” to warn of the CO incident, when the Test/ Reset button is pressed. Temperature range: 40˚F (4.4˚C) to 100˚F (37.8˚C). Voltage (volts): 4.5
No. 5
2 Pack Combination Smoke and Carbon Monoxide Detector Battery Operated, Portable Smoke and Co Alarm for Home Bedroom Travel
  • Combo Smoke Detector/Carbon Monoxide Alarm Detects Battery-operated Unit installs Quickly and Easily Without an Electrician, loud 85dB Decibel alarm
  • Smoke and Co Detector You Can Hear the low Power alarm When the Power is Going to Run out, and Won’t Miss the Chance to Change the New Battery.
  • Photoelectric Sensor Detects Smoke While Minimizing false alarms, Electrochemical CO Sensor Alerts you to Carbon Monoxide Danger
  • Mini Combination of Carbon Monoxide Detector and Smoke alarm Simple style Designed for Kitchen and Travel
  • We Provide a 12-Month Worry-Free Refund Guarantee and a 5-Year Warranty. If You Have Any Questions or Concerns, Please Do Not Hesitate to Contact Us at Any Time, and We Will Reply to You within 24 Hours.
No. 6
2 in 1 Carbon Monoxide/Combination Alarm Gas Leak Detector for Home Kitchen Methane,LPG, LNG,CO with Voice Alarm
  • 【2 in 1 explosive & carbon monoxide Alarm】This BH-H3 Sniffer can detect explosive gas & carbon monoxide. Protect yourself and your family from two deadly threats. suitable for almost all applications with combustible gases, mists and residues. Such as natural gas, LPG(Propane and Methane), gas fuel, coal gas, artificial gas, liquefied natural gas, liquefied petroleum gas, etc.
  • 【Sounder & Flashing Alarm】When the concentration of Carbon Monoxide reaches 100PPM, Alarm for CO is 2 sounds a second alarm together with a Lighting Red light. When the concentration of Combustible gas reaches 5%, Alarm for explosive gas is 1 sound a second with a Flashing Light
  • 【Easy-to-Install and Durable】 The Plug in line length is 90cm. Connect to power 110V, Plug-In design makes it super easy and convenient to install. The indicator light will light up and voice start sound. The propane detector will Warming Up for 3 minutes then the device can start working.
  • 【Widely Applyed 】This product can be used as independent family alarm equipment, and also can be used as front detector of alarm system. Widely Used for Restaurant, Hospital,Hotel, Oil Factory,Garage, Gas Station etc.
  • 【100% SATISFIED SERVICE】This alarm has passed the professional gas detection test in our factory. If the CO gas detector has any quality problems, welcome to contact us and we will deal with it for you.
SaleNo. 7
FIRST ALERT BRK SC9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 1 pack
  • Keep your family safe with this hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure
  • Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor for smoke detection.
  • 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 upon detection
  • Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when 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 make installation easy
  • Rigorously tested to meet UL standards
  • Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety
  • First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)
No. 8
X-Sense 10-Year Battery (Not Hardwired) Combination Smoke & Carbon Monoxide Alarm Detector with LCD Display, Compliant with UL 217 & UL 2034 Standards, SC07
  • 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
  • LARGE LCD DISPLAY: Clearly displays battery level and the real-time CO levels in PPM (parts per million) taken from the surrounding air, with an updated measurement taken every 10 seconds
SaleNo. 9
Kidde Intelligent Detector Alarm Battery Operated Combination Smoke & Carbon Monoxide Detector Alarm | Model KN-COSM-XTR-BA
  • Voice Alarm - Announces the hazard type detected thereby helping to speed up the correct reaction to the hazard detected. Alarm announces “Fire Fire” when a smoke or fire hazard is detected and announces “Warning Carbon Monoxide” when a CO hazard is detected. The Hush feature temporarily silences nuisance alarms.
  • Combined Carbon Monoxide and Smoke Alarm - A single unit can be installed where previously, 2 were needed. Reduces installation time and helps to keep home décor attractive. Test/Reset Button-Tests alarm circuitry and triggers the voice announcement.
  • LEDs - Flashing green for normal operation and flashing red for alarm condition
  • Low Battery Warning - The unit warns of a low battery condition by announcing “low battery” and by initiating an alarm chirp and activating a flashing red LED.
  • Provides protection even during power outages when many fire and carbon monoxide incidents occur. The battery door will not close unless the batteries are properly installed.Voltage:1.3 volts
SaleNo. 10
Kidde 21007624 AC Photoelectric Smoke and Carbon Monoxide Detector Alarm | Hardwired with Battery Backup | Model # KN-COPE-IC
  • Provides protection from fire and carbon monoxide in one unit with Photoelectric sensor.
  • Fire Warning - The red LED will flash and be accompanied by three long alarm beeps followed by a verbal warning message “FIRE! FIRE!”. The alarm will repeat pattern until unit is reset or smoke is eliminated.
  • Carbon Monoxide Warning - Four short alarm beeps followed by a verbal warning “WARNING! CARBON MONOXIDE!” This continues until the unit is reset or the CO is eliminated.
  • Low Battery Warning - One chirp followed by warning “LOW BATTERY”. The red LED light will flash. This pattern will continue every minute for the first hour. After the first hour the red LED light will flash once every minute accompanied by the chirp sound. The “LOW BATTERY” warning will only sound once every fifteen minutes. Voice Hush Indication: “HUSH ACTIVATED” and “HUSH CANCELLED” voice announcement
  • Alarm Memory - The green LED will blink once every 16 seconds to alert a user when the unit has alarmed for smoke or has detected a concentration of CO. If the alarm has detected a CO level of 100ppm or greater, when the Test/Reset button is pressed the unit will announce “CO PREVIOUSLY DETECTED”. If the alarm has detected abnormal levels of smoke since its last test, it will produce three rapid beeps.
  • AC-Wire with battery backup, An included 9V battery protects during short-term power outages
  • Front-loading battery with unique battery door design
  • Voice Warning with Green and Red LEDs
  • Photoelectric smoke sensor – May detect visible fire particles associated with slow smoldering fires sooner than an ionization sensor.
  • Tamper resistant
  • AC-Wire with battery backup, An included 9V battery protects during short-term power outages
  • Front-loading battery with unique battery door design
  • Voice warning with green and red LEDs
  • Photoelectric smoke sensor – May detect visible fire particles associated with slow smoldering fires sooner than an ionization sensor.
  • Tamper resistant

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Last update on 2021-04-10 at 19:38 / Affiliate links / Images from Amazon Product Advertising API