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Updated: 08 Oct 2025

10 Best Carbon Monoxide Detectors

#1
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Carbon Monoxide Meter, Easy-to-use meter detects and measures concentration levels of carbon monoxide gas, Klein Tools ET110

Brand: KLEIN TOOLS
$279.00
⭐ 4.2
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    Easy-to-use meter detects and measures concentration levels of carbon monoxide gas
  • User protection with short-term exposure limit (STEL) alarm
  • Low level alarm (35 ppm) and high level alarm (200 ppm)
  • Audible and visual alarms, Backlit display with CO measurements (0 to 1000 ppm) and temperature (F/C )
  • Klein Tools, doesn't just make great products, we make great products that stand up to the demands of the professionals who use them everyday since 1896
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#2
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Carbon Monoxide Detectors Alarm, CO Alarms for Basements Kitchen Travel Home Office House Bedroom Living Room Car, Battery Operated. (2-Pack)

Brand: CLEZGO
$24.97
⭐ 4.1
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    Accurate ReliableAnd highly sensitive alarm equipmen Electrochemical CO sensor; Quick detection To danger Notify you immediately when CO concentration occurs
  • Energy Saving: Use this battery powered carbon monoxide alarm to ensure the safety of your family. The battery powered alarm can continuously monitor CO. (Operated by 3 x 1.5V AA Batteries (not included)
  • 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
  • Sleek Design: This mini Carbon Monoxide Detector has a diameter of only 3.94 in (100 mm), so it can be unobtrusively installed anywhere easily
  • Alarm Warning:When a Dangerous level of Carbon Monoxide is detected, the Red LED will flash and a loud alarm pattern will sound, Loud 85 decibel alarm with LED Flash While in the Alarm Mode for the Life-Saving Safety.
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#3
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Carbon Monoxide & Combination Gas Detector, 4 in 1 Plug in CO, Natural Gas, Propane, Temp and Humidity Gas Alarm; Design for Home, Kitchen & Camping Use; Easy to Install & Removal

Brand: VITITE
$75.31
⭐ 4.7
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    4-in-1 Combination Gas Detector: The YC302 Pro+ uses high-precision sensors to monitor CO, natural gas, propane, temperature, humidity, and other explosive gases. Its ideal for homes, kitchens, apartments, hotels, and RVs, keeping your family safe from gas leaks
  • Plug and Play: No setup or expertise requiredjust plug it in and it's ready to use
  • User-Friendly Design: The screen dims when no gas is detected to reduce light disturbance. If CO or explosive gases are detected, the screen brightens and an audible alarm sounds, making it easy to spot a gas leak. Double-press the 'TEST' button to turn off or light up the screen
  • Sound & Screen Alerts: The detector gives early warnings with an 85dB alarm and an LCD screen (CO alarm: 150PPM, Gas alarm: 5%LEL). You can test its performance and wake up the screen with the test button
  • Friendly Customer Service: We offer a three-year warranty and free returns. From purchase, you also get lifetime technical support. If you have questions, our engineers will help within 24 hours
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#4
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First Alert CO250B Carbon Monoxide Alarm with 9-Volt Battery

Brand: First Alert
$44.54
⭐ 4.8
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    Nuisance alarm Silence button
  • Tamper resistant locking pin
  • Lighted power indicator
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#5
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First Alert CO410 Battery Operated Carbon Monoxide Detector Alarm with Digital Display and Peak Memory

Brand: First Alert
$64.42
⭐ 4.8
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    Battery-powered Carbon Monoxide Detector
  • Easy Access Battery Door
  • Includes 2 Aa Batteries
  • Digital Display
  • Battery-powered Carbon Monoxide Detector
  • Easy Access Battery Door
  • Includes 2 Aa Batteries
  • Digital Display
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#6
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Carbon Monoxide Alarm with LCD Display,CO Detector with Test/Reset Button,Battery(Battery included) Powered Carbon Monoxide Detector.

Brand: DSWERUOF
$19.99
⭐ 4.7
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    Safe and Reliable This carbon monoxide detector is equipped with a high sensitivity electrochemical sensor, which can accurately and quickly monitor the concentration of carbon monoxide and emit an 85dB alarm to warn people to take quick measures to deal with the danger and protect the safety of your family.
  • LCD DisplayLCD display can clearly show the carbon monoxide concentration in real time, once the concentration reaches the alarm value, it will sound an alarm; green and red LED lights indicate the normal operation and alarm status respectively.
  • Battery PoweredPowered by 2 AA batteries (batteries supplied), low battery will sound an alarm for battery replacement.
  • Simple InstallationEasy to install on any wall or ceiling with the included screws, or stick on the wall with adhesive tape(No double sided tape included).
  • Test/Reset ButtonThe Test/Reset button is used to verify that the batteries and alarm are working properly.
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#7
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Quell Q10YK-CO Long Life Photoelectric Smoke Alarm & Carbon Monoxide Detector for Kitchen, White

Brand: Quell
$78.10
⭐ 4.7
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    The intelligent multi-sensor alarm detects both smoke and carbon monoxide.
  • Photoelectric sensor - Advanced sensor to detect visible particles associated with smouldering fires
  • Single screw-mounting bracket - Enables quick and easy installation. Alarm is automatically activated once installed
  • Sealed-In lithium battery - Maintenance and hassle free with prevention from tampering and removal. The alarm is always on, with no battery replacement required for the 10 year life-span of the alarm
  • Deactivation switch - Disables the alarm to allow for safe battery disposal once the unit has reached the end of its 10-year life
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#8
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Handheld CO Detector, 80db Light CO Leak Detector, High Precision, Portable, CO Gas Analyzer with LCD Display, Handheld Carbon Monoxide Meter, 0-1000 ppm, (not Battery Included)

Brand: Lunarlipes
$44.00
⭐ 4.1
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    CO Meter Handheld The Carbon Monoxide Detectors monitor the CO concentration in the airhigh precision sensing . Carbon monoxide tester with automatic calibration function. The CO detector portable has high-definition LCD backlight screen makes it easy to read even at night. NOTE: Battery Not Included.
  • Measurement Range The Handheld Carbon Monoxide Meter measurable CO concentration range is 0~1000PPM (accuracy 1PPM), and the concentration alarm value can be set freely (preset value: 24PPM); when the CO gas concentration reaches the co detector alarm level, the sound and light alarm will work. Two temperature units ( / ) (temperature range: 0~50/32~122).
  • Easy to Use The Handheld CO Detector is small in size (5.31 in * 1.97 in * 1.38 in) , light in weight (3.14oz/0.17 lb). Easy to carry and operate. The high-definition LCD backlight screen makes carbon monoxide reader easy to use even at night.
  • Simple Operation The CO Meter Handheld can be set to eble automatic shutdown (when the automatic shutdown function is ebled, if there is no operation within 10 minutes, it will automatically shut down to save power). In addition this handheld carbon monoxide detectors has 4 modes, which can be easily switched according to the air environment.
  • Widely Used The Portable Carbon Monoxide Detector has the characteristics of wide measurement range, high measurement accuracy, small size, convenient carrying, and operation. It is widely used in Indoor and outdoor for example : home , coal, oil rig, textile, chemical, metallurgy, paper making, fire fighting, municipal and other industries..After Sale Guarantee We provide One-Year After-Sales Guarantee for the CO detector portable.
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#9
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B-Qtech Carbon Monoxide Detector Alarm with Digital Display and Replaceable Battery Operation, CO Detector Alarm with Test Button and LED Status Indicator

Brand: B-Qtech
$39.99
⭐ 4.1
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    The carbon monoxide (CO) detector is equipped with a high-precision electrochemical CO sensor, which can quickly detect CO gas leakage and can be used in kitchens, bedrooms, toilets and other places.
  • The LCD digital display shows the battery status and the concentration of carbon monoxide in the air (ppm) in real time.If the concentration exceeds the concentration, there will be a voice prompt.
  • The carbon monoxide alarm detector has a self-checking function, which automatically detects hardware failures such as internal circuits and carbon monoxide sensors in normal standby state, and comes with a low battery warning to remind users to replace the battery to ensure full protection and always work properly
  • Powered by 3 x 1.5V AAA batteries (batteries not included), low power consumption, good operation, long service life and simple installation, can be easily installed on the wall or ceiling in minutes
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#10
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Carbon Monoxide Detector,Replaceable Battery Operated CO Alarm Detector with test button and digital display suitable for home, office,Comply with EN50291(AA Batteries NOT Included)

Brand: Zituso
$19.99
⭐ 5
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    Safe & Reliable: This NEW advanced Carbon Monoxide Detector,Equipped with LED display screen and a highly sensitive electrochemical sensor , easy to read numerical values (ppm),accurately continuous monitoring of Carbon Monoxide levels and quickly,You could clearly understand the concentration of PPM and take corresponding measures when danger occurs to keep your family safe,To ensure complete protection make sure to place one on each level of your home and in each bedroom.
  • Digital LCD Display: The screen displays a wide range of real-time CO levels from 000 to 999PPM. When the CO reading is above 30 ppm, the blue backlight turns on and displays real-time levels, The alarm time depends on the carbon monoxide level.Through the LCD display of the gas detector, you can read and monitor the CO concentration at any time and avoid the occurrence of danger.
  • Alarm standard: The alarm time depends on the carbon monoxide concentration level: 50ppm, alarm within 60 to 90 minutes; 100ppm, alarm within 10 to 40 minutes; 300ppm, alarm within 3 minutes.When the concentration exceeds a certain level,the red LED flashes and a loud alarm mode occurs - 85 dB loud alarm with flashing LED.You can quickly and clearly understand the concentration of PPM and take corresponding measures.
  • How to Use: Diameter 9.5* Height 3(CM) Carbon Nonoxide Alarm, 2*1.5V AAA battery powered carbon monoxide detector (Batteries not included), low current consumption, long standby time. Carbon monoxide detectors are easy to install and require no rewiring. Simple to use with just a test/reset button, briefly press once to enter working mode. If you need to test whether the product is effective, you can simply press the button to test.
  • Package Contents: 1 X mini carbon monoxide detectors in one package, 2 X expansion screws, 2 X anchor plugs,1 X user manual.Buy with confidence: All our carbon monoxide alarms are rigorously tested and comply with CE EN50291 standards. If you have any questions about carbon monoxide detector, please feel free to contact us, We promise and guarantee customer service to provide you with a reply within 24 hours.
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