The Best Carbon Monoxide Alarms 2025

1. First Alert CO910V - Carbon monoxide sensor - white

First Alert CO910V - carbon monoxide sensor - white

Key Features and Benefits: Exclusive talking alarm tells you type and location of danger Electrochemical sensor Slim design Power LED and alarm indicator Mute/silence button End-of-life signal Versatile mount Peak-level memory

2. Kidde Battery Operated Carbon Monoxide Alarm with Digital Display KN-COPP-B-LPM

Keep your home safe by continuously monitoring for dangerous CO levels with the Kidde Battery-Operated Carbon Monoxide Alarm with Digital Display, KN-COPP-B-LPM. It has been carefully designed and tested to detect CO concentration levels as low as 11 and up to 999 PPM (parts per million). This Kidde Carbon Monoxide alarm features a digital memory display that allows for easy viewing and storing of the levels in your home. It also includes a slide-out battery door that gives immediate access to the batteries and a safety feature that makes it difficult to close the cover without them being installed. The test/reset button lets you test the unit’s electronic horn or reset it during an alarm. This battery-operated carbon dioxide alarm will continue to detect even during power outages. It is suitable for all living areas.

Kidde Battery-Operated Carbon Monoxide Alarm with Digital Display, KN-COPP-B-LPM: Continuously monitors your home for dangerous CO levels Detect CO concentration levels as low as 11 and up to 999 PPM Features a digital memory display for viewing and storing Kidde Carbon Monoxide alarm has a slide-out battery door with a safety feature Test/reset button lets you test and reset the unit Kidde Battery-Operated Carbon Monoxide Alarm with Digital Display is suitable for all living areas 10-year life and limited warranty Kidde Battery Operated Carbon Monoxide Alarm With Digital Display Kn-Copp-B-Lpm Kidde Battery-Operated Carbon Monoxide Alarm with Digital Display, KN-COPP-B-LPM: Continuously monitors your home for dangerous CO levels Detect CO concentration levels as low as 11 and up to 999 PPM Features a digital memory display for viewing and storing Kidde Carbon Monoxide alarm has a slide-out battery door with a safety feature Test/reset button lets you test and reset the unit Kidde Battery-Operated Carbon Monoxide Alarm with Digital Display is suitable for all living areas

3. Kidde 900-0076-01 AC Powered, Plug-In Carbon Monoxide Alarm

The Kidde KN-COPP-3 AC powered, plug-in carbon monoxide alarm utilizes sophisticated electronic components and unmatched sensor technology to protect you and your family from the dangers of CO. The KN-COPP-3 includes a 9V battery backup that provides continuous monitoring of CO levels, even during power outages, when AC-only units are not providing protection. The KN-COPP-3 will detect and store measured data of concentrated CO levels as low as 11 and up to 999 PPM with its peak level memory display. This alarm gives you several mounting options, including: direct-plug, a 6’ power cord or table top.

Digital Display – Shows the level of carbon monoxide the unit is sensing. The unit updates this reading every 15 seconds. Peak Level Button – Displays the peak CO level recorded by the alarm since it was last reset or unplugged. 9V Battery Backup – Provides protection during power outage. Test Button – Tests the unit for proper operation and resets the alarm LED Operation – Blinking dot in lower right corner of display denotes normal operation

4. PRO-LAB Carbon Monoxide Test Kit CA101

Carbon monoxide test kit that is more sensitive than electronic detectors, detecting as little as 50 ppm (parts per million) of the invisible and odorless gas, before it becomes dangerous to you and your family. The kit contains a badge and 2 yellow chemical sensor buttons that turn grey when in contact with carbon monoxide gas. The instant detectors are reusable and, once opened, each button will last up to 3 months (90 days). Blister pack. No. CA101: Lab Results: Instant Results, Pkg Qty: 1, Package Type: Card

More sensitive than electronic detectors Detects as little as 50 ppm of carbon monoxide gas Contains a badge and 2 yellow chemical sensor buttons Reusable, each button lasts up to 3 months

5. American Red Cross by Eton Blackout Buddy Carbon Monoxide Alarm with Emergency LED Flashlight, ARCBBCO30W-SNG

Carbon Monoxide (CO) gas is odorless, colorless, and toxic. This is why you need a reliable CO gas detector to keep you safe in your home and office. The American Red Cross by Eton Blackout Buddy CO is ETL certified to UL 2034 CO standards. If dangerous conditions are detected, the Blackout Buddy CO will blast an audible and LED flashing alarm. - even during a power outage - because it runs on both AC power and replaceable AA batteries! Also, when the power goes out, the Blackout Buddy CO automatically turns on its emergency light so you can use it as an emergency flashlight.

Carbon monoxide alarm detects gas from common sources such as gas- or wood-burning fireplaces, leaking gas-fired appliances, gas-fired boilers and heaters – as well as portable, clogged chimney, running automobiles, and other CO-emitting equipment Audible and flashing light indicator lets you know there's a problem Plug it in and forget it - continuous power as it plugs into wall outlet plus has battery backup power; foldable plug Large real-time LED screen shows your current CO levels in PPM LED flashlight built in so it is always ready for action

6. (3 pack) Kidde AA Battery Operated Basic Carbon Monoxide Alarm. 3 Pack.

Save 4% by buying in a 3 pack! Wow!

2 AA battery backup Low Battery Hush Event memory Loud 85 decibel alarm Low battery signal

7. Universal Security Instruments CD-9000 9 Volt Carbon Monoxide Alarm

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Universal Security Instruments CD-9000 9 Volt Carbon Monoxide Alarm

8. BulbAmerica Battery Operated Carbon Monoxide Detector with LCD

BulbAmerica Battery Operated Carbon Monoxide Detector with LCD. This CO Detector gives early warming of dangerous Carbon Monoxide with the most accurate CO sensor technology available. 2 Year Warranty BulbAmerica Battery Operated Carbon Monoxide Detector with LCD. This CO Detector gives early warming of dangerous Carbon Monoxide with the most accurate CO sensor technology available. Electrochemical Sensor Audible Alarm (85 dB) Visual Alarm (Red LED) LED Display (CO Concentration) Memory Function (Peak Level) LED Control Lights Test Reset Button Battery Powered Low Battery Warning

BulbAmerica Battery Operated Carbon Monoxide Detector with LCD. This CO Detector gives early warming of dangerous Carbon Monoxide with the most accurate CO sensor technology available. 2 Year Warranty BulbAmerica Battery Operated Carbon Monoxide Detector with LCD. This CO Detector gives early warming of dangerous Carbon Monoxide with the most accurate CO sensor technology available. Electrochemical Sensor Audible Alarm (85 dB) Visual Alarm (Red LED) LED Display (CO Concentration) Memory Function (Peak Level) LED Control Lights Test Reset Button Battery Powered Low Battery Warning

9. P3 P4250 Kill A Watt(r) Co2 Wireless

Now, you can monitor your power consumption remotely. Simply plug in the wireless sensor along with the item(s) you wish to check and it will transmit data to the central LCD, where you can see your cumulative electrical expenses and your carbon footprint.

P3 Kill A Watt CO2 Wireless: Includes P4255 Kill A Watt CO2 accessory sensor and P4225 display Allows user to calculate the carbon footprint of appliances Monitors power consumption remotely within a 300' wireless range Calculates carbon emissions and costs by the day, week, month and year Can be used with up to 8 sensors Displays 8 critical units of measurement

10. Home Safety And Alarm Kit

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Home Safety And Alarm Kit