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Best firehawk carbon monoxide alarms - April 2026

Last Updated - April 3, 2026

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

First Alert

First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm - 3 Pack

First Alert

$122.12

More Details
Main highlights
- Test/silence button for efficient testing to ensure alarm is working properly
- Provides reliable 2-in-1 protection against both smoke and carbon monoxide
- First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
- End-of-life warning lets you know when it’s time to replace the alarm
- Battery-operated alarm allows for easy installation and maintenance
$122.12
2
14% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

First Alert
14% Off

First Alert SC5 Battery Smart Smoke & Carbon Monoxide Alarm, SMCO600NV, 1-Pack

First Alert

$111.40

$129.99
(14% Off)

More Details
Main highlights
- Voice alerts with Heads-Up warning tells you the type and location of danger in your home
- Sends alerts to your phone if smoke and CO are detected through the First Alert app
- Notifies when the batteries are low, eliminating late night chirps
- Interconnect so when one alarm sounds, all compatible alarms in the home sound
- Equipped with Precision Detection Technology to help reduce nuisance alarms and provide an early warning
- Compatible with Google's Nest Protect Alarm
$111.40
$129.99 (14% Off)
3
14% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Kidde
14% Off

Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display

Kidde

$39.68

$45.97
(14% Off)

More Details
Main highlights
- Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested
- Easy Installation - simply plug-in to a standard, 120V outlet in your home
- Digital LED display shows the level of carbon monoxide the CO alarm is sensing
- 9-volt battery backup provides protection during a power outage
- 85-decibel alarm announces when carbon monoxide is detected
$39.68
$45.97 (14% Off)
4
Best Value
33% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Guudoo
33% Off

6 in 1 Carbon Monoxide Detectors, Plug-in Gas and Smoke Alarm with Magnetic Base and Backup Battery, Portable Gas Leak Detector Featuring Large LCD Display and Audible/Visual Alarms for Home, RV(Gray)

Guudoo

$39.99

$59.99
(33% Off)

More Details
Main highlights
- Plug and Play & Smart Sensor Design: No extra tools needed – simply plug the carbon monoxide and gas alarm detector into outlet and it starts protecting your family. Eqipped with advanced electrochemical and photoelectric sensors ensure rapid, precise detection of CO, combustible gases, and smoke. Audible and visual alerts activate immediately when a threat is detected, keeping you informed and your home safe.
- One-Button Self-Test & Reliable Long-Term Protection: Verify your natural gas and CO detector in seconds with a simple press. Advanced electrochemical and photoelectric sensors ensure accurate detection, activating the loud alarm and LED indicators for clear confirmation. The durable aluminum alloy housing and magnetic base provide flexible placement and relaiable protection for families, travelers, and property managers seeking an all-in-one safety solution. (Warm Tips: For optimal performance, use the self-test button weekly. )
- Dual Power Modes & Magnetic Adapter: Use anytime anywhere. You can plug this reliable carbon monoxide into standard outlet for continuous protection, or detach it and connect the included magnetic adapter for fully cordless operation. The instant-activation rechargeable battery ensures uninterrupted monitoring whether at home or on the go—ideal for homes, RVs, kitchens, hotels and even cruise cabins.
- 6-in-1 Carbon Monoxide Detector: Multi-functional safety monitor that senses carbon monoxide (CO), combustible gases (like natural gas, propane), smoke, temperature changes, and humidity levels. Built-in rechargeable battery and magnetic base, this gas carbon monoxide detectors provide continuous, portable safety monitoring—even during power outages.
- 100dB Loud Alarm & Large LCD Display: This gas detector for home eatures a ≥85dB powerful alarm and clear LED indicators for instant alerts. 2.8inch large, bright LCD screen shows real-time readings for CO, combustible gas, smoke, temperature, and humidity, allowing you to monitor environmental conditions at a glance and respond quickly to emergency.
$39.99
$59.99 (33% Off)
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Kidde

Kidde Carbon Monoxide Detector, Propane, Natural, Methane, & Explosive Gas Alarm, Plug-in Wall with 9-Volt Battery Backup, Digital LED Display

Kidde

$98.23

More Details
Main highlights
- Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested
- Easy Installation - simply plug-in to a standard, 120V outlet in your home
- Digital LED display shows the level of carbon monoxide the CO alarm is sensing or states "GAS" when explosive gas is present
- 9-volt battery backup provides protection during a power outage
- 85-decibel alarm announces when carbon monoxide or explosive gas is detected
$98.23

Best firehawk carbon monoxide alarms - April 2026

First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm - 3 Pack

First Alert SC5 Battery Smart Smoke & Carbon Monoxide Alarm, SMCO600NV, 1-Pack

Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display

6 in 1 Carbon Monoxide Detectors, Plug-in Gas and Smoke Alarm with Magnetic Base and Backup Battery, Portable Gas Leak Detector Featuring Large LCD Display and Audible/Visual Alarms for Home, RV(Gray)

Kidde Carbon Monoxide Detector, Propane, Natural, Methane, & Explosive Gas Alarm, Plug-in Wall with 9-Volt Battery Backup, Digital LED Display

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