10 Best combo gas and carbon monoxide detectors of 2025

Save up to 33% off

Best Choice

1

KOABBIT

2 Packs Combination Gas & Carbon Monoxide Detector, 4-in-1 Natural Gas Detector & Carbon Monoxide Alarm with Temperature(°F) & Humidity,Propane & CO Detector for Home,RV,Apartment
9.8

Exceptional

Our Rating
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Value for Money

2

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

Easy Installation with Battery Backup
Simply plug into a 120V outlet; 9V battery ensures operation during power outages.

Ideal for Gas and CO Monitoring
Perfect for homes with natural gas, propane, or potential CO leaks.

Highly Rated Audible Alarm
Customers praise the loud 85-decibel alarm for effective alerting.
9.5

Excellent

Our Rating

9.7
Noise level

9.5
Easy installation

9.5
clearly written
3

Kidde
Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable

33% Off
Main highlights

Battery Powered Convenience
Operates on 2-AA batteries, includes Test-Hush button for easy testing and silencing.

Ideal for Multi-Level Homes
Perfect for bedrooms and living areas, especially with wood-burning stoves.

Highly Rated Alarm Performance
Praised for its loud, effective alarm and reliable detection.
9.3

Excellent

Our Rating

9.9
Easy installation

9.7
worth the money

9.7
Simple to use
4

FANSTLOYI

5 in 1,Carbon Monoxide Detectors Plug in,Combined Gas, Smoke, CO Alarms, Detects Temperature and Humidity,with HD Display,Plug in or Portable with Built-in Battery,for Travel, RV
9.1

Excellent

Our Rating
5

Hembisen

Combination Natural Gas Detector & Carbon Monoxide Detector, 4-in-1 Carbon Monoxide Alarm,Fahrenheit(°F) & Humidity,Propane,Methane,Gas Detector Alarm & CO Detector for Home,RV,Apartment
8.9

Very Good

Our Rating
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6

FIRST ALERT
FIRST ALERT Combination Explosive Gas and Carbon Monoxide Alarm with Backlit Digital Display, GCO1CN
Main highlights

Versatile Detection
Detects propane, methane, and carbon monoxide with high accuracy.

Ideal for Home Safety
Perfect for homes and motorhomes, ensuring comprehensive gas safety.

Reliable Performance
Highly praised for low false alarm rate and effective sensing.
8.7

Very Good

Our Rating

9.7
safety

8.7
Easy installation

8.2
Simple to use
7

OLUNCLE

3 Packs Smoke and Carbon Monoxide Detector Powered by Battery,Portable Smoke Detector Carbon Monoxide Detector Combo with Large LCD Display, Fire Alarm Smoke Detector for Home,Kitchen
8.6

Very Good

Our Rating

9.7
Noise level

9.5
Easy installation

9.5
Battery Duration
8

Gedsffati
Gedsffati 5IN1 Plug in Carbon Monoxide Detector &Smoke & Combustible Natural Gas Alarm Combination Builti-in Backup Battery HD Screen [Smoke CO Gas Temp Humidity Sensor] for Home Indoor RV (White)
Main highlights

5-in-1 Detector Features
Combines CO, smoke, and various gas detection plus temp/humidity sensors.

Versatile Usage Scenarios
Ideal for homes, RVs, hotels; fits standard US outlets.

User-Friendly HD Screen
Real-time data display praised for clarity and ease of use.
8.4

Good

Our Rating
9

X-Sense

X-Sense Smart Smoke Detector Carbon Monoxide Detector Combo with No Fee App Notification, Replaceable Battery Powered Smoke Detector and Carbon Monoxide Detector, SC06-WX, 1-Pack

25% Off
8.1

Good

Our Rating
10

TJTFJS

4 Packs, 2 in 1, Smoke and Carbon Monoxide Detector, Smoke Detector Carbon Monoxide Detector Combo,85db Alarm, Digital Display, with Battery, Easy to Install
8.0

Good

Our Rating

10 Best combo gas and carbon monoxide detectors of 2025

1

2 Packs Combination Gas & Carbon Monoxide Detector, 4-in-1 Natural Gas Detector & Carbon Monoxide Alarm with Temperature(°F) & Humidity,Propane & CO Detector for Home,RV,Apartment

2

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

9.7

9.5

9.5

3

Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable

9.9

9.7

9.7

4

5 in 1,Carbon Monoxide Detectors Plug in,Combined Gas, Smoke, CO Alarms, Detects Temperature and Humidity,with HD Display,Plug in or Portable with Built-in Battery,for Travel, RV

5

Combination Natural Gas Detector & Carbon Monoxide Detector, 4-in-1 Carbon Monoxide Alarm,Fahrenheit(°F) & Humidity,Propane,Methane,Gas Detector Alarm & CO Detector for Home,RV,Apartment

6

FIRST ALERT Combination Explosive Gas and Carbon Monoxide Alarm with Backlit Digital Display, GCO1CN

9.7

8.7

8.2

7

3 Packs Smoke and Carbon Monoxide Detector Powered by Battery,Portable Smoke Detector Carbon Monoxide Detector Combo with Large LCD Display, Fire Alarm Smoke Detector for Home,Kitchen

9.7

9.5

9.5

8

Gedsffati 5IN1 Plug in Carbon Monoxide Detector &Smoke & Combustible Natural Gas Alarm Combination Builti-in Backup Battery HD Screen [Smoke CO Gas Temp Humidity Sensor] for Home Indoor RV (White)

9

X-Sense Smart Smoke Detector Carbon Monoxide Detector Combo with No Fee App Notification, Replaceable Battery Powered Smoke Detector and Carbon Monoxide Detector, SC06-WX, 1-Pack

10

4 Packs, 2 in 1, Smoke and Carbon Monoxide Detector, Smoke Detector Carbon Monoxide Detector Combo,85db Alarm, Digital Display, with Battery, Easy to Install

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