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Carbon Dioxide Detector Comparison - July 2025
| 1 Best Choice  9.8Exceptional | 2 Best Value  9.7Exceptional | 3  9.6Exceptional | 4 9.5Excellent | 5  9.4Excellent | 6  9.3Excellent |
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ModelKidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button | Model First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White | Model Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable | Model First Alert CO400 Carbon Monoxide (CO) Detector, Battery Operated Alarm, 1-Pack | Model Newentor CO2 Monitor, Indoor Air Quality Meters, Carbon Dioxide Detector with Voice Alert, Large Display CO2 Tester, Temperature Humidity Sensor, Alarm Clock for Home, RV, Grow Tents, Black | Model U UNNI CO2 Monitor Carbon Dioxide Detector for Home, 3 Adjustable Volume for Alerts & 3 Adjustable Backlight, Photoacoustic Sensor for Temperature Humidity & Indoor Air Quality Monitor |
BrandKidde | Brand First Alert | Brand Kidde | Brand First Alert | Brand Newentor | Brand U UNNI |
Reviews | Reviews | Reviews | Reviews  | Reviews | Reviews |
Features | |||||
Easy installation 9.8 | Easy installation 9.8 | Easy installation 9.8 | Easy installation 9.4 | Easy installation 8.9 | Easy installation 8.9 |
Simple to use 9.6 | Simple to use 9.6 | Simple to use 9.9 | Simple to use 9.1 | Simple to use 8.9 | Simple to use 8.4 |
Precision 9.6 | Precision 9.3 | Precision 9.4 | Precision 9.3 | Precision 8.4 | Precision 7.6 |
Clearly written 9.6 | Clearly written 9.6 | Clearly written 9.8 | Clearly written 9.4 | Clearly written 9.4 | Clearly written 8.9 |
Battery duration 9.4 | Battery duration 9.3 | Battery duration 9.1 | Battery duration 9.1 | Battery duration 8.9 | Battery duration 8.4 |
Tech Specs | |||||
product dimensions 2.75 x 1.5 x 4.5 inches | product dimensions 1.38D x 5W x 3.4H | product dimensions 1.5D x 4.5W x 2.75H | product dimensions 1D x 5W x 3H | product dimensions 4.72 x 0.74 x 3.54 inches 4.8 ounces | product dimensions - |
item weight 0.635 ounces | item weight 4.2 ounces | item weight 0.16 ounces | item weight 7.2 ounces | item weight - | item weight 5 ounces |
batteries included Yes | batteries included Yes | batteries included Yes | batteries included Yes | batteries included - | batteries included No |
included components two AA batteries, User manual | included components Alarm, Battery | included components Kidde Battery Operated Carbon Monoxide Alarm with Digital Display KN-Copp-B-LPM | included components Alarm Mounting Bracket User Manual 9V Battery | included components - | included components 1 CO2 Monitor, 1 USB Cable, Manual |
power source Plug In | power source Corded Electric | power source Battery Powered | power source Battery Powered | power source - | power source USB CHARGING OPTION & BATTERY BACKUP |
customer reviews4.7 4.7 out of 5 stars 32, 430 ratings 4.7 out of 5 stars | customer reviews 4.7 4.7 out of 5 stars 18, 035 ratings 4.7 out of 5 stars | customer reviews 4.7 out of 5 stars 17, 845 4.7 out of 5 stars | customer reviews 4.7 4.7 out of 5 stars 19, 319 ratings 4.7 out of 5 stars | customer reviews - | customer reviews 4.6 4.6 out of 5 stars 62 ratings 4.6 out of 5 stars |
batteries required Yes | batteries required Yes | batteries required Yes | batteries required Yes | batteries required - | batteries required No |
color White | color White | color Detector | color White | color - | color - |
batteries 2 AA batteries required. included | batteries 1 9V batteries required. included | batteries 3 AA batteries required. included | batteries 2 AA batteries required. included | batteries - | batteries - |
pattern Detector | pattern Alarm | pattern Detector | pattern Detector | pattern - | pattern - |
voltage 120 Volts | voltage 120 Volts | voltage 3 Volts | voltage 120 Volts | voltage - | voltage - |
item package quantity 1 | item package quantity 1 | item package quantity 1 | item package quantity 1 | item package quantity - | item package quantity - |
battery cell type Alkaline | battery cell type Alkaline | battery cell type Alkaline | battery cell type Alkaline | battery cell type - | battery cell type - |
style 1 Pack | style Plug in Alarm with Battery Backup | style - | style Battery Powered | style - | style - |
warranty description- | warranty description 7 Years Limited | warranty description 10 Year Limited | warranty description 5 Year Limited Warranty | warranty description - | warranty description - |
alarm- | alarm Carbon Monoxide | alarm Audible | alarm Audible | alarm - | alarm - |
size- | size 1-Pack | size KN-COPP-B-LPM | size Pack of 1 | size - | size - |
sensor type- | sensor type Electrochemical | sensor type Electrochemical | sensor type Electrochemical | sensor type - | sensor type - |
Review- | Review | Review | Review | Review - | Review - |
Available On   | Available On | Available On | Available On | Available On | Available On |
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you
9.7
2First Alert40% OffFirst Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White
9.8 Easy installation9.6 Simple to use9.6 clearly writtenWhy we love it
Easy plug-in with battery backup.
Accurate CO detection anywhere in room.
Simple test/silence button operation.
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9.6
3Kidde
Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
9.9 Simple to use9.8 Easy installation9.8 clearly writtenWhy we love it
Easy installation, no wiring needed.
Portable and versatile for home or travel.
Reliable with a 10-year warranty.
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Features
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Consumer Reviews
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Popularity
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Value for money
AI allows us to compare products based on attributes like price, specifications, and user feedback, helping to determine their value for money. This data-driven approach offers an efficient and reliable way to assess how products stack up against one another in terms of cost-effectiveness.
