Best CO Detectors Updated April 2026
Advertiser disclosure About our rankings

Join the millions that have trusted BuyersGuide.org to help them make smarter buying decisions. Let our independent expert reviews and data-driven shopping recommendations help you find the one that's right for you.

Best CO Detectors
2026 Buyer's GuideUpdated April 2026
Advertiser disclosure About our rankings
Sort by:
Best CO Detector
1

9.4

4IN1 Gas & Carbon Monoxide Detector Combination Plug in, CO Gas Monitor with Real-Time Temperature & Humidity Display, Alarm fo...
Detects: Carbon monoxide & combustible gases
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Plug-in
10% Coupon
Compare
100+ bought in past month
Best CO Detector

9.4

1
4IN1 Gas & Carbon Monoxide Detector Combination Plug in, CO Gas Monitor with Real-Time Temperature & Humidity Display, Alarm fo...
Detects: Carbon monoxide & combustible gases
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Plug-in
100+ bought in past month
10% Coupon
Compare
2

9.2

Kidde Carbon Monoxide Detector, Plug-In with 9V Battery Backup, Digital Display, 85 dB Alarm, LED Status Light Indicators, 3rd ...
Detects: Carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Plug-in with battery backup
-15%
Compare

9.2

2
Kidde Carbon Monoxide Detector, Plug-In with 9V Battery Backup, Digital Display, 85 dB Alarm, LED Status Light Indicators, 3rd ...
Detects: Carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Plug-in with battery backup
-15%
Compare
Best Value
3

9.0

VETOUCH Plug-in Carbon Monoxide Detector with Digital Color Display CO Detector for CO, Temperature & Humidity, 85dB Loud Alert...
Detects: Carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Plug-in
-33%
Compare
Best Value

9.0

3
VETOUCH Plug-in Carbon Monoxide Detector with Digital Color Display CO Detector for CO, Temperature & Humidity, 85dB Loud Alert...
Detects: Carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Plug-in
-33%
Compare
4

8.9

TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Scre...
Detects: Carbon monoxide
Alarm: Audible & visual
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
Read Full Review
Compare

8.9

4
TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Scre...
Detects: Carbon monoxide
Alarm: Audible & visual
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
Compare
Read Full Review
5

8.8

MOES Carbon Monoxide Detector Plug in, Backup Battery Digital CO Detector with Real-Time Display for CO Level, Temp & Humidity,...
Detects: Carbon monoxide
Alarm: 85 dB, LED strobe light
Interconnects: No
Wi-Fi Enabled: No
Power Source: Plug-in with battery backup
-29% + 10% Coupon
Compare

8.8

5
MOES Carbon Monoxide Detector Plug in, Backup Battery Digital CO Detector with Real-Time Display for CO Level, Temp & Humidity,...
Detects: Carbon monoxide
Alarm: 85 dB, LED strobe light
Interconnects: No
Wi-Fi Enabled: No
Power Source: Plug-in with battery backup
-29% + 10% Coupon
Compare
6

8.6

PT199 Natural Gas Leak Detector with Audible & Visual Alarm, Portable Gas Sniffer to Locate Combustible Sources Like Methane, P...
Detects: Natural gas & propane
Alarm: 75 dB & visual
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
Read Full Review
5% Coupon
Compare

8.6

6
PT199 Natural Gas Leak Detector with Audible & Visual Alarm, Portable Gas Sniffer to Locate Combustible Sources Like Methane, P...
Detects: Natural gas & propane
Alarm: 75 dB & visual
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
5% Coupon
Compare
Read Full Review
7

8.5

Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
Detects: Carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
-7%
Compare

8.5

7
Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
Detects: Carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
-7%
Compare
8

8.4

SwitchBot CO2 Detector, Air Quality Monitor Indoor, CO2 Monitor for CO2/TEMP/Humidity, Portable Carbon Dioxide Detector for Hom...
Detects: Carbon dioxide
Alarm: Not indicated
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
-14%
Compare

8.4

8
SwitchBot CO2 Detector, Air Quality Monitor Indoor, CO2 Monitor for CO2/TEMP/Humidity, Portable Carbon Dioxide Detector for Hom...
Detects: Carbon dioxide
Alarm: Not indicated
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
-14%
Compare
9

8.3

X-Sense Wireless Interconnected Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display and Peak Va...
Detects: Carbon monoxide
Alarm: 85 dB
Interconnects: Yes
Wi-Fi Enabled: No
Power Source: Battery
-23%
Compare

8.3

9
X-Sense Wireless Interconnected Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display and Peak Va...
Detects: Carbon monoxide
Alarm: 85 dB
Interconnects: Yes
Wi-Fi Enabled: No
Power Source: Battery
-23%
Compare
10

8.1

First Alert CO400 Carbon Monoxide (CO) Detector, Battery Operated Alarm, 1-Pack
Detects: Carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
Compare

8.1

10
First Alert CO400 Carbon Monoxide (CO) Detector, Battery Operated Alarm, 1-Pack
Detects: Carbon monoxide
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Battery
Compare
We also considered 9 others:

Our Top Choice

Best CO Detector
1

9.4

4IN1 Gas & Carbon Monoxide Detector Combination Plug in, CO Gas Monitor with Real-Time Temperature & Humidity Display, Alarm fo...
Detects: Carbon monoxide & combustible gases
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Plug-in
10% Coupon
Compare
100+ bought in past month
Best CO Detector

9.4

1
4IN1 Gas & Carbon Monoxide Detector Combination Plug in, CO Gas Monitor with Real-Time Temperature & Humidity Display, Alarm fo...
Detects: Carbon monoxide & combustible gases
Alarm: 85 dB
Interconnects: No
Wi-Fi Enabled: No
Power Source: Plug-in
100+ bought in past month
10% Coupon
Compare

Compare Features

Interconnects
1. MOES Gas & Carbon Monoxide Detector
MOES Preview MOES Preview
MOES
at Amazon
2. Kidde Nighthawk Carbon Monoxide Detector
KIDDE Preview KIDDE Preview
KIDDE
at Amazon
Best Value
3. VETOUCH Carbon Monoxide Detector
VETOUCH Preview VETOUCH Preview
VETOUCH
at Amazon
4. TOPTES CT-300 Portable CO Detector
TOPTES Preview TOPTES Preview
TOPTES
at Amazon
5. MOES Carbon Monoxide Detector
MOES Preview MOES Preview
MOES
at Amazon
6. TOPTES PT199 Natural Gas Leak Detector
TOPTES Preview TOPTES Preview
TOPTES
at Amazon
7. Kidde 21008873 Monoxide Alarm
KIDDE Preview KIDDE Preview
KIDDE
at Amazon
8. SwitchBot CO2 Detector
SWITCHBOT Preview SWITCHBOT Preview
SWITCHBOT
at Amazon
9. X-Sense Wireless Interconnected Carbon Monoxide Detector
X-SENSE Preview X-SENSE Preview
X-SENSE
at Amazon
10. First Alert CO400 Carbon Monoxide Detector
FIRST ALERT Preview FIRST ALERT Preview
FIRST ALERT
at Amazon
Deal
10% Coupon -15% -33% — -29% + 10% Coupon 5% Coupon -7% -14% -23% —
Deal 10% Coupon -15% -33% — -29% + 10% Coupon 5% Coupon -7% -14% -23% —
Detects
Carbon monoxide & combustible gases Carbon monoxide Carbon monoxide Carbon monoxide Carbon monoxide Natural gas & propane Carbon monoxide Carbon dioxide Carbon monoxide Carbon monoxide
Detects 		Carbon monoxide & combustible gases Carbon monoxide Carbon monoxide Carbon monoxide Carbon monoxide Natural gas & propane Carbon monoxide Carbon dioxide Carbon monoxide Carbon monoxide
Alarm
85 dB 85 dB 85 dB Audible & visual 85 dB, LED strobe light 75 dB & visual 85 dB Not indicated 85 dB 85 dB
Alarm 		85 dB 85 dB 85 dB Audible & visual 85 dB, LED strobe light 75 dB & visual 85 dB Not indicated 85 dB 85 dB
Interconnects
No No No No No No No No Yes No
Interconnects 		No No No No No No No No Yes No
Wi-Fi Enabled
No No No No No No No No No No
Wi-Fi Enabled 		No No No No No No No No No No
Power Source
Plug-in Plug-in with battery backup Plug-in Battery Plug-in with battery backup Battery Battery Battery Battery Battery
Power Source 		Plug-in Plug-in with battery backup Plug-in Battery Plug-in with battery backup Battery Battery Battery Battery Battery

Related Categories
Carbon Monoxide DetectorCO DetectorCarbon Monoxide Gas DetectorCarbon Monoxide AlarmLow Level CO MonitorGas Detector
How We Rank
Expert Analysis
Our team of experts highlights useful information so you can easily compare products to find the one that's right for you.

Award-Winning Tech
Our technology analyzes thousands of purchase trends to bring you the top product recommendations.

Why Trust Our Reviews?
5,100+ shoppers have used Buyer's Guide in the last week to help find the best CO Detectors.

Learn more about our rankings.

Reliable, Safe & Secure
Helping millions of users make smarter purchases online.
Related Categories
Carbon Monoxide DetectorCO DetectorCarbon Monoxide Gas DetectorCarbon Monoxide AlarmLow Level CO MonitorGas Detector
Related Categories
Carbon Monoxide DetectorCO DetectorCarbon Monoxide Gas DetectorCarbon Monoxide AlarmLow Level CO MonitorGas Detector