Best Co2 Monitor In January 2025

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In this article, we will present the top 10 Best Co2 Monitor available on the market, along with our expert reviews. Get one of them and have fun! You’ll love it!

To help you in your search, we have completed this list of the Best Co2 Monitor.

Top Rated Best Co2 Monitor Of 2025

Rank	Product Name	Score
1	Kidde Carbon Monoxide Alarm Detector | Digital Display | Battery Operated | Model Buy Now	9.7 Buy Now
2	Kidde Carbon Monoxide Detector Alarm |Battery Operated | Model # KN-COB-LP2 9CO5-LP2 Buy Now	9.5 Buy Now
3	First Alert CO400 Carbon Monoxide Detector, White, Pack of 1 Buy Now	9.1 Buy Now
4	Kidde 00760 - 120 volt Digital Display Plug-In Carbon Monoxide Alarm with Battery Buy Now	8.8 Buy Now
5	Kidde 25759 - 120 volt Plug-In Carbon Monoxide Alarm with Battery Backup Buy Now	8.6 Buy Now
6	SensorPush Wireless Thermometer/Hygrometer for iPhone/Android - Humidity & Temperature Smart Sensor with Alerts Buy Now	8.3 Buy Now
7	First Alert CO605 Plug-In Battery Backup CO Alarm, 1 pack, White Buy Now	8.1 Buy Now
8	Aranet4 Home: Wireless Indoor Air Quality Monitor for Home, Office or School [CO2 Buy Now	7.8 Buy Now

1. Kidde Carbon Monoxide Alarm Detector | Digital Display | Battery Operated | Model

• Test/reset button - tests units electronic circuitry & horn and resets the unit during alarm. tests co alarm circuit operation and allows you to immediately silence the alarm
• Battery operated - provides best protection during power outages. battery safeguard makes it difficult to close the cover without batteries in the unit. low battery signal alerts user when the batteries need to be replaced. slide-out battery door cover gives immediate access to batteries
• Provides peace of mind against the silent killer and a digital display
• Led's - green led for normal operation, red led for alarm. temperature range 40f (4.4c) to 100f (37.8c).sensor: electrochemical
• Digital display - displays the level of carbon monoxide the unit is sensing. shows co level in ppm (parts per million). updates digital reading every 15 seconds allowing you to see if levels change. peak level memory displays the highest co concentration measured since the last reset

2. Kidde Carbon Monoxide Detector Alarm |Battery Operated | Model # KN-COB-LP2 9CO5-LP2

• Loud 85 decibel alarm
• Low battery signal
• 2 aa battery backup
• Low battery hush
• Event memory

3. First Alert CO400 Carbon Monoxide Detector, White, Pack of 1

• 5 year limited warranty, equipped with end of life signal chirp, so you know when its time to replace the unit for safety
• To ensure complete protection make sure to place one on each level of your home and in each bedroom
• A loud 85 decibel alarm sounds when co levels reach dangerous levels
• All first alert co alarms are rigorously tested to meet ul standards
• Keep your family safe with this easy to use, battery operated carbon monoxide alarm, battery powered alarms provide continuous monitoring of co levels, even if there's a power failure
• Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room

4. Kidde 00760 - 120 volt Digital Display Plug-In Carbon Monoxide Alarm with Battery

• Note: this co alarm is not battery operated. however, these alarms are equipped with 9 volt battery backup the 9 volt battery is to supply short term back-up during a power outage.
• Ten years after the initial power up, this alarm will beep two times every 30 seconds to indicate that it is time to replace the alarm.
• Peak level button displays the peak co level recorded by the alarm since it was last reset or unplugged
• Power source: 120vac. temperature range-40f (4.4c) to 100f (37.8c). humidity range-5%-95% relative humidity (rh)
• Test button functions tests the unit for proper operation and resets the carbon monoxide alarm
• Led operation blinking dot in lower right corner of display denotes normal operation

5. Kidde 25759 - 120 volt Plug-In Carbon Monoxide Alarm with Battery Backup

• Provides peace of mind against the silent killer, temperature range: 40f (4.4c) to 100f (37.8c)
• Tamper resist feature can be activated to cause unit to go into alarm if it has been unplugged or has come loose from the outlet
• Test/reset button : tests co alarm circuit operation and allows you to immediately silence the alarm
• Two leds : red - illuminates when in alarm mode. green ac power is present, normal operation
• End of life alarm : alerts user to replace co alarm after 10-years of operation

6. SensorPush Wireless Thermometer/Hygrometer for iPhone/Android - Humidity & Temperature Smart Sensor

• Powerful: line of sight range of 325 feet keeps you up to date, even on the other side of your home
• Accurate: swiss-made sensing component provides reliable, accurate measurements
• Set it and forget it: pushes readings to devices via bluetooth and alerts you if there's a problem
• Flexible: add a sensorpush g1 wifi gateway (sold separately) for data and alerts via the internet
• Easy one-time setup with our beautifully designed, free app (ios or android)

7. First Alert CO605 Plug-In Battery Backup CO Alarm, 1 pack, White

• Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room
• Keep your family safe with this easy to use plug in carbon monoxide alarm, it works with any standard outlet and also has a battery backup for continuous monitoring of carbon monoxide levels, even if there's a power failure
• All first alert co alarms are rigorously tested to meet ul standards. item length is 3.4 inches , item width is 1.38 inches and item height is 5 inches
• Simple to use, with a single test/silence button, a loud 85 decibel alarm sounds when carbon monoxide levels reach dangerous levels. low battery signal mute, quiets low battery signal for upto 8 hours
• To ensure complete protection make sure to place one on each level of your home and in each bedroom
• 7 year limited warranty, equipped with end of life signal chirp, so you know when its time to replace the unit for safety

8. Aranet4 Home: Wireless Indoor Air Quality Monitor for Home, Office or School [CO2

• Power-efficient e-ink display ensures super long battery life for this wireless device (up to 2 years)
• Uses non-dispersive infra-red sensor (ndir) technology for most precise co2 measurements
• Smartphone app for historical data viewing (supports iphone and ipad with ios 12 or later, android devices with nougat 7.0 or later, compatible with bluetooth 4.1 or later)
• Visual and sound warnings when co2 concentration gets too high
• Precisely monitors indoor air quality - co2, temperature, relative humidity and atmospheric pressure in real-time