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The best carbon dioxide detectors in comparison

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TopTes CT-300 Portable Carbon Monoxide Detector, CO Detector with Audible & Visual Alarm, 0-5000PPM, CO Alarm, Backlit LCD Screen, for Home, Car, Camping& Travel (Includes Battery x3) - Orange

TOPTES

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Carbon Monoxide Detector TopTes CT-300 is an ideal portable CO tester to help you detect CO gas concentrations timely and accurately, reducing the risk of CO poisoning and protecting your life. It is a must-have tool for homeowners, drivers, campers, DIY-ers, tourists, etc
What You Get You will receive 1x CT-300 Carbon Monoxide Detector, 1x Protective Case, 3x AAA Batteries, 1x User Manual. We also provide a 36-month after-sale service and lifetime technical support. Please feel free to contact us if you have any questions or concerns
Visual & Audible Alarm The travel CO detector uses both visual and audible alarms. When the concentration of CO reaches the alarm threshold, the screen changes color and emits an urgent alarm sound to alert you of the presence of CO gas in your surroundings, allowing you to promptly detect the danger, protect yourself
User-Friendly Functions With high-quality ABS+PC material and anti-slip edge texture, CT-300 is durable and portable; It can be used for 40 hours with new batteries; Low-power indicator will remind you of time to change batteries; It will automatically switch off when not in operation or when no gas is detected within 10 minutes to save power; Backlit screen for easy viewing, adaptable to dim environments

Newentor CO2 Monitor, Air Quality Monitor Indoor Carbon Dioxide Detector with Voice Alert Large Display, Temperature Humidity, Alarm Clocks for Home, RV, Office, Classroom, 400-5000ppm, Black

Newentor

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High-precision CO2 Sensor The CO2 detection adopts the most advanced sensor of Swiss Sensirion's unique PASens technology, and adopts the photoacoustic detection principle to perform accurate and reliable measurements in a wide range of concentration areas and applications.
Clock Calendar and Alarm Clock This indoor air quality meters can also be used as a daily clock and alarm clock, with multiple functions to make life more convenient.
Temperature and Humidity Monitor Temperature and humidity are closely related to human body, plants or storage environment. This air quality tester has the function of real-time monitoring of temperature and humidity.
Wide Range of Applications This CO2 sensor is widely used in agricultural planting, greenhouse vegetables, production warehouses, raw material processing, daily life, computer room, wine cellar, RVs, schools, cafes, etc.

LSENLTY WiFi CO2 Detector, 5s Refresh High Accuracy Smart CO2 Monitor, App Control Indoor CO2 Meter with Alert, 1 Year Data Storage Air Quality Monitor for Home, Office(Only Supports 2.4G WiFi)

LSENLTY

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Your Smart Air Quality Monitor LSENLTY 3-in-1 CO2 monitor supports all basic functions(CO2, Temperature, and thermometer hygrometer monitor) as well as smart functions such as remote monitoring, CO2 concentration, temperature, and humidity graphs. Our indoor CO2 detectors are reliable and easy to use for homes, greenhouses, and more.
High Accuracy and Fast Refresh Time With the high-quality smart sensor, the CO2 is accurate up to 5%(CO2 detection range 400-5000PPM), the temperature is accurate up to 1.8 (Temperature detection range -10-40 ) while the humidity is 5%RH(Humidity detection range 0-99%RH). Up to 5S refresh speed always gives you the latest changes in CO2 concentration value, temp, and humidity.
Smart CO2 Alerts Once it exceeds 1500ppm, it will automatically alarm, and you can also set different alarm ranges according to your own needs. You'll receive an instant alert once the CO2 is out of its preset range. Know the status of your bedroom, baby room, wine cellar, basement, plant nursery, or other areas.
CO2 Concentration Stage This CO2 detector is designed with 3 stages of CO2 concentration normal stage (400-700 ppm), warning stage (700-1500 ppm), and dangerous stage (1500-5000 ppm). LSENLTY smart CO2 detector provides you with a more smart way to a healthy life.
Large Capacity Rechargeable Battery The CO2 detector has a built-in large capacity rechargeable battery, standby for up to 24 hours. You can check the air quality from anywhere, or have the device continuously monitor at a specific location. We recommend customers use the Indoor CO2 Meter in charging condition so that you will not worry about low battery
Full-Color Large Screen This Indoor CO2 Meter is easy to read due to a bright LCD screen with large numbers. The CO2, temp, humidity records, and comfort indicators (normal warning dangerous stage) will keep you aware of the indoor air quality at any time.
2 Easy Installation You can hang the indoor CO2 monitor to the wall for easy viewing, also you can place the Carbon Dioxide Detector on your office or living room desk. The indoor CO2 meter for grow tents is ideal for use in grow rooms, offices, kitchens, schools, kitchens, school cellars, and cars.
Data Storage Make plans according to historic CO2, temp, and humidity data. The curve graphs provide a clear data-changing track. You can export data when you need. Stay on track with your daily routine.

SwitchBot CO2 detector with Built-in Hygrometer, Temperature Humidity Monitor with carbon dioxide monitor, Bluetooth CO2 Monitor, 2-Year Data Storage, SwitchBot Hub Required for WiFi Function

SwitchBot

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Portable and Durable Our air quality detector measures 3.6" x 3.1" x 0.9" and weighs just 0.34 lb. It has a built-in battery with up to 12 months of life and a low battery warnings. Features wall-mount holes and an adjustable bracket for versatile placement in any environment.
High Precision Sensor Featuring NDIR Swiss industrial-grade sensors, this device accurately monitors air quality by measuring CO2 levels every 1 second with an accuracy of 50 ppm and a range of 400-9999 ppm. Its high sensitivity and stability ensure rapid and precise air quality feedback.
Multiple Alarm Methods Customize CO2, temperature, and humidity range with trigger alerts. When limits are exceeded, you'll be notified via sound alarms, visual screen alerts, and app notifications (SwitchBot Hub required). Ensuring you can monitor air quality effectively at all times.
Part of SwitchBot Ecosystem With A SwitchBot Hub, exceeding CO2 levels can automatically activate your Battery Circuit Fan or Evaporative Humidifier for enhanced ventilation. Hubs also enable third-party voice control, simplifying air quality management.

Mini LCD Carbon Monoxide Detector CO Alarm Detector, fit for house, Car,trip，Comply with EN50291

YZIF

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Mni CO Detector The electrochemical gas sensor in this CO detector is very sensitive to any CO leakage to your home detector. Mini Size 6.2CM*2.8CM
LED&Sound The LED indicator flashes red, and the alarm volume is 85 dB to remind all family members when CO is detected.
What included for package 1X CO ALARM, 2Xscrews,1 X english manual ( 2piece AA battery not inlcuded)

FireAngel Digital Carbon Monoxide Detector with 10-Year Sealed for Life Battery - FA3322 Humidity, Temperature and CO Alarm - Portable Carbon Monoxide Alarms for Home and Travel - CO Detector Monitor

Fireangel

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TEMPERATURE AND HUMIDITY ALERTS The FireAngel carbon monoxide alarm also provides temperature and humidity readings. Warnings will sound if either reach extreme highs or lows, making the device perfect for bedrooms and living spaces.
LIFETIME BATTERY Each digital CO monitor contains a 10-year battery sealed within, offering protection for the lifetime of the device without ever needing to change the batteries.
PORTABLE CARBON MONOXIDE DETECTOR Each device comes with an integrated mounting bracket and screws for an easy-to-fit setup. Measuring 120 x 76 x 31 mm, it s compact enough to travel with, providing on the go holiday protection.
SAFETY ASSURED The FA3322 carbon monoxide monitor has been rigorously tested and is certified to Kitemark standard KM551504. Suitable for domestic premises only.
FIREANGEL HOME PROTECTION In addition to our CO detectors for home use, we offer a wide range of other safety products designed to protect you and your family. Choose from smart and wireless devices, as well as standard fire, smoke, and heat alarms.

£ 28.62

£ 17.99

Carbon Monoxide Detector with LCD Digital Display, CE Certified CO Alarm with Sealed in 10 Year Battery, Standalone Audible CO Detector for Home,Black,1 Pack

XINDUM

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Accurate Relialbel CO Detector Comply with EN 50291 standard, CE Certified Carbon Monoxide alarm, equipped with high accuracy and reliable electrochemical sensor, continuously measure CO concentration in ambient air.
Loud Alarm Warning Carbon Monoxide can't be found with human natural senses. You can see real-time CO levels on LCD display. When a dangerous level of carbon monoxide is detected, the red LED will flash and the 85dB audible alarm will alert your families.
Easy Intsalltion The CO alarm can stand freely on the desk, also can be wall mounted with double side tape without drill, or drill to install with screw kits. With the bracket, the CO detector also can be taken down even wall mounted.
Low Battery & End of Life Warning If the battery is low , the CO alarm beeps once every 60 seconds, and the yellow LED indicator flashes once. If the CO detector reaches the end of service life,the carbon monoxide beeps twice every 30 seconds, and Yellow LED indicator flashes twice.

Brandson - CO2 Detector, Co2 Monitor Carbon Dioxide Detector Alarm, Co2 Sensor Digital USB, Indoor Air Quality Sensor Monitor with Temperature Humidity for Home Office Gym Car

Brandson

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TECHNICAL DATA Measuring ranges CO2 400 - 5000 PPM, deviations +- (50ppm + 5%); Temperature -9.9 C to + 50 C; Humidity 0% - 95%; +-6% DIMENSIONS 82 x 82 mm, depth 26 mm Screen size 8.5 cm 3.34 inches WEIGHT 108 g SCOPE OF DELIVERY Brandson carbon dioxide meter with rechargeable battery, USB to 3.5mm DC hollow plug cable and user manual.
WITH PRACTICAL ALARM FUNCTION You are warned when the CO2 content reaches a critical value (default 1000 PPM). The limit value can be set individually Classification of the display up to 600 PPM very good air quality 601 - 1000 PPM good to moderate 1001 - 1500 PPM moderate to poor over 1500 PPM very poor - urgently supply of fresh air!
POWER SUPPLY Hollow plug power connector for charging and mains operation integrated Li-Ion battery 500 mAh incl. USB to DC hollow plug cable for battery charging and power connection.
SCOPE OF FUNCTIONS CO2 meter with alarm function Limit values can be set individually Touch LCD display with 4 brightness levels 4-stage round display Alarm clock with snooze function Display of temperature (C and F), time (12 24 h) and humidity Display of battery level, feel-good symbols (smileys), ventilation recommendation, Co2 warning and CO2 alarm Buttons On OFF switch, + - rocker switch, Settings button

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Safeliveo Wireless Interlinked Wifi Smoke Alarm Heat Alarm Carbon Monoxide Alarm with Remote Control, App notification,10 Year Battery, 85dB Buzzer, Silence and Test Function,CE & BS Certified 6Pack

Safeliveo

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Pre-Linked 1 x WiFi Smoke Alarm, 2 x Smoke Alarm, 1 x Heat Alarm, 1 x Carbon Monoxide Detector, 1 Remote Control. This bundle has been 'Pre-Linked', after you receive the alrms, you only need to test detectors after switching them on according to the instruction manual and connect the WiFi smoke detector to your mobile phone, pay attention to use 2.4g WiFi.
Reliable Wireless Interlinked Alarms CE-certified detectors, complies with the standards EN 14604 2005 and EN14604 2005 AC 2008. The LED of all the detector for home doesn't flash in normal state. When you sleep at night, there is no annoying flashing LED light, it will not affect your night's sleep.
Share Device with Your Family One of the detectors in this kit can be connected to mobile phone(Please check the instructions carefully) After the wifi smoke alarm is bound to Tuya app on your mobile, you can send the link to your friend or family member through the 'device share function, and after he she accepts it, then you can all receive the notification message when the smoke alarm sends out a notification.
Wireless Interlinked Alarms Up to 30 wireless alarms can be linked together, when an alarm starts, all alarms go off and each detector can protect an area of 40 square metres. It is recommended to install fire detectors in any bedroom, warehouse and basement. This interconnected smoke detector is covered by a two-year warranty, during the time of use, if you encounter any problems, please feel free to contact me anytime, we will do our best to solve the problem for you!
10 Years of Continuous Protection&Convenient Installation High reliability, up to 10 years of continuous operation due to high efficiency and high battery capacity. Saves you from frequent battery changes and provides uninterrupted 24 7 protection, even during power outages. The package contains double-sided adhesive tape as well as the screw set, you can install the detectors for home quickly and cleanly, choose the right installation method according to different ceilings.

Carbon Monoxide Detector, KARUOTOP 10-Year Sealed Battery CO Alarm with Digital LCD Display, Battery Powered Carbon Monoxide Alarm for Home, EN 50291 Standard

KARUOTOP

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Dependability & Precision Certified by UKCA and compliant with EN 50291 standard, this reliable CO alarm can precisely measure carbon monoxide levels in ambient air. In the event of a potential hazard, it immediately sounds a loud 85-decibel alarm to warn your family.
Flexible Installation This carbon monoxide alarm features a versatile free-standing design, making it easy to place on a tabletop or mount on a wall. Its portability also allows you to take it with you while traveling, ensuring your safety wherever you go.
Intuitive LED Indicators The CO alarm is equipped with 3 LED indicators that provide clear information about its working status a green LED flashes once every 60 seconds to indicate normal operation, a red LED indicates an alarm condition, and a yellow LED indicates a failure.

This ranking is created through algorithmic analysis of millions of products tailored specifically to your search. We aim to find the most suitable product for you based on manufacturer information and price. The ranking reflects our opinion and should serve as a good starting point for your purchase. We would like to point out that we have not tested the products ourselves and link to selected online shops and partners from which we may receive compensation.

You might also be interested in these carbon dioxide detectors.

Therm La Mode CO2 Monitor Detect Indoor CO2 Temperature & Humidity, Real-Time Display Carbon Dioxide Detector, Indoor Air Quality Monitor Which Can Set Alert Value.

WHAT YOU GET 9C carbon dioxide monitor; type-C USB charge; user manual; one-year warranty. And If you give it to others as a gift, you will get her his compliments for you from her his heart.

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Kidde 10LLDCO Ten Year Life Carbon Monoxide Alarm Digital Display with Sealed Longlife Battery

Digital display that shows current CO levels (from 10 ppm)

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INKBIRDPLUS Portable CO2 Detector, Air Quality Monitor with LCD Display, Rechargeable Battery, carbon dioxide Alarm for Home, Office, Travel Camping

Large LCD Screen The portable CO2 detector features a large color LCD screen for clear, easy-to-read displays. It automatically switches to ECO mode after 5 minutes of inactivity, saving energy without compromising performance

~~£ 49.99~~ free shipping

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Google Nest Protect - Smoke Alarm And Carbon Monoxide Detector (Battery)

It tells you what the danger is and where it is. The Split-Spectrum Sensor looks for both fast-and slow-burning fires. It also has a 10 year CO sensor so that it can tell you where poisonous, invisible CO is hiding.

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Carbon Monoxide Detector, 10 Years Battery Carbon Monoxide Alarm, CO Alarm with LCD Display and Test/Silence Button Conforms to EN50291 Standard

Easy to Use It can be easy wall mounted or free standing; you can take it during travel to protect you especially when there has fireplace or smoke

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Netatmo UK NCO-UK Smart Carbon Monoxide Alarm, White

The Self-Test feature checks the Carbon Monoxide Alarm is functioning correctly and alerts you if necessary.

~~£ 89.99~~ free shipping

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Metriful CO2 Monitor with Alarm, Carbon Dioxide Air Quality Detector for Home and Work, Mute and Dim Functions, Adjustable Thresholds, Rechargeable Battery, NDIR Sensor

Detect bad air quality before discomfort occurs

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X-Sense Wi-Fi Smart Carbon Monoxide Alarm Carbon Monoxide Detector, Real-Time Push Notifications via X-Sense Home Security App, Replaceable Battery, Free-Standing Design, XC04-WX

Attention XC04-WX Wi-Fi Carbon Monoxide Detector is not compatible with SBS50 base station and does not support interconnect function

~~£ 32.99~~ free shipping

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WOLF SHIELD Carbon Monoxide Detector 10 Year Sealed Battery |Portable Alarm|EN50291:2018 |No Display (Black)

Each is 7 centimeters by 7 centimeters tall, smaller than a human hand. Every room in his main room has a clean and tidy side to him Because of the built-in battery, there is no need for leaking wires. You can hang it anywhere you need it, at home, office, RV, or campsite You can rely on our cooperative alerts to protect your health and safety.

~~£ 29.99~~

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Smoke & Carbon Monoxide Alarm with Digital LCD Display, AEGISLINK Combination Smoke and CO Alarm Detector with 10-Year Lifespan & Replaceable Battery and Test/Silence Button, SC200

Informative LCD shows real-time CO concentrations and battery power to monitor for CO leaks and battery level; to save power, it will activate only when the device is tested or the ppm has reached the alarm level for a certain period

~~£ 29.99~~

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48min

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Carbon Dioxide Detector, Handheld CO2 Monitor 3 in 1 Carbon Dioxide Detector Temperature Humidity Monitor for Indoor, Indoor Air Quality Meters

Rechargeable Battery With a micro usb interface charging port and a high capacity 2000mAh battery, you can use our CO2 monitor for a long time without having to change the battery often. Charging the CO2 monitor for 2 hours will ensure 18 hours of use.

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Air Quality Monitor Indoor, 5 in 1 CO2 Monitor CO2 Detector Portable Air Quality Meter Carbon Dioxide Monitor with LCD Display, for Home Kitchen Office Car

Multi-Functional 5-in-1 Design This versatile air quality monitor can detect carbon dioxide concentration in the air, as well as HCHO, TVOC, temperature, and humidity. Get comprehensive insights into the air quality of your surroundings with this monitor. Stay informed about multiple factors affecting the air you breathe with this multifunctional device

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The best carbon dioxide detectors in comparison

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