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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

26% off

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9,8

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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.

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.

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

Google

17% off

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9,6

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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.
You'll know, from anywhere. Nest Protect can alert your phone when something is wrong at home. You'll receive a message if the alarm goes off, if the batteries start to run low or if a sensor isn't working. And you can silence your Nest Protect using the Nest app
Thoughtful, not annoying. Nest Protect checks itself over 400 times a day and lets you know if something is wrong. It also has Steam Check, so a nice, relaxing shower shouldn't cause your alarm to shout at you. And Pathlight, so it can light your way at night
Easy to install. Nest Protect only takes minutes to set up with your iOS or Android device. Once you've added each of your Nest Protects to your Nest account, they will automatically connect to each other. Nest Protect is also simple to attach to the ceiling, thanks to a neatly designed back plate

£ 90.00

£ 105.53

£ 114.00

£ 120.00

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.

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

Kidde

39% off

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Digital display that shows current CO levels (from 10 ppm)
10 year sealed battery
10 year manufacturer's warranty

£ 22.94

£ 24.00

£ 30.60

£ 37.95

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.

X-Sense Carbon Monoxide Alarm Detector 10-Year Life, Replaceable Battery Operated CO Alarm Detector with Digital Display, Conforms to EN 50291 Standard, CO03D

X-Sense

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ACCURATE & RESPONSIVE Featuring an advanced Figaro electrochemical CO sensor and a high-performance ST chipset, the X-SENSE Carbon Monoxide Alarm instantly and accurately detects concentration levels of CO, an invisible, deadly gas, while minimizing false alarms; designed to give you the earliest possible warning of CO threat with both a loud 85 dB alarm and a rapid flashing red LED indicator (the LED indicators won t disturb your sleep while the alarm is in normal working status)
10-YEAR 24 7 PROTECTION Powered by 3 replaceable 1.5 V AA batteries, and with a sensor life of 10 years, this CO alarm provides the best 24 7 protection, even during power outages; a low battery alert informs you when the batteries need to be changed, and an end-of-life warning lets you know when it s time to replace the unit
FLEXIBLE & EASY INSTALLATION No need to worry about wires or wall outlets, as our battery-operated CO alarm is provided with screws and anchor plugs, so it installs quickly and easily anywhere you want
LARGE LCD DISPLAY & HIGH SENSITIVITY Clearly displays the battery life and the real-time CO levels taken from the surrounding air, with an updated measurement taken every 10 seconds; responds to various CO threshold levels, with the lowest alarm threshold at 30 PPM, ensuring your ultimate CO protection
ATTENTION ONLY detects carbon monoxide (CO), NOT carbon dioxide (CO2)

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

LSENLTY Portable CO2 Detector, 2s Refresh High Accuracy Carbon Dioxide Monitor, 3 in 1 CO2 Meter(Temperature, Humidity and CO2 Value), 96 Hours Standby Time CO2 Monitor for Travel Camping Home Office

LSENLTY

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Portable Carbon Dioxide Detector The product has a compact size (size 7.6x7x3 cm) and is equipped with a strap design, suitable for hanging on the wall, car, or backpack. Suitable to use for camping, hanging on the wall in the living room or bedroom at home, or placed on the desktop in the office.
High Accuracy & Fast Refresh Time With a high-quality smart sensor, CO2 accuracy is 50PPM (CO2 detection range 400-5000PPM) and temperature is up to 1.8 (temperature detection range 14-122 ). correct. Humidity is 5%RH (humidity detection range 0 to 95%RH). Always see the latest changes in CO2 concentration, temperature, and humidity with an update rate of up to 2 seconds.
CO2 Alarm Function When it exceeds 1500ppm, the alarm will sound automatically, and you can also set different alarm ranges according to your needs. You will receive an alert as soon as CO2 exceeds a preset range. Understand the condition of bedrooms, baby rooms, wine cellars, basements, plant nurseries, and 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 danger stage (1500-5000 ppm). LSENLTY CO2 detector provides you with a healthier life.
Large capacity rechargeable battery Built-in 1000mAh lithium battery, can be fully charged within 3 hours and can be used for about 96 hours. If there is no operation for 5 minutes, it will automatically go into energy-saving mode but don't worry, the carbon dioxide detection function will continue. Suitable for travel, car, home, office, etc.

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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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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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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HOMELYLIFE Carbon Monoxide Detector, Battery Operated Carbon Monoxide Alarm with LCD Digital Display, EN 50291 CO Alarms Monitor for Home Safety (AA Battery NOT Included)

Safe & Reliable HOMELYLIFE carbon monoxide alarm conforms to the latest EN 50291 2018 standard, uses an electrochemical high sensitivity sensor with a lifetime of up to 5 years, can detect carbon monoxide gas leaks accurately and quickly, protecting you from hazards while minimising false alarms

~~£ 19.99~~

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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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5 in 1 CO2 Detector ABS Carbon Dioxide Monitor Indoor Air Quality Monitor with Battery Operated for Homes and Kitchen

Multifunction 5 in 1 meter can detect carbon dioxide concentration in air, and HCHO, TVOC, Temp, Humi, can meet your using requirement

~~£ 22.73~~ free shipping

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Safeliveo Carbon Monoxide Alarm, Carbon Monoxide Detector with Silence Button 10 Years Sensor Life for Home Safety, CO alarms Replaceable Batteries Powered - EN 50291 Standard,Standalone,1 Pack

Crafted with high-quality materials Our carbon monoxide detectors are constructed using premium materials to ensure durability and reliability in detecting harmful gas levels

~~£ 16.99~~

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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

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.

~~£ 39.99~~ free shipping

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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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Mini Carbon Monoxide Detector, Battery Powered CO monoxide Alarm with LCD Digital Display for Home and Car Safety, CO Monitor Conforms to EN 50291 Standad (1pcs)

Accurate Detection Our carbon monoxide alarm utilizes an advanced electrochemical sensitivity sensor, to accurately and quickly detect carbon monoxide gas leaks, effectively protecting you against potential hazards while minimizing false alarms.

~~£ 11.99~~

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Scondaor Carbon Monoxide Alarm Detector EN 50291 Certified, CO Alarm Detector with Digital Display, Battery Powered, 10 Year Sensor

High Valued Alarm Features Automatic self-check function, Alarm concentration record and Test Silence features. False alarm can be silenced by press "Test" button

~~£ 28.99~~ free shipping

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Carbon Monoxide Detector CO Alarm with 10 Year Sealed Battery LCD Digital Display and Sound Warning for Home Office safety EN50291

Display Screen and Indicators this carbon monoxide alarms for home provides real-time carbon monoxide levels, which is a great advantage for immediate response.

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The best carbon dioxide detectors in comparison

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