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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

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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

22% off

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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.

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.

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

Kidde 5DCO 10 Year Life Battery Powered Digital Display Carbon Monoxide Alarm

Kidde

7% off

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Digital display of CO levels from 30ppm. Detector alarms from 50ppm.
Kitemarked to BS EN 50291-1 (domestic use). CE and UKCA marked

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

19% off

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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.

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.

WOLF SHIELD Carbon Monoxide Alarm CO Detector Battery Sealed 10 Year life Portable Mini Carbon Monoxide Monitor with Display Test Silence Button for Home,Campervan and More

WOLF SHIELD

49% off

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Absolute quality and safety WOLF SHIELD carbon monoxide monitor has EN 50291-1 2018 certificate,British Standard has accepted this as well, and CE certification. The carbon monoxide meter uses an advanced electrochemical sensor to quickly detect carbon monoxide concentration and has a sealed internal battery that can last up to 10 years under normal conditions.
High Alarm Sound and Flashing LED Lighting WOLF SHIELD CO detectors, within 1 minute, at least 85dB within 3 metres, is loud enough to wake you up at any time, and within 4 minutes the alarm reaches 82dB, with a loud enough alarm sound, can be used with confidence. the carbon monoxide detectors sound is accompanied by a flashing red LED light, it's an audible and visual dual alarm.
Test Function and Slience Function The Test Button and Mute Button can be operated by the same key. Test Function detects whether the product can be used normally by pressing the test button, and the Mute Function mutes the Carbon Monoxide Alarms when there is a malfunction of the CO alarm detector (mute for 12 hours), when the battery power is insufficient (mute for 12 hours), and when there is an alarm of low concentration of CO (mute for 10 minutes).
This mini co monitor is small, compact, durable and portable, size 1.06*1.06*0.31 Weight 76.5g, easy to carry and travel. Weekly self-test is recommended to ensure 100% effective operation of the monoxide detector over a long period of time.
Wide Range of Applications This carbon monoxide detector can be used not only in the home (one per room is recommended, kitchen, bedroom, bathroom, living room),but also in rooms where fossil fuels are used or where solid fuels are used,and where there is a risk of carbon monoxide poisoning, such as in cars, caravans, motorhomes,ships, some large public places (one per floor is recommended), offices. Rooms where boilers, cookers or open fires are used, and any possible place.
LCD Digital Display and Wall Mounted Design Two display units, PPM and COHb, for real time carbon monoxide values, and low level carbon monoxide detection, starting at 25ppm. Fitted with a Wall Mounted bracket, it can be mounted on the wall for easy use inside the house.
This co alarm has a low battery alarm function to remind the user of the alarm status. Note The co alarms time depends on the carbon monoxide concentration level, starting at 50ppm.CAUTION The following substances may cause alarms other than carbon monoxide at high concentrations methane, propane, isobutane, ethylene, alcohol, isopropyl alcohol, benzene, toluene, acetaldehyde, acetic acid, hydrogen, hydrogen sulphide, sulphur dioxide.

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

WISUALARM

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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
Quality Certificated This CO alarm has been rigorously tested and certificated by German laboratory to meet European EN 50291 standard
Display Screen and Indicators Its large LCD screen displays real-time CO readings and the 3-color LED status light flashes green, amber, or red to indicate power, fault, or alarm
Effective Notification The alarm has a build in high volumn buzzer output over 85dB at 3 meters, and low battery warning in the early 30 days to ensure an effective alarm

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

KARUOTOP

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Dependability & Precision Equipped with a state-of-the-art electrochemical carbon monoxide sensor, it precisely measures carbon monoxide levels. In the case of a potential hazard, the detector will sound a loud 85-decibel alarm as an immediate warning.
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 features 3 LED indicators that provide clear information about its working status. A green LED indicates normal operation, a red LED indicates an alarm, 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.

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

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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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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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3 Packs Carbon Monoxide Detector - AGSMXSYG Carbon Monoxide Alarms Battery Powered with Digital Display, CO Detectors Alarms Monitor for Home,RV & Kitchen

Wide Range of Applications Carbon monoxide detector is suitable for home, RV, kitchen, bathroom, etc.

~~£ 49.99~~ free shipping

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Temtop CO2 Monitor Indoor Air Quality Monitor Portable Carbon Dioxide Detector CO2 Temperature Humidity Meter for Home Office School

What's Included - CO2 Detector x 1, USB cable x 1, User manual x 1, Bracket or accessories set x 1. Tip - For real-time monitoring, we recommend keeping the device plugged in. This will enable real-time monitoring mode, providing you with the most accurate and timely air quality data.

~~£ 59.99~~ 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 all-in-one monitor. Stay informed about multiple factors affecting the air you breathe with this multifunctional device

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Neoteck Portable CO2 Meter with Monitor CO2 and TVOC Values, Carbon Dioxide Detector Multi Color Alert System Brightness Sound Adjustable for Home Indoor

Dual Monitoring Function Neoteck Portable CO2 Meter simultaneously monitors CO2 (0-5000 ppm) and TVOC (0-2000 mg m ) levels, ensuring optimal air quality. CO2 and TVOC values automatically switch every 5 seconds with an accuracy of 50ppm and size is only 80mm * 47mm * 20mm, and it is also equipped with a special hanging rope for easy carrying or hanging

~~£ 41.99~~ free shipping

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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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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

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.

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CO2 Detector, Co2 Monitor Carbon Dioxide Monitor, Co2 Sensor Digital USB Charger Air Quality Sensor Detector with Temperature Humidity for Home Office Gym Car(White)

TVOC Sensor The co2 detector design with TVOC sensor to monitor CO2 value, temperature and humidity of air quality, highly recommend to use it with USB charge

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X-Sense Carbon Monoxide Detector, Replaceable Battery Powered CO Alarm with Digital Display, Portable Carbon Monoxide Alarm for Home with CO Peak Value Memory, XC0C-SR

10-Year Lifespan Protect your loved ones from the silent threat of carbon monoxide for an entire decade with this reliable 10-year CO sensor; powered by replaceable AA batteries that last 3 years

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Carbon Monoxide Detector,Carbon Monoxide Alarm With LED display, CO Alarms Monitor for Home Safety,Comply with EN50291 Standard (AA Battery NOT Included)

Carbon Monoxide Alarm This advanced carbon monoxide detector is equipped with a sensitivity electrochemical sensor to accurately and continuously monitor carbon monoxide levels. It is also equipped with an LED display for easy-to-read values (ppm). When the concentration exceeds a certain level, the alarm sounds and the red light flashes, and a buzzer sounds as a warning. You can quickly and clearly understand the concentration of PPM and take corresponding measures, which can effectively protect your personal and property safety. To ensure complete protection, be sure to place one on every level of your home and inside each bedroom.

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The best carbon dioxide detectors in comparison

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