Best Test Co2 Melder 2025

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Last Updated - 09/06/2025

Best Choice

01

X-Sense

X-Sense CO03D Carbon Monoxide Detector with Digital Display, CO Detector, Accurate Sensor with 10-Year Life, Replaceable Battery, Certified According to EN 50291

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9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Quality assurance: Tested by TÜV Rheinland and in accordance with the standard EN 50291.
Large LCD display and high sensitivity: Clearly displays battery life and real-time CO values from the ambient air, with an updated measurement every 10 seconds; responds to various CO thresholds, with the lowest alarm threshold at 30 ppm to ensure your ultimate protection against carbon monoxide.
Flexible and easy installation: No need to worry about cables or sockets, because our battery-operated CO alarm comes with screws and anchors, so it can be quickly and easily installed anywhere.
Accurate and responsive: Equipped with an advanced electrochemical Figaro CO sensor and a powerful ST chipset, the X-SENSE carbon monoxide alarm instantly and accurately detects the concentration values of CO, an invisible, lethal gas, while minimising false alarms; designed to warn you of a CO threat as early as possible, with a loud 85 dB alarm and a fast flashing red LED indicator.
10-year protection around the clock: With 3 replaceable 1.5 V AA batteries and a sensor life of 10 years, this CO alarm provides the best protection 24/7, even in the event of power outages; a low battery warning alert informs you when the batteries need to be replaced, and an end-of-life warning lets you know when it's time to replace the unit.

32,99 €
Value for Money

02

ABUS

ABUS CO2 Detector - CO2WM110 AirSecure - Meter for Air Quality, Humidity and Temperature in the Room - with Alarm and CO2 Traffic Light - 10-Year Sensor

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14% Off
9.5

Excellent

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Main highlights

Use: for schools, offices, nurseries or at home – avoid bad air – prevent headaches, discomfort and increased number of aerosols in the breathing air
OLED display: displays CO2 content, temperature, humidity, date and time
Mounting: mount warning detector on the wall or place on chest of drawers, table or similar
Function: CO2 detector for monitoring the CO2 concentration indoors thanks to the NDIR sensor - always see whether the indoor air quality is good, normal or poor (traffic light system)
CO2 sensor: max. Service life of 10 years, then replace the CO2 meter
Alarm: warning tone and change of the LED colour display in case of poor air quality - in case of absence, the alarm message can be viewed later

24,90 € 29,00 €(14% Off off)
03

Smartwares

Smartwares Carbon Monoxide Detector, 10 Year Sensor, 1.7 Test Winner Rating, with Display and Test Button - FGA-13041

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9.3

Excellent

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Main highlights

TEST BUTTON Make sure your device is working properly by testing it regularly (once per month).
Effective protection against carbon monoxide (CO): this detector with a range of 20 to 40 m² has an electrochemical sensor that detects the CO in the air, even with a small amount (approx. 27 ppm).
Easy to install: the necessary mounting material is included. Install one CO detector per floor, near your combustion equipment and near rooms. Make sure the alarm of 85 dB is audible by everyone.
DISPLAY: The display of the carbon monoxide detector shows you the CO concentration (PPM) and shows possible malfunctions: batteries or device at the end of life, incorrectly installed.
10 years sensor: the sensor of this CO detector has a service life of 10 years. The detector is powered by 3 AA batteries which are included. You will be warned by bright and acoustic signals that you need to change the batteries or replace your device.

23,99 €
04

X-Sense

X-Sense XC0C-SR Carbon Monoxide Detector, 10 Year Sensor, CO Detector with Replaceable Battery and Digital Display, Carbon Monoxide Detector with Test Button

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9.2

Excellent

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Main highlights

Versatile placement options: this freestanding CO detector can be placed on any flat surface, such as a desk, bookshelf or nightstand; screws for wall mounting are also included
Slim and compact: this small and discreet CO detector measures just 75 × 142 × 32 mm and looks good in any room. Style and safety go hand in hand here
Intuitive operation: thanks to the separate buttons, this detector is quick and easy to use even in emergency situations; it provides reliable access to important functions such as checking CO peaks or testing/mute the alarm
Easy to understand: the current CO value is displayed on a clear display; a three-colour LED informs you at a glance about the status of the detector: red for alarm, yellow for error or low battery and green for normal operation
10 YEAR LIFESPAN Protect your loved ones from the silent threat of carbon monoxide with this reliable CO detector that will accompany you for 10 years! The detector is powered by replaceable AA batteries with a service life of 3 years

18,99 €
05

Ruan

Carbon Monoxide Detector, 10-Year Battery CO Detector with LCD Display and Silent Test Button, EN50291 Compliant, Carbon Monoxide Warner (TCS0202A)

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9.1

Excellent

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Main highlights

Quality assurance: the products have been tested and comply with EN50291 standard, so you can shop with a clear conscience
Precise alarm: when the indoor CO level exceeds the norm, the clear LCD display shows the value in time, the red alarm light will light up and the 85dB alarm will sound so you don't miss the alarm
Electrochemical CO Sensor: the CO detector is equipped with an electrochemical carbon monoxide sensor that quickly and accurately detects dangerous CO concentrations from 23ppm to 999ppm and emits an alarm sound above 85dB to warn you as early as possible
Easy to use: this carbon monoxide detector can be wall mounted, also can be placed on the table, small and beautiful. Suitable for a variety of places, home, office, hotel, caravan is also suitable to bring travel
Carbon monoxide detector with 10 year battery: battery and sensor life of up to 10 years (up to 10 years from the first power-on) with test and mute functions for a secure feeling

18,99 €
06

DGSFFHFSD

Carbon Monoxide Warning Detector LCD Display CO Detector 85 dB Alarm Carbon Monoxide Sensor Carbon Monoxide Detector with Test Button Battery Operated (without Batteries) GAS-96776

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19% Off
9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Quality assurance: We specialise in the development and production of carbon monoxide warning detectors. We offer you 30-day 100% return guarantee and lifetime customer service. Your satisfaction is our greatest motivation. If you have any further questions, please contact us directly. We will answer you within 24 hours.
LCD display: carbon monoxide as a deadly breathing gas, you cannot perceive it with your natural senses. The LCD of the carbon monoxide detector shows the carbon monoxide concentration when the air contains 30 ppm. Thanks to the LCD display of the gas detector, you can read and monitor the CO concentration at any time and avoid the occurrence of hazards.
Highly accurate CO sensor: the carbon monoxide alarm uses sensors based on The CO detector continuously measures CO densities in its ambient air. As soon as the concentrations reach corresponding limits, these detectors give an audible alarm. As a rule, you will attract attention when flashing LEDs.
Flexible and easy installation: no wiring and sockets required, because our battery-operated CO detector screws and wall dowels are available, which can be quickly and easily installed anywhere.
85 dB alarm and battery drive: In an emergency, the carbon monoxide alarm sounds an alarm over 85 dB, which can immediately alert people throughout the house. The carbon monoxide alarm uses the replaceable batteries (2 x 1.5 V AA). A "chirp" every 30 seconds indicates what is reminiscent of low batteries and ensures that you don't miss a battery change. (Batteries not included)

16,55 € 20,49 €(19% Off off)
07

Putogesafe

Putogesafe Carbon Monoxide Detector with LCD Display, 10-Year CO Detector with Replaceable 3-Year Battery, Portable CO Alarm with Peak Memory for Motorhome/Ship/Room, EN50291-Certified, Pack of 1

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19% Off
8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Memory for CO peak concentration: The LCD display automatically records and stores peak CO levels, allowing you to determine if an alarm was triggered in your absence based on the recorded spikes.
Durable protection: A 10-year service life for CO detectors with 3-year replaceable batteries ensures safety in the home, reducing costs for your family.
Compact and portable design: Wall mounted or freestanding, 2 mounting options available. The compact and portable design of the carbon monoxide detector makes it suitable for a variety of situations, e.g. in offices, hotels and travel.
Child- and elderly-friendly: This CO alarm has a 3-colour LED display (green, yellow, red) that indicates various operating states such as alarm, low battery or malfunction along with sound signals that make it easy to identify the alarm status.
Advanced CO (carbon monoxide) sensor: The CO detector is equipped with an electrochemical CO sensor that quickly and accurately detects dangerous CO concentrations from 23 ppm to 999p pm and emits an alarm sound of more than 85 dB to warn you as early as possible.

18,97 € 23,49 €(19% Off off)
08

X-Sense

X-Sense XC01-R Carbon Monoxide Detector with Digital LCD Display, CO Detector with Replaceable 5-Year Battery and Peak Memory

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34% Off
8.5

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Precise and reliable: equipped with a Figaro electrochemical CO sensor and a replaceable battery with a life of 5 years
PLEASE NOTE: STANDALONE, NOT COMPATIBLE WITH THE SBS50 BASE STATION
Instant alerts: A loud 85 decibel alarm alerts you of dangerous CO levels early
INTUITIVE LIGHT A 3-color LED indicator flashes red, green or yellow to alert alarm, power supply, or fault
INFORMATIVE DISPLAY An easy to read LCD display shows CO values in real time and stores CO peaks since the previous reset
FLEXIBLE INSTALLATION This detector can be easily installed on the wall or freestanding and can even be used when traveling

23,02 € 35,39 €(34% Off off)
09

Nemaxx

NEMAXX® Carbon Monoxide Detector with Aucustic & Optical Alarm - Co Detector House & Motorhome / Caravan Carbon Monoxide Detector Carbon Monoxide Detector Carbon Monoxide Meter Battery Operated

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8.3

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

️ Low battery warning:
Test button for function test
Strong anti-interference
Portable and compact
LCD display
High strength and stability
High sensitivity thanks to electrochemical sensor
Easy to install
Acoustic (>85 dB) and optical (LED) alarm
24 hours protection for you and your family

19,90 €