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Best Carbon Monoxide Detectors - Holiday Sale

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Last Updated - 18.12.2025

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01

Ei Electronics

Ei Electronics Ei208D 10-Year Carbon Monoxide Alarm

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9.8

Exceptional

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Real carbon monoxide, calibrated
German version, intended for sale in German-speaking countries only
Carbon monoxide alarm with electrochemical sensor (with LCD display).
Built-in, non-removable 10-year lithium battery (Panasonic)
Box contents: 1x CO detector (Ei208D) with mounting plate, manual, screws and dowels

36,39 €
Value for Money

02

Fire Angel

Fire Angel Digital Carbon Monoxide Detector with Integrated 10 Year Battery - FA3322 Humidity, Temperature and CO Detector - Portable, for Home and Travel - CO Warner

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9.7

Exceptional

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Warning for low CO values: If the CO sensor detects low CO values over a long period of time, an early alarm sounds by 1 short beep, followed by 1 long beep. The yellow flashing LCD display shows "WARNING" and CO-PPM values.
Temperature and humidity warning: The FireAngel CO alarm also displays temperature and humidity. If the temperature is extremely high or low, a warning sound will sound. This makes the device perfect for bedrooms and living rooms.
TRAVEL CARBON MONOXIDE WARNER: Each device includes a built-in bracket and screws for easy installation. The compact size of 120 x 76 x 31 mm makes it easy to take with you and offers optimal protection when travelling.
Safety: The FA3322 CO detector with digital display and advanced sensor provides optimal detection. At high CO values, 4 loud beeps sound and the red LCD display shows the warning message "EVACUATE".
Battery for life: each digital carbon monoxide detector contains a sealed 10-year battery that provides protection for the life of the device without having to change the batteries.

30,00 €
03

X-Sense

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

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9.6

Exceptional

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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 €
04

Smartwares

Smartwares Carbon Monoxide Detector, 10 Year Sensor, 1.5 Test Winner Rating, with Display and Test Button - FGA-13041

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9.4

Excellent

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TEST BUTTON Make sure your device is working properly by testing it regularly (once per month). If your CO detector beeps 5 times during testing, it will work fine.
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 €
05

DGSFFHFSD

Carbon Monoxide Alarm with LCD Display CO Detector Louder 85 dB Alarm Carbon Monoxide Detector with Carbon Monoxide Sensor Carbon Monoxide Alarm Battery Operated

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9.1

Excellent

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Warranty and customer service: DGSFFHFSD specializes in the development and production of carbon monoxide alarms. We offer 30-day return policy and long-term customer service. Your satisfaction motivates our team. If you have any further questions, please contact us directly.
Safe sensors, clear alarm: the carbon monoxide detector uses particularly sensitive sensors. So you measure CO densities in their ambient air continuously. Reach concentrations corresponding limit values, give CO detectors h?rbaren alarm. Mostly flashing LEDs attract your attention.
Robust operation of the sensor: the CO gas detector is made of durable and high quality. High performance sensor, which is sensitive and durable. The operating temperature is 5 °C / 40 °C, and the appropriate relative humidity is 20-90%.
LCD display with CO concentration display: carbon monoxide as a daily respiratory poison you do not perceive with your natural senses. Thanks to the LCD display, you can read and monitor the CO concentration at any time as well as avoid the occurrence of hazards.
Battery operation: the CO detector uses the replaceable batteries (2 x 1.5 V AA). Even more convenient, integrated power cells ensure many years of operation. A chirping every 30 seconds indicates that the battery is low, then you have to replace it. (Batteries not included)

15,99 €
06

X-Sense

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

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9.0

Excellent

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Main highlights

Precise and reliable: equipped with a Figaro electrochemical CO sensor and a replaceable battery with a life of 7 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

20,29 €
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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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.

14,09 €
08

Fire Angel

FireAngel FA6812 Carbon Monoxide Detector, Portable CO Detector with LCD Display, with 10-Year Sensor, for Home, Travel & Caravan

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8.7

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

With batteries: the CO alarm contains 2 replaceable AA batteries. A yellow "! Warning light & acoustic signal indicate low battery level - change batteries and stay protected.
Tested safety: This CO sensor is CE certified and tested according to EU standards BS EN 50291-1:2018 & BS EN 50291-2:2019 - for reliable protection in living rooms, vehicles and when travelling.
Reliable CO warning: reliably detects dangerous CO concentrations with a 10-year sensor. Alerts with four loud beeps (85dB), red flashing light and indication of CO value in the display.
INTUITIVE LCD DISPLAY: The display on the CO detector informs you of current CO values, active alarms, battery status, "AL" in the absence alarm and "EOL" when the device needs to be replaced.
Compact: thanks to its handy size (120 x 73 x 35.5 mm), the carbon monoxide detector is ideal for travel and caravans. Mounting bracket and screws are included for optional wall mounting.

17,24 €
09

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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8.6

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

Warranty and customer service: DGSFFHFSD specializes in the development and production of carbon monoxide alarms. We offer 30-day return policy and long-term customer service. Your satisfaction motivates our team. If you have any further questions, please contact us directly.
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 anchors 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 above 85 dB, which can immediately alert those 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)

15,59 €
10

Yfwsrecinoe

Carbon Monoxide Detector with 10 Year Lithium Battery, Voice Alarm & LED Display - CO Alarm EN50291 Certified, for Home, Apartment, Motorhome (Pack of 1)

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8.4

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

RELIABLE DUAL SENSOR TECHNOLOGY - 10 YEAR PROTECTION FOR YOUR HOME: Equipped with a high quality electrochemical sensor, our CO detector provides reliable protection for up to 10 years - compared to conventional devices with only 3 years lifespan. Rely on modern technology for long-term safety.
PRECISE CO DETECTION - Less false alarms, more safety: The intelligent sensor detects dangerous carbon monoxide quickly and accurately - for an early warning in the event of real danger. Reduced false alarms provide more peace in everyday life and a safe feeling for the whole family.
EXTRA LOUD ALARM & BATTERY MONITORING - SAFETY YOU CAN HEAR: In case of CO hazard, a penetrating alarm sounds above 85dB - loud enough to be heard through walls. The integrated battery warning informs you in time about low charge level. For maximum safety - day and night.
EASY TO INSTALL & INTEGRATED 10 YEAR LITHIUM BATTERY: Thanks to the built-in high-performance battery, no battery change is required - 10 years protection with just one installation. Installation is quick and easy with the included accessories - without any specialist knowledge.
Tested quality and customer service with heart: certified according to EN 50291 by an accredited EU laboratory - for tested safety you can rely on. We stand behind our product with a free lifetime return policy and personal customer service - because your safety is important to us.

18,99 €