10 Best co2 detectors in Singapore

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Last Updated - 16/07/2025

Best Choice
01

Inkbird

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On Amazon

INKBIRD INK-CO2W WIFI CO2 Monitor, 3 in 1 Indoor Air Quality Detector, Carbon Dioxide Meter Temperature Humidity Monitor, CO2 Alarm Meter, App Control, Backlit Screen
9.9

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.
Main highlights

Wifi Connection & Remote Montior: This air quality monitor is 2.4GHz Wi-Fi capable and allows us to simultaneously monitor CO2 concentration, temperature, and humidity through the INKBIRD app anywhere anytime. Also, we can view historical data on the graphs and export them for further investigation.
Widely Application: With the CO2 monitor help, we can maintain the best air quality for our family at all times. It can be widely used in grow tent, wine cellar, car, home, office, etc. It is recommended to keep charging to use it.
Real-Time Alert Notification: Set CO2 concentration alarm value first on the INKBIRD APP, when the CO2 value exceeds our preset value, we will get alerted and get a notification message sent through the app as well.
Practical Design: This CO2 detector has a beautiful green appearance with a large color screen, allowing us to view all values at one glance. To meet different reading needs, we can easily switch temperature units between ℃ and ℉. Besides, it equips with a backlit screen and realizes checking the air quality value even in the dark.
Easy Calibration: This detector supports calibration to ensure accurate results at all times. We can press three buttons simultaneously to calibrate the detector in an open area, which is simple, easy, and fast.
3 in 1 WIFI CO2 Monitor: INKBIRD Carbon Dioxide Detector is equipped with a premium sensor, which can quickly and sensitively detect CO2 concentration, temperature, and humidity in daily life. Carbon Dioxide Range: 400 ~ 5000 ppm; Temperature Measurement Range: -10°C ~ 40°C; Humidity Range: 20 ~ 80 % RH

S$ 109.99
02

INKBIRDPLUS

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INKBIRDPLUS Indoor CO2 Detector, Air Quality Monitor, Tester for Carbon Dioxide, Temperature and Relative Humidity, Indoor CO2 Monitor with Alarm, for Grow Tents, Wine Cellars, Homes, Cars(PTH-9C)
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.
Main highlights

PREMIUM DETECTOR: This multifunctional air quality monitor can accurately detect the current CO2 concentration, temperature, and humidity in the air. It can help you understand indoor air quality at a glance
CONVENIENT CALIBRATION: To ensure the accuracy of measurement, this CO2 monitor supports the calibration function. Press three buttons at the same time in an open environment and let it stand for 200 seconds to calibrate this CO2 meter easily. This CO2 detector uses the NDIR CO2 sensor
CO2 CONCENTRATION STAGE & SOUND ALARM: 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). It will alarm you when the detected CO2 concentration is beyond the safe value you customized

S$ 96.99
03

Inkbird

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CO2 Detector Upgraded Mini CO2 Monitor Meter Portable Multi-Function 5-in-1 Air Quality Monitor Carbon Dioxide Detector Temperature and Humidity Detector Travel-Size for Home Indoor Outdoor
9.6

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.
Main highlights

Upgraded Mini 5 in 1 Air Quality Monitor: The mini air quality monitor can detect HCHO, TVOC, CO2, humidity and temperature around you at the same time. The CO2 Range: 400-5000PPM. Temperature Range: -10°C ~ 50°C (±2°C). Humidity Range: 0 ~ 99%RH (±5%RH). Detection of HCHO, TVOC can be accurate to 0.001.
Take It On The Go: You can wear it around your neck since this mini air detector comes with a strap. Wear it to detect the surrounding air while traveling, in public places or in other poor air quality locations. And you can hang it on your car or in a small space to monitor the air around you.
Real-time monitoring and Accurate: Adopted a high-precision infrared NDIR sensor and a built-in high-performance chip, which can accurately capture the weak current generated during the electrochemical reaction, to calculate the carbon dioxide measurement result.
Long-lasting: 700mAh built-in lithium battery and rechargeable. Charge 2.5 hour can be used for about 9-12 hours under normal brightness. Device comes with a USB Type-C charging cable.
Easy to operate: Just press the button for two seconds to monitor the air. It has the smart alarm: Color green number means safe, no alarm sound. Color yellow number means the value reaches 0.100mg/m³, the device will sound “Bee--Bee” twice to remind you and alarm once every 10 minutes. The same alarm goes for red numbers. And you will see the color clearly with the large screen.

S$ 38.99
Best Value
04

Kidde

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Kidde Carbon Monoxide Detector Alarm |Battery Operated | Model # KN-COB-B-LP2 White
9.4

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.
Main highlights

Test/reset button tests the unit for proper operation and resets the carbon monoxide alarm
Model KN-COB-B-LPM is similar to 9CO5-LP
Kidde's carbon monoxide alarms meet the requirements of Underwriters Laboratories (UL)
Battery operated with 3 AA batteries included; provides protection during power outages
Battery lockout system deters closing battery compartment without installation of batteries

S$ 31.60
05

LSENLTY

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LSENLTY Portable CO2 Detector, 2 Seconds Update, High Precision CO2 Monitor, 3-in-1 CO2 Meter (Temperature, Humidity and CO2 Value), 96 Hours Standby Time for Travel, Camping
9.3

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.
Main highlights

Portable Carbon Dioxide Detector The product is compact size (Size:3*2.7*1.2 inch) and equipped with a strap design, which is suitable for hanging on the wall, in the car or on the backpack. Suitable for use when camping, hanging on the wall in the living room or bedroom at home or on the desk in the office.
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 no operation is done for 5 minutes, it automatically switches to power saving mode, but don't worry, the carbon dioxide detection function remains. Suitable for travel, car, home, office, etc.
HIGH ACCURACY & FAST UPDATE TIME With a high-quality intelligent sensor, the CO2 accuracy is ±50ppm (CO2 detection range:400-5000ppm) and the temperature is up to ±1.8°F (temperature detection range:14-122°F). right. The humidity is ±5% RH (humidity detection range: 0 to 95% RH).
CO2 Concentration Level This CO2 detector is equipped with 3 levels of CO2 concentration: normal level (400-700ppm), warning level (700-1500ppm) and hazard level (1500-5000ppm). The LSENLTY CO2 detector ensures a healthier life.
CO2 Alarm Function When the value exceeds 1500ppm, the alarm will sound automatically, and you can also set different alarm ranges according to your needs. You will receive a notification when CO2 exceeds a preset range. Understand the condition of bedrooms, baby rooms, wine cellars, cellars, nurseries and other areas.
3 IN 1 AIR QUALITY MONITOR The LSENLTY 3 1 CO2 monitor not only has all the basic functions (CO2, temperature and thermometer hygrometer monitor), but also intelligent functions such as remote monitoring, CO2 concentration, temperature and humidity chart. We support this. Our indoor CO2 detectors are reliable and easy to use in homes, greenhouses, etc.

S$ 85.23
06

INKBIRDPLUS

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INKBIRDPLUS Portable CO2 Detector Mini Indoor CO2 Monitor NDIR Sensor with Full Color LCD Indicator Light Alarm Auto Calibration for Home Office Travel
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.
Main highlights

Wide Application: You will get—— 1x CO2 detector, 1x lanyard, 1x 2m charging cable, and a user manual. This portable CO2 monitor is suitable for home, office, grow tent, greenhouse, production warehouse, raw material processing, indoor home decoration, and more.
Portable and Long-Lasting: Because of its small size and portability, you can take it anywhere and hang it with the included lanyard. And it comes with a built-in 1000mAh lithium battery that can be fully charged within 3 hours and last about 72 hours.
High-Quality CO2 Detector: INKBIRDPLUS adopts an advanced NDIR sensor, which detects carbon dioxide through infrared sensing technology and has high precision, strong anti-interference, and excellent stability for detecting carbon dioxide concentration at any time and anywhere you stay.
HD Full-Color LCD Display: Its big full-color LCD screen is easy to read and eye-caring. If there is no operation for 5 minutes, it will automatically enter energy-saving ECO mode, causing no disturbance to the surrounding environment.
Dual Alarm Function: This CO2 monitor has CO2 indicator lights on its screen—green light for good (400~699ppm), yellow light for medium (700~1499ppm), and red light for dangerous state (1499~5000ppm). When the detected CO2 concentration exceeds 1500 ppm, the device will also sound an alarm to remind you. And the CO2 alarm value is customizable.

S$ 56.99
07

SwitchBot

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SwitchBot CO2 Sensor, Carbon Dioxide Concentration Meter, Thermometer/Hygrometer, Alarm - Switchbot Digital, Large Screen, High Accuracy, CO2 Measuring Device, Comfort Index, Weather Forecast, Clock,
8.9

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.
Main highlights

[Interlocking with SwitchBot Devices] When connected with SwitchBot hub products and smart circuitors, the circuit automatically turns on and off when it exceeds or exceeds the predetermined CO2 concentrations
Equipped with NDIR CO2 sensor and Swiss made temperature and humidity sensor: Uses a NDIR type CO2 sensor recommended by the Ministry of Health and Welfare to provide high precision air quality data. The Ministry of Health, Labor and Welfare recommends that the carbon dioxide concentration is less than 1,000 ppm to maintain good ventilation in the room. In addition, it is equipped with a reliable, high-precision temperature and humidity sensor that always provides the latest and accurate data
Easy to know when to ventilate: CO2 concentration, temperature and humidity, comfort index, weather forecast; *You can see the date and time at a glance. The display displays the air quality, temperature and humidity and comfort of your home, allowing you to see the air environment in your room. You can freely set the comfort range from the app. The weather forecast function requires a hub product
Data Storage and Export: The data can be stored locally for up to 38 days, and the app can be stored for up to 2 years. Visualization of data by graphing changes in CO2 concentration, temperature and humidity. The data (CSV file) can be exported and you can check the history of CO2 concentration, temperature, and humidity
Alert Notification Function & Remote Confirmation: 3 kinds of alerts "warning sound on the main unit, display numbers flash, app notifications*" notifies you of changes in CO2 concentration. Check the CO2 concentration of your room even when you're on the go, and the ventilation alarm lets you know when to ventilate. SwitchBot hub product is required
2-Way Power Supply: Both batteries and Type-C power are OK! With Type-C power supply, you can update your data every 1 second without worrying about running out of battery. You can use the battery wirelessly anywhere
(See weather up to 12 hours away) With SwitchBot hub products, the weather will be displayed up to 12 hours away from your current location, so please use it as a reference when you go out or enjoy outdoor events such as camping
(Check CO2 concentrations and temperature humidity) When connected with smart speakers such as Alexa and Google Assistant, you can check your data by saying "Telling Alexa and CO2 concentration"

S$ 70.42
08

DOEK

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Indoor Air Quality Monitor, Portable Large Display LCD Carbon Dioxide Detector Temperature Humidity Sensor CO2 Monitor with PM TVOC HCHO CO2 Sensor, for Home Wine Cellar Car
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.
Main highlights

Realtime Detection: The carbon dioxide detector can do realtime detection, with a built in high performance chip, and uses monitoring technology to report the number of air changes.
LCD Monitor: The air quality detector has an easy to read LCD monitor that displays data while color coding.
Compact Design and Versatility: The air quality detector has a compact design for tabletop placement and wall mounting, low power consumption, and is widely used in agricultural farming, greenhouse farming, etc.
Adjust Brightness: Touch the left and right buttons on the power switch to adjust the brightness of the screen according to the position.
Accurate Display: The sensor module of CO2 detector has high accuracy , good stability and anti interference, and accurately displays CO2 concentration. Humidity display and three measurement modes.

S$ 6.21
09

Norpolifomor

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Norpolifomor Portable CO2 Monitor CO2 Sensor,3 in 1 CO2 Concentration Monitor for Travel,Camping, Office, School,Home
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.
Main highlights

Real_time Air Quality Meter:This air quality tester applies for indoor/outdoor environments which allows you to monitor CO2 levels, temperature, relative humidity, and atmospheric pressure in real-time.Note:Please allow the differece (about ±50 ppm)among different CO2 detectors. it's normal as different CO2 meters equip with different NDIR sensors.
Premium Carbon Dioxide Meter: Norpolifomor Premium air quality monitor always care for our breath and health indoor/outdoor. It enable detect air pollution at different senarios,such as homes, kitchens, bedrooms, offices, schools, cars, hotels, travel, camping, etc.
Portable Air Quality Detector: CO2 Monitor built-in 800mAh rechargeable battery. It can be used continuously for about 8 hours after fullly charged. To save power,the screen backlight will automatically turn off(sleep) when there is no operation or alarm , but the detector will continue detecting concentration of CO2 yet.(The sleep time could be adjustable as per the instruction from user manual)
Necessity of Air Quality Monitor: Carbon dioxide (CO2) is no harm in low level as it coexists with our human being, but when it excesses a certain value, it will affect our breath system or other organs. It would be fatal if the concentration of carbon dioxide is too dense to breath. Thus, we ought to monitor the CO2 value of air wherever we are so that we all deserve a portable CO2 tester all the time.
Advanced NDIR Technology: Mini CO2 meter equips high precisive NDIR sensor to detect carbon dioxide value accuratly and quickly. when the concentration of CO2 in the air exceed the setting alarm value(default alarm value: 1000 PPM), the buzzer will automatically alert people to keep the room or other confined space ventilated.

S$ 52.10
10

TACKLY

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TACKLY CO2 Detector with Air Quality Monitor Sensor - Carbon Dioxide Detector with Indoor Thermometer for Home - Digital Higrometer for Indoor Humidity and Temperature (CO2 + Air Quality Monitor)
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.
Main highlights

★ REAL-TIME DATA MONITORING - This is a carbon dioxide detector that can accurately monitor CO2 concentration, air quality, ambient humidity, and temperature in real time. The product comes built-in with a high-performance chip of a sophisticated infrared sensor, uses big data algorithm recognition, has advanced technology, can already evaluate, and monitor real-time data.
★ PORTABLE AND VERSATILE - This TACKLY measuring device has a lightweight design which makes it a portable CO2 detector for travel due to its small size. It is easy to carry, and you can put it anywhere you want; therefore, it can detect gas quality in terraces, bars, bedrooms, living rooms, kitchens, offices, cars, schools, hotels, campsites. Real-time 24 hours monitoring to protect healthy life and safety, ideal for Christmas holidays.
★ CONJUNCTIVE AND WIDE DISPLAY - It has a large, wide digital display with unified record measurement on common screen. Compared with ordinary and old air quality detectors, its interface design is more concise, intuitive, with clear area division and excellent texture. It works as a temperature gauge, an indoor humidity and CO2 meter
★ CE APPROVAL / QUALITY - TACKLY CO2 and air quality meter is approved by EU agencies, and features CE certification, guarantee of use and product quality. In addition, the CO2 alarm detector is made of high-quality waterproof ABS material, and the data is updated in real time at 1.5 seconds per time, ensuring a very high consumer experience.
★ 4 IN 1: PM 2.5 AIR QUALITY CONTROL - Multifunctional home air quality tester, as it effectively measures CO2, air quality (PM2.5), temperature and humidity. It has independent NDIR sensors for measuring CO2, temperature, humidity, and laser scattering sensor for air quality (PM2.5).

S$ 43.63