10 Best co2 detectors in Singapore

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Last Updated - 23/10/2025

Best Choice
01

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)
9.8

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
02

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
9.7

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

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.
Manual calibration: With the device off, press and hold the button for approximately 5 seconds to display "-CAL." Place the device in a well-ventilated environment, ensuring no one is near. Release the button to initiate a 200-second self-calibration countdown, which automatically exits upon completion. Note: Calibration requires an open, well-ventilated environment, and the device must be stationary to ensure accurate calibration results.
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.
Adjustable alarm thresholds ensure safety. The default alarm is set when concentration exceeds 1500ppm, but the user can also customize the alarm range. When the concentration exceeds the alarm threshold, the device will sound an audible alert, and a short press of the button can pause the alarm.
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$ 95.09
03

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,
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

[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$ 67.22
Best Value
04

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
9.3

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

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
05

Kidde

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Kidde Carbon Monoxide Detector Alarm |Battery Operated | Model # KN-COB-B-LP2 White
9.1

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$ 33.37
06

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
9.0

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

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
07

Langkou

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On Amazon

CO2 Carbon Dioxide Detector, 5-in-1 Indoor Air Quality Monitor, CO2 Meter with Alarm, Tester for Carbon Dioxide, Temperature & Humidity, for Grow Tents, Home, Bedroom
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

【Various Use】A air quality monitor is indispensable for a family. Help for detecting gas and air pollution in homes, kitchens, bedrooms, offices, schools, cars, hotels, travel, camping, parties, etc., to always protect you and your family under healthy air conditions.
【Note】Dear customer, compare with other CO2 meters, please allow the differece (about ±50 ppm). After all, different CO2 meters adopt to different NDIR sensor, so their test result is exsit the difference. Thanks for your understanding.
【Necessity of Air Quality Monitor】Carbon dioxide (CO2) is not harmful to human body when it is low, but when it overs a certain amount, it will affect the breathing of humans (and other organisms). If serious, life is threatening. Thus, we have to monitor the CO2 content of air for keeping health.
【Indoor CO2 Monitor】Compact size Body with hollow back design for carring and airflow. Big colorful LCD digital screen for people easy to identify and read. Not only monitoring the CO2 content, also can test the temperature & humidity. Air quality monitor is Keeper of family health, Perfect for home interior, such as living room, baby room, classroom, office and which closed places etc.
【Easy to Use】Each turn on, CO2 detector need to automatic calibration, so please put the air quality detector in a ventilated place, after 1-2 minutes calibrating, CO2 tester can be used normally.
【Convenient for Carrying】CO2 Monitor built-in 1600mAh battery. It can be used continuously for about 8 hours after full charging.So don't worry, take the CO2 meter to anywhere you want go.
【Air Semiconductor Sensor】4-in-1 air quality monitor adpots intelligent air semiconductor sensor to test the temperature and humidity value of air. Compare with the common sensor, it is more sensitive, accurately and stable.
【Advanced NDIR Technology】Mini CO2 meter uses high precision NDIR sensor technology to detect carbon dioxide content accurately and quickly. and it can hazard assessment, when CO2 of air exceed the setting alarm value(alarm value: 1000 PPM), it will warn to remind people to open the window or turn on air purifier for keeping balance of air.

S$ 43.44
08

Inkbird

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INKBIRD IAM-T2 Bluetooth Air Quality Monitor, Indoor CO2 Detector, Temperature Humidity Monitor, Light and Sound Dual Alert, for Home, School, Hotel
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

Smart Data Management: The IAM-T2 itself can store 30 days of offline data and sync with the INKBIRD app when connected via Bluetooth. The smart app can store long-term data and supports exporting for easy data tracking and analysis at any time, helping you to better understand and improve the indoor air quality in your home in a more scientific way
Personal Security Guard: The white backlit LCD screen allows you to check the current CO2 concentration, temperature and humidity at a glance. The IAM-T2 monitor can be placed on a flat table or hung on the wall, making it flexible and convenient to use, and can be used in any indoor environment to be a caring air quality manager for you
Long Battery Life: The built-in 3000 mAh lithium battery can be fully charged in about 6 hours and be used continuously for more than 6 months. The actual duration depends on the sampling interval you choose (1/2/5/10 minutes), the longer the interval, the longer the duration. One charge for long-time companion, no need to charge frequently
High Precision Sensors: It is equipped with a Swedish Sensirion sensor that accurately measures CO2 concentration from 0 to 9999ppm and an NDIR sensor that simultaneously measures temperature, accurate to ±0.2°C (±0.36°F), and humidity, accurate to ±1.8%RH, giving you insight into the air quality in your home
Dual Alarm System: The ultimate light and sound dual alarm system makes it unique on the market. When CO2 levels reach dangerous levels, the IAM-T2 will sound an alarm and the indicator light will turn red. Good air quality is indicated by a green light and moderate air quality by a yellow light. You can adjust the alarm thresholds to suit your family's needs, ensuring a safe and healthy home environment
3-in-1 Detection: The IAM-T2 can measure CO2, temperature and humidity all at once. It uses Bluetooth 5.0 to connect to your phone within 100 m / 328 ft, so you can check the air quality at any time at home from the INKBIRD app. It's easy to keep track of your home's environmental conditions, making every breath more comfortable and reassuring

S$ 78.99
09

Neoteck

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Neoteck Portable CO2 Detector Mini Carbon Dioxide Sensor with Acoustic and Optical Alarm Rechargeable 2-in-1 CO2 Monitor 0-5000 PPM for Camping Adventure Home Hotel
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.
Main highlights

Multifunctional CO2 detector: The Neoteck 2-in-1 CO2 meter can monitor the concentration of carbon dioxide and TVOC in the air in real time. Equipped with a high-precision sensor, the data is updated every 1 second and the CO2 and TVOC values are automatically changed every 5 seconds. The detectable CO2 range is 0 - 5000 ppm; the accuracy is ±50 ppm and provides you with more reliable and accurate data to protect your health and well-being as well as that of your family

S$ 76.97
10

Dienmern

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CO2 Monitor Carbon Dioxide Detector, 5-in-1 Indoor Air Quality Monitor, CO2 Meter with Alarm, Tester for Carbon Dioxide, Temperature & Humidity, for Grow Tents, Bedroom, 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

【Various Use】An air quality monitor is essential for every family. It helps detect gas and air pollution in homes, kitchens, bedrooms, offices, schools, cars, hotels, during travel, camping, parties, and more—always protecting you and your loved ones with healthier air conditions.
【Note】Dear customer, compared with other CO2 meters, please allow a difference of about ±50 ppm. Since different CO2 meters use different NDIR sensors, test results may vary slightly. Thank you for your understanding.
【Necessity of Air Quality Monitor】Carbon dioxide CO2 is harmless at low levels, but when it exceeds a certain concentration, it can affect breathing and overall health. In severe cases, it may even become life-threatening. Therefore, monitoring CO2 levels in the air is essential for protecting health.
【Indoor CO2 Monitor】Compact body with a hollow back design for easy carrying and better airflow. Large colorful LCD screen makes data clear and easy to read. Not only monitors CO2 levels, but also measures temperature and humidity. This air quality monitor is the guardian of family health—perfect for living rooms, baby rooms, classrooms, offices, and other enclosed spaces.
【Easy to Use】Each time the CO2 detector is powered on, it performs automatic calibration. Simply place the device in a well-ventilated area for 1–2 minutes, after which the CO2 tester will be ready for normal use.
【Convenient for Carrying】The CO2 monitor is equipped with a built-in 1600mAh battery, providing up to 8 hours of continuous use on a full charge. Compact and portable, you can easily take it anywhere you need.
【Air Semiconductor Sensor】The 5-in-1 air quality monitor adopts an intelligent air semiconductor sensor to measure temperature and humidity. Compared with common sensors, it offers higher sensitivity, greater accuracy, and improved stability.
【Advanced NDIR Technology】This mini CO2 meter adopts high-precision NDIR sensor technology for fast and accurate CO2 detection. It also provides hazard assessment—when CO2 levels exceed the preset alarm value (1000 PPM), it will alert you to open a window or turn on an air purifier to maintain healthy air quality.

S$ 44.60