10 Best Carbon Dioxide Meters

Product Features

• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.

Product Features

Product Features

• ✅ [PROTECTS EVERY BREATH] – When it comes to the health of your family, AirKnight knows that every breath counts. Our NEWLY RELEASED 3-in-1 CO2 monitor is equipped with powerful sensors that detect CO2, HUMIDITY, and TEMPERATURE in REAL-TIME, all displayed on one sleek, clear LED screen.
• ✅ [SIMPLE, FAST SETUP] – Don't waste your precious time with complicated apps, WiFi, "data loggers" that don't really work, or badly written instructions. Our carbon dioxide sensor was specially designed to be operated by anyone, anywhere, so you can keep your space safe without a tech-induced headache. An instructional video is included also, just in case.
• ✅ [PORTABLE FOR EVERYWHERE, ANYTIME USE] – Featuring a heavy-duty 2000 mAh rechargeable Lithium-Ion battery, your AirKnight C02 monitor is designed to travel with you; monitoring your carbon dioxide levels for up to 14+ hours at a time on a single charge. Never go unprotected again!
• ✅ [2 YEAR WARRANTY AVAILABLE] – AirKnight is an American company that works tirelessly to ensure the overall quality of each portable carbon dioxide monitor with rigorous testing. Simply put: if you are not happy, our US-based team will replace your unit or give you your money back – no questions asked!
• ✅ [GROW ROOMS & HOMEBREWING] – With its customizable built-in CO2 Alarm, the AirKnight is perfect for your grow room, 4x4 grow tent, homebrewing operation, wine cellar, mushroom farm or classroom. The AirKnight humidity meter also stands guard against air pollution and helps limit the spread of viruses in air tight homes, smaller rooms, basements, and home offices.

Product Features

• 🏕️🏕️【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.
• ⏰⏰【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.
• 🛣️🛣️【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.
• 🔋🔋【LONG BATTERY STANDBY】 A 2400 mAh lithium battery is embedded inside the indoorCO2 monitor, supporting a long time of continuous use, before it adopts a large and distinct LED screen for ease for temperature or data viewing. display based on your need.
• 🚗🚗【WIDE APPLICATION】 A hanging hole is designed on the back of this portable CO2 detector so that you can hang it up to the wall for easy viewing. The indoor CO2 meter for grow tents is ideal for use in grow room, offices, kitchens, schools, kitchens, schools cellars, and cars.

Product Features

• 【Accurate & Reliable CO2 Monitor】: The portable co2 monitor built-in advanced Infrared (NDIR), high measurement accuracy, fast response, resolution of up to 1 ppm that can accurately detect an air of Carbon Dioxide(CO2), co2 meter range 400-5000ppm, temperature range -10℃ ~ 37℃ (14℉ ~ 99℉), humidity range 20 ~ 80 % RH.
• 【3 Concentration Stage & Adjustable Alarm】: The indoor air CO2 meter is designed with an adjustable co2 alarm, buzzer & 3 colors remind of CO2 concentration, our default setting of the alarm value is 1500 ppm. LCD display green when 400-1000ppm, 1000-1500ppm is displayed as orange, when 1500-5000ppm, red displayed and buzzer sound. It's time to let the fresher air comes into your space.
• 【Upgraded Rechargeable Battery】: This second-generation CO2 detector uses an upgraded rechargeable battery built-in 2400 mAh battery that can provide more than 24 Hrs long standby time when fully charged, Type-c charging design makes charging faster and easier to charge.
• 【Portable CO2 Detector】: A portable co2 meter with a hanging design makes it easy to carry and can detect the air quality in the bedroom, living room, kitchen, office, school, car, hotel, travel, campground, etc. the data can indirectly understand the presence of co2 and mold, which will send out an alarm for your health.
• 【Healthy Air & Lifetime Service】: Studies have shown air ventilation is more effective in reducing the transmissibility of any airborne pathogens. A co2 detector can prompt you to open windows for ventilation & increase fresh air to reduce co2 levels within your indoor spaces. ERICKHILL CO2 Monitor provide Lifelong after-sales service and return for a full refund.

Product Features

• This CO2 meter need to be charged for several hours first with the USB cable included in the package box after you receive it .
• The built-in 2500 mAh battery can provide more than 24 hours of standby time when fully charged, in addition to real-time power through the included usb charging cable, this enables long-term monitoring of air quality level. Press the main function key quickly to turn on/off the automatic alarm function (An alarm will be issued when the CO2 reading exceeds 1000ppm).
• Professional Infrared (NDIR) sensors require a sampling time of only 1.5s, which can display the current air quality on the screen in real time(Since the air is flowing, the value of CO2 will change, but it will always remain within a range). The air quality detector uses a 2.8 inch TFT LCD color screen digital display, which can show the readings simply and intuitively .
• A portable detector the size of a palm, is easy to carry and can detect the gas quality in bedroom, living room, kitchen, office, car, school, hotel, campground and other environments. the data can indirectly understand the presence of second-hand smoke and mold, which will send out an alarm for your health.
• Multifunctional Carbon Dioxide tester → This product fill light can detect your indoor carbon dioxide, but also display the air humidity and temperature. If you have any questions, please let us know. Your email will be answered within 12 hours. log in your Amazon account> choose "Your orders"> find the order ID> click "contact seller"

Product Features

• CO2 PPM READINGS ON A LED DISPLAY – Assess the quality of your air and help keep air fresh in any indoor space with this CO2 meter with a highly readable 2.8" 320 x 240 resolution LED screen display.
• SAFETY FOR EVERYONE – Monitor public and private spaces for excess CO2 levels caused by large groups of people in an enclosed area exhaling CO2. CO2 or carbon dioxide serves as an accurate surrogate measure of risk for indoor transmissibility of airborne pathogens. As the number of people increases or ventilation decreases, CO2 levels will rise. Increase ventilation with outdoor air to reduce CO2 levels and risk of viral transmission within your indoor spaces.
• MULTI-MEASUREMENTS – In addition, check temperature and humidity levels while reading accompanying CO2 levels.
• HEALTHY AIR & HEALTHY PEOPLE – Monitor and maintain adequate ventilation levels by opening windows to draw outdoor air and reduce CO2 levels to 450-500 ppm or less. Studies have shown air ventilation is more effective than even mask-wearing in reducing the transmissibility of any airborne pathogens.
• ORIGINAL DESIGN & USA BASED SUPPORT – We have Midwest-based technical staff including a chemist to answer any questions you have. Also included will be a 20+ page eBook on Gas and Air Quality Hazards. We have worked with the supplier that holds this air quality detector’s design rights so you can be confident this item is tried and tested.

Product Features

• 【3 in 1 Functions】: 3 in 1 air quality monitor: CO2, temperature and humidity detect, automatic and comprehensive detection of indoor air quality, widely used in home, bedroom, office, school, car, grow tents, wine cellars, hospital, etc
• 【High Precision】: The CO2 monitor adopts advanced and accurate NDIR sensor, accurately and quickly detect carbon dioxide concentration by infrared absorption intensity, and measure air quality in real time. The detection range of CO2 is 400-5000 ppm
• 【Multiple Alarms】: The carbon dioxide monitor has two alarm methods: sound and LCD display. Three LCD colors indicates different co2 rangs(400-1000PPM green,1000-3000PPM yellow,3000-5000PPM red), When CO2 monitor concentration is 1000-5000PPM, the co2 meter will make a DIDI alarm sound
• 【Temporarily Mute and Time Function】: Our CO2 meter has a time function, which is convenient for adjust the temperature, humidity and CO2 concentration according to time during work, grow tents, etc. When you know the alarm alert, you can press the power button to turn off the sound temporarily.
• 【Easy to Use】: The air gas detector has automatic calibration function. For the first time use, place the carbon dioxide detector in a ventilated place is helpful to complete accurate automatic calibration. It can be used continuously for 6-10 hours when fully charged

Product Features

• 【Multifunctional Air Quality Monitor】This 5 in 1 CO2 monitor can detect real-time accurate detect air of Carbon Dioxide(CO2), Formaldehyde(HCHO), Volatile Organic Compounds(TVOC), CO, AQI. CO detection range: 0-2400PPM. CO2 detection range: 0-5000PPM. HCHO detection range: 0-1.999mg/m³. TVOC detection range: 0-12mg/m³.
• 【Full-Color LED Screen Display】With 5.5 inch LED screen digital display design, this air quality monitor is super easy to read and shows clearly real time data. The battery displays three color states: green, orange, and red. Green indicates sufficient power. Orange indicates half of the battery. Red indicates insufficient power(Need charge it in time).
• 【Large Capacity Rechargeable Battery】The air quality detector has a built-in large capacity rechargeable battery, standby up to 5hours. You can check the air quality from anywhere, or have the device continuously monitor at a specific location. It will always take care of you and your family health.
• 【Easy To Operate】Once turn on the air quality meter, it will automatically measure the surrounding air quality for you.The air quality detector has three easy operation buttons. ON-OFF: Long press 3 seconds turn on or off. ANEW: Long press 3 seconds to reset instrument calibration. RESET: Long press 3 seconds data to clear and new detection.
• 【Multi Application】This air quality monitor is suitable for home air detection, car air detection, maternal and child room air detection, and public place detection, perfect for indoor home, school, office, and other occasions. We offer 3 months free return and lifetime warranty for our air quality monitor.

Product Features

• PRECISION CO2 SENSOR: This CO2 meter adopts SenseAir advanced carbon dioxide sensor to accurately detect CO2 levels in your home and remind you in time to take actions to avoid the harm to your health caused by high concentration of carbon dioxide.
• 4 IN 1 MULTIFUNCTION MONITOR: Not only can detect carbon dioxide, but also detect PM2.5 particles in the air and indoor temperature and humidity, All-IN-ONE, ideal choice as an air quality monitor in your home.
• 10 YEARS R&D in PM 2.5 SENSOR: Adopting Temtop core technology industrial-grade PM2.5 laser sensor, senseAir advanced carbon dioxide sensor and professional high-tech components to ensure the ultra-precision and professionalism for detecting needs.
• EASY TO USE: Comes with a USB cable, and supports USB exportation of historical data as long as 10 years at 1-hour logging interval.(exported to CSV).It also has a built-in 3000mAh rechargeable lithium battery that runs about 6-8 hours on a full charge. Both back stand and wall mounted design for convenient use.
• WHY TEMTOP: We have been collaborating with other professional sensor suppliers worldwide such as Senseair/Sensirion/ Renesas and have also been selected and recognized by several public organizations including UChicago and the Washington gov.
• WHAT YOU GET: P20C air quality monitor, charging cable, reset pin, user manual, Temtop 12-months warranty & 24/7 customer support access via email and phone. Just remember：WE ARE ALWAYS HERE FOR YOU.