Best Indoor Air Quality Meters in 2026

The perfect companion for indoor environments, allowing you to monitor CO2 levels, temperature, relative humidity, and atmospheric pressure in real-time

Easy for anyone to use – the color coding and the optional buzzer warns you when the CO2 concentration gets too high

Power-efficient e-ink display ensures super long battery life for this wireless device (up to 4 years)

Fully customizable ppm deadband and CO2 set point allow flexibility in programming

Trend chart records CO2 levels per minute, hour, day and week for accurate analysis of CO2 distribution

Adjustable trend chart zoom levels let you trace your ppm levels

⚛️ ACCURATE: Carbon Monoxide (CO) gas detector, 0-1000ppm with 1ppm resolution. USA NIST Calibration. Turn ON and GO.

🌇 DETECT: Electrochemical cell sensor with error better than ≤±5% F.S. and response time: T<30s. Zero and span calibration options. Comes factory calibrated.

🎆 ALARMS: Adjustable audio, visual, and vibration alarms alert when preset levels are reached. Alarm digital time stamp and logging.

🏕️ [High-precision CO2 Sensor]: The CO2 detection adopts the most advanced sensor of Swiss Sensirion's unique PASens technology, and adopts the photoacoustic detection principle to perform accurate and reliable measurements in a wide range of concentration areas and applications.

🔔 [Carbon Dioxide Concentration Alerts]: The CO2 concentration alert value can be customized to make our life, work or production environment safer.

💧 [Temperature and Humidity Monitor]: Temperature and humidity are closely related to human body, plants or storage environment. This air quality tester has the function of real-time monitoring of temperature and humidity.

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.

Measuring Range CO2: 0~9999ppm

Temperature Range: -10.0~60.0°C (14~140°F) /Resolution: 0.1°C/°F / Accuracy: ±0.6°C / ±0.9°F

CE Marking, passed the standards and had been approved by European Directives for health & safety

MULTIFUNCTIONAL & SCIENTIFIC – As our newest model, this indoor air quality monitor accurately assesses temperature in Celsius, humidity level, and multiple measures of air quality including concentrations of formaldehyde, total natural & synthetic volatile organic compounds causing most odors (TVOC), and fine particulate dust matter (PM2.5/PM1.0/PM10) which travel deeply into the respiratory tract, reaching the lung alveoli.

PORTABLE TESTING – Spot check indoor air quality anywhere or leave device on for continuous monitoring. This easy-to-carry air quality tester can help monitor air quality at home, in the car, and in hotel rooms. The lithium battery provides portable power when DC 5V micro USB charging is not available. Information is displayed on a clear 2.8” 320 x 240 pixel color LCD display.

ADVANCED FAN & SENSORS – This air quality monitor has a built-in fan to quickly draw in ambient air to allow REAL-TIME measurements. It incorporates a laser sensor to measure levels of dust particles and has a second electrochemical semiconductor sensor to test air quality including formaldehyde and natural/synthetic organic compound levels.

【Award-winning Multifunction Air Quality Detector】Qingping Air Monitor shows a full picture of Indoor Air Quality (IAQ) by monitoring PM2.5, CO2, TVOC, temperature, and humidity. It provides real-time data of weather forecast, AQI, and UV index (forecast of AQI and UV is not available in the US). You can also check the date, calendar and time on the screen (need to connect it to the network to access the right time zone). The product with elegant design has won an iF and a Red Dot design awards.

【Accurate and Reliable Measurement】The product is fast-responding and sensitive with a 1.2GHz 4-core A7 chipset. The product has top-level sensors built-in, along with the multi-mode compensation algorithm, the measured data is accurate and reliable. The innovative design of the vents enables sufficient contact between the air and the sensors to improve efficiency. The evaluation and colorful bar under readings help you to interpret the indoor air quality.

【High-resolution Touch Screen】The 3.1'' IPS touch screen with 328 PPI is ultra-clear. The brightness can be adjusted automatically. Each metric is with a color indicator under the number, so you can understand the indoor air quality and the temperature/humidity level of your room at a glance. You can touch the numbers or slide to switch the interfaces, all the operations are smooth and easy.

Acrylic clear case shell, high transmittance to be looked through

2.8" TFT screen, colorization display, wide angle vision up to 180°

High sensitivity sensor ensures the high accuracy in data collections

The economical 5-in-1 air quality detector use highly accurate and professional sensors to measure PM2.5, PM10, particle, HCHO and AQI.

By using our latest 3rd generation Temtop laser particle sensor and optimised PSO algorithm, it makes particle measurements become more accurate and stable and enhanced its sensor life up to 20,000 hours.

The pre-factory calibrated electrochemical sensor enhanced its accuracy and capturing formaldehyde molecules more precisely.

Know Your Air: this air quality monitor provids accurate PM2.5 information(with high quality Series Particle Sensor) in your home/office and allows you to take timely measures to keep the air quality within safe levels

3-in-1 Multifunctional Tester: displays PM2.5/AQI current and max value for 1h/24h/since last reset; also measuring the indoor temperature(°C/°F switchable) and relative humidity； Note: No outdoor temperature and humidity; will not detect mold

6 Grades Air Quality Levels Indicator: Good, Moderate, Poor, Unhealthy, Severe and Hazardous, showing you instantly what your air quality is like

Latest Generation of Formaldehyde Air Rapid Test Kit for home, office, automobile etc. indoor air quality test.

Rapid and semi-quantitative testing of air formaldehyde without the need for any equipment.

Great for on-site testing of formaldehyde inside a car, a room or furniture.

【Multifunctional Indoor Air Quality Monitor】 This indoor air quality monitor accurately assesses intemperature & humidity level, and multiple measures of air quality. Including concentrations of formaldehyde (HCHO), natural & synthetic volatile organic compounds (TVOC), fine particulate dust matter (PM2.5/PM1.0/PM10)

【Portable Testing】 Just pressing the power on/off button, keep the device turned on and it will take the measurement automatically. The lithium battery provides portable power, standby time can last for 6-8h (supplied with USB cablea and charger). Small and lightweight, weight is only 170.5g, help monitor air quality at home, in the car, and in hotel rooms. Design with LCD color screen digital display, you can see all the information clearly.

【Innovative Technology】 This indoor air quality monitor has a built-in fan to quickly draw in ambient air to allow real-time measurements. It incorporates a laser sensor to measure levels of dust particles and has a electrochemical semiconductor sensor to test formaldehyde and natural & synthetic organic compound levels.

Portable Formaldehyde HCHO , TVOC Gas Concentration Detector with 3 Colors Light (Green/Yellow/Red) Alarm for Indoor home safety

Formaldehyde HCHO / TVOC Range : 0 ~ 9.999 mg/m3 ; Resolution : 0.001 mg/m3 ; Sensor Type : Semiconductor

Built in 360 degree detector ports on top of the meter , LCD Display HCHO / TVOC Data with Blue Color Back lighting

Test Air Quality: Designed to help keep your family safe, our DIY kit determines if Formaldehyde Gas (HCHO) is in your home. Suitable for areas up to 270 square ft, use only one kit per room. To inspect the whole house, use one kit per room.

Fast, Reliable Results: To test, just follow the 6 steps outlined in the included manual. Keep air temperature and humidity unchanged while testing. You'll have visual results in 30-50 minutes. This test should only be used for your home or office.

For Better Readings: Turn off ventilation, air purifiers and anything that may affect the air for at least 8 hours prior to testing. Store unused kits in a dry, dark place. The expiration is 2 years from the production date printed on the package.

Meter measures the moisture content of materials such paper, lumber, sheetrock, concrete, and plaster, and in indoor air quality applications that detect moisture in walls, floors, and ceilings

Measures wood and paper moisture from 8 to 60 percent, building material moisture from 0.3 to 2.0 percent, and temperatures from 32 to 99 degrees F (0 to 40 degrees C)

Accuracy for testing wood or paper is + or - 2 percent, accuracy for building materials is + or - 0.1 percent, and accuracy for temperature is + or - 2 degrees F (1 degree C)

Multifunctional Air Quality Detector: The Govee Air Quality Monitor conveniently measures 3 important indexes for indoor air quality, including PM2.5, temperature, and humidity.

High Accuracy & Fast Refresh Time: With this smart sensor, the PM2.5 accuracy is ±15 µg/m³ while temperature and humidity accuracies are ±0.54°F and ±3%RH. A 2s refresh speed gives you the latest changes in PM2.5, temperature, and humidity.

Different Displays: Press the top button for the clock & PM2.5 display. Long press for 2 seconds to switch to bright screen mode & night mode. The LED indicator displays 4 levels of ambient air quality. 2.4G Wi-Fi is required to display the time.

MONITOR HEAT CONDITIONS: Determines true heat stress temperature by accounting for air currents, relative humidity and solar load in addition to air temperature and relative humidity.

MEASURES: WBGT (Wet Bulb Globe Temperature); TG (Globe Temperature); TA (Air Temperature); % (Relative Humidity).

WET BULB (WB) RANGE: 70 to 115 Deg F (21 to 45 Deg C).

<b>FINE PARTICLE DUST LEVEL</b> -- Laser air quality sensor can measure indoor dust level in real time. 6-channel tiny particle number detection (Number of particles/liter)--PM0.3, PM0.5, PM1.0, PM2.5, PM5.0, PM10; 3-channel particulate matters quality detection (μg/m³)--PM1.0, PM2.5, PM10

<b>CO2 & HCHO SENSOR</b> -- NDIR Non-Spectral Infrared CO2 Carbon Dioxide Sensor with self-calibration, Absorption chamber Optical Coating; Electrochemical formaldehyde HCHO sensor with automatic calibration, double platinum catalytic electrode, strong anti-interference ability

<b>TVOC CHEMICAL POLLUTION</b> -- Semiconductor TVOC meter can test a variety of volatile organic compounds TVOC VOCs, such as benzene, toluene, xylene, aromatic hydrocarbons, aldehydes, hydrogen sulfide etc., captures the change in molecular concentration of organic compounds at the thousandth level

🖥️🖥️【Large LED Display】This air quality monitor has a large LED display and can be used in public places such as hotels, schools, offices, etc. Monitor the air quality of your environment in real time. (Size: 11.8 in*7.5 in*1.2 in)

✅✅【8-in-1 Air Quality Monitor】can accurately monitor air quality and display CO2, PM2.5, PM10, HCHO, TVOC, temperature, and humidity in real-time. And calculate the AQI value according to the air quality.

🏡🏡【Available Anywhere】Included in the package is a desktop stand and wall mount accessories, you can place this WiFi CO2 Meter anywhere. ⚠️⚠️NOTE: Due to the different voltage, the detector must use the matching adapter for power supply, otherwise the screen may not display.

Rugged and compact: Analyzer that offers all measurement and tuning functions for boiler measurements, safety checks, flue gas analysis, pressure measurement and heating system maintenance

Easy operation: Large 5" color touchscreen, displays up to 14 measurement values, large digits, more robust than a glass display – Seeing all values at a glance without scrolling

Modern connectivity: Free Wohler A 450 app for iOS and Android, hands free measurement, sending readings to customers for their records, easy measurements in hard-to-reach locations

Measure filter efficiency

Monitor industrial cleanroom

Pre-screen indoor air quality and confidently work with indoor air quality specialists

【MINI 5-IN-1 AIR QUALITY MONITOR】The MINI 5-in-1 Air Quality Monitor can accurately detect HCHO, TVOC, CO2, temperature and humidity in the current air. Let you understand the air quality more clearly and protect the health of you and your family. The mini lanyard design makes it so convenient to carry it or hang it anywhere.

【HIGH-PRECISION AIR QUALITY DETECTOR】The portable air quality detector is equipped with high-precision semiconductor sensors, which have higher sensitivity and faster response. Measurable HCHO concentration range 0~9.999mg/m³ (±0.001mg/m³), TVOC concentration range 0~9.999mg/m³ (±0.001mg/m³), CO₂ concentration range 400~5000PPM, temperature range -10~50° C (±1°C) / 14~122°F (±2°F), humidity range 0~95%RH (±2%RH). Data is refreshed every 2 seconds.

【4-SEGMENT HCHO AIR QUALITY INDICATION & SOUND ALARM】According to the HCHO concentration data, the MINI air quality monitor can present 4-segment color indication. <0.100mg/m³ (green/good), >0.100mg/m³ (yellow/caution), >0.500mg/m³ (orange/warning), >0.600mg/m³ (red/dangerous). The default HCHO concentration exceeds 0.100mg/m³ to start the "BiBiBi" cycle alarm, once every 10 minutes. Short press the "S" key to switch the buzzer on/off.

ACCURATE DETECTION: Using non-dispersive infrared technology (NDIR), full-scale temperature range correction. Also, this precise air quality monitor has been equipped advanced NDIR sensor, providing a 15% higher accuracy than other CO2 monitors! It won't be affected by temperature or other conditions, fast response, resolution up to 1 ppm, measuring range up to 400 to 5000 ppm.

ONE-KEY CALIBRATION: PTH-5 Air quality monitor is calibrated before leaving the factory. After you receive the product, you need to stand it in a ventilated place for 6 hours before using our products. You can manually calibrate by pressing the A, B keys on the back of the product.

HUMANIZED DESIGN: The indoor air CO2 meter has three types of air quality warnings, namely a three-color LED indicator light, a facial expression display, and an 85 Hz sound warning. which makes the air quality more intuitive. Especially, when the light changes from 'Green' to 'Yellow/Red'，' Smile' emoji change to 'Sad', it's time to let the fresher air comes into your space, and enjoy the cozy moment with this CO2 meter.

5 in 1 air quality analyzer, CO2, HCHO, TVOC, temperature and humidity monitoring functions, real-time, color digital display, clear and intuitive, easy to use.

LCD screen, different font colors show different air quality, green, yellow and red represent warning colors in different concentration ranges

1200mAh large capacity battery for long working time, up to 10 Hours standby. Type-C charging interface, easy charging.

DATA LOGGING & ADJUSTABLE SAMPLING FREQUENCY- One key touch to activate the logging mode, logs up to 15999 points of data. Sampling Frequency can be set from 1 sec to 4hr59min59sec.

PC CONNECTION FOR FURTHER ANALYSIS- USB Cable & Software are included. Logged data can be output to computers for recording and further analyzing.

CONTINUOUS MONITORING- Powered by 5V power adapter (Included). Ideal for long term continuous monitoring.

【Product specifications】: The carbon dioxide monitor has a built-in battery, a USB charging interface, and supports USB charging with a specification of "5V-1A", which can be used while charging, and has a low battery reminder function. 2400 mAh battery capacity, 5v charging voltage, 100 hours long standby.

【Visual CO2 alarm system】: The comfortable expression makes the carbon dioxide concentration status clear at a glance, plus the indicator light that changes color according to different levels of carbon dioxide concentration, allowing you to easily grasp the current carbon dioxide concentration status in the air. Icon display: 0~700ppm🙂 (safety) 700~1500ppm😐 (warning) over 1500ppm☹️ (exceeding standard).

【Honeycomb heat dissipation】: The honeycomb heat dissipation design on the back not only ensures that the sensor is in full contact with the air, but also facilitates heat dissipation, reducing false alarms caused by excessive temperature and insufficient contact with the outside air.

📱【Smart WiFi Device】After your detector is connected to 2.4GHz WiFi, no matter you are indoors or outdoors, as long as your device is in a WiFi environment, you can monitor five indicators in real-time on the INKBIRD APP.

🏡【5-in-1 Air Quality Monitor】This air quality tester has built-in professional detection sensors, which can accurately monitor air quality and display CO2, PM2.5, HCHO, temperature, and humidity in real-time. And calculate the AQI value according to the air quality.

⏰【Air Quality Level & Sound Alarm】You can tell the air quality level by the three emoticons on the screen. When the carbon dioxide concentration exceeds 1000PPM, the detector will sound an alarm, and the alarm can be turned off by pressing the "🔊" button.

Checks for Carbon Dioxide (CO2) concentrations with Max/Min value recall function

Maintenance free NDIR (non-dispersive infrared) CO2 sensor

Indoor Air Quality displayed in ppm with Good (380 to 420ppm), Normal (<1000ppm), Poor (>1000ppm) indication

✅6 in 1 Air Quality Monitor: Come and try this new multifunctional air quality monitor, which can detect PM2.5, PM10, HCHO, TVOC, CO and CO2 compared to other air quality monitors at the same time.

✅Large Display: This air quality monitor features a large screen that allows you to see your test data more clearly and get results easily.

✅Portable Size: This monitor is small in size, you can use it on your desk without taking up too much desk space, and it is easy to carry.