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    Air Quality Monitor for Home, PM2.5/HCHO/TVOC/AQI/PM1.0/PM10

    SKU: ATO-AIR-DM103
    Light and compact indoor air quality monitor can detect PM2.5, HCHO, TVOC, AQI, PM1.0, PM10, multiple functions yet simple operation. With big LCD screen, real-time display and easy to read. Built-in large capacity Li-battery, the meter is capable of working for a long time. Low price and high quality.

    Handheld Air Quality Monitor, PM2.5/HCHO/TVOC/Temperature/Humidity

    Handheld air quality monitor for sale, supports multiple detection PM2.5/PM1.0/PM10, AQI, formaldehyde (HCHO), TVOC, temperature and humidity. The air quality meter features light and portable, large LCD display and high-capacity rechargeable lithium battery, high accuracy but low cost, best for home, office and car.

    Home Air Quality Monitor, PM2.5/PM1.0/PM10/CO2/TVOC/Temperature/Humidity

    SKU: ATO-AIR-DM601
    Best home air quality monitor for sale. Multifunctional detector for measuring PM2.5/PM1.0/PM10, CO2, TVOC, Temperature and Humidity. AQI data can also be displayed on the screen. Other functions like time, calendar and alarm clock are included. Large capacity rechargeable battery, 24-hour real-time monitoring, high accuracy, easy operation and affordable price.

    Indoor Air Quality Monitor, PM2.5/PM1.0/PM10/HCHO/TVOC/TEMP/HUM

    Favorable price indoor air quality monitor can perform 24-hour real time monitoring PM2.5, HCHO, TVOC, PM1.0, PM10, Temperature and Humidity. The air meter also support time, calendar and alarm clock functions. With four independent sensors, high accuracy and fast response. Large LCD display, showing real-time air quality readings. Light and portable, easy to use.

    Portable Air Quality Monitor, PM2.5/HCHO/TVOC/Temperature/Humidity

    SKU: ATO-AIR-DM502
    Portable air quality monitor for home/office/car, measuring PM2.5, PM1.0, PM10, HCHO, TVOC, AQI, temperature and humidity and real-time displaying on the LCD screen. Rechargeable Li-batterty, compact size and light weight, easy to carry. Easy operation, quick response and accurate detection.

    Air Quality Monitor, CO/ CO2/ Temperature/ Humidity

    SKU: ATO-PT04
    Air quality monitor used for detecting CO, CO2, voltage, temperature as well as humidity, with accurate CO, CO2 concentration. Air quality sensor installed with carbon monoxide, carbon dioxide exceeding the standard display and advanced NDIR infrared sensor. Resolution 1PPM and Input Voltage DC 5V/ 2A. Indoor air quality monitor usually apply in private cars, taxis, trucks, school buses, online car-hailing cars, official cars.

    Smart Air Quality Tester, CO2/ PM2.5/ TVOC/ PM1.0/TEMP/ HUM

    SKU: ATO-PT02
    Smart Air Quality Tester detects CO2, PM2.5, TVOC, PM1.0, temperature and humidity, supporting RS485 data output and historical data record query. Smart air quality monitor with remote Wi-Fi connection, and customers specify APP to query data, support for custom sensors and function.

    Air Quality Monitor, PM2.5 Detector

    SKU: ATO-PM-825
    Buy a smart air quality monitor online. This is a professional PM2.5 detector that uses a laser particle sensor, and USB charging and monitors PM2.5, humidity & temperature simultaneously in real-time, good choice for indoor or outdoor air quality detection.

    House Air Quality Monitor, HCHO/TVOC

    SKU: ATO-PM-11
    Portable air quality monitor for house/home, supports Formaldehyde (HCHO) and TVOC detection at the same time, semiconductor gas sensor principle, small and lightweight, handheld air quality detection, quick response and accurate result.

    Outdoor Air Quality Monitor, CO/O2/TEMP/HUM/Pressure/Altitude

    Cheap 6 in 1 outdoor air quality monitor for sale online. It is designed for measuring Oxygen (0-30% VOL), Carbon Monoxide (0-1000ppm), altitude, air pressure (300-1100hPa), temperature and humidity at the same time. This portable air quality monitor is widely used in camping, mountaineering, vehicle-mounted, sailing, barbecue and other outdoor activities.

    Air pollution is a huge and serious issue in our daily life. A good air quality monitor will be an assisstant to help you understand the air floating around you. There are various types of air quality detectors for your option. These monitors can detect different varaibles based on models - dust (PM2.5/PM1.0/PM10), formaldehyde (HCHO), CO2, TVOC, AQI, temperature and humidity. With the help of the monitor, you will be able to easily check the air quality in your home, office, car or other indoor areas.

    Working principle of air quality monitor

    The air quality monitor is used to detect formaldehyde (HCHO), PM2.5, TVOC and temperature and humidity in real time. It is small and exquisite, easy to carry. Through the inner sensors, the monitor can accurately measure the concentration of pollutants, and calculate the air quality index AQI, and give an alarm when the concentration exceeds the standard.

    The principle of the air quality monitor is to detect the signals of the front-end formaldehyde sensor, PM2.5 sensor, TVOC sensor and temperature and humidity sensor, amplify the weak signal of the sensors through an operational amplifier, remove the noise interference through the filter circuit, collect the signal through AD, use a high-precision CPU to process, and then convert it into a concentration value and display it on the LCD screen.

    Working principles of air quality sensors

    The air quality monitor is equipped with a variety of gas sensors, including formaldehyde sensor, PM2.5 sensor, TVOC sensor and temperature and humidity sensor, thus it can detect different varaibles. The below introduce the basic principle of these sensors.

    Formaldehyde sensor

    The air quality detector adopts a high-sensitivity electrochemical sensor. The HCHO sensor uses the scientific and effective electrochemical principles to sensitively and accurately detect the formaldehyde concentration in the air. When there is indeed formaldehyde existing, a low DC current will be generated. Combined with a high-precision amplifier circuit and AD sampling, the formaldehyde concentration will be measured.

    PM2.5 sensor
    The air quality monitor uses a high-precision laser sensor for PM2.5 detection. The laser sensor calculates the number and diameter of particles through laser scattering method, and finally accurately calculates the PM2.5 concentration of the measured environment, with a detection accuracy of 1 microgram/cubic meter.

    Temperature and humidity sensor
    In addition to formaldehyde and PM2.5 detection, the detector also has a built-in temperature and humidity sensor. When the temperature and humidity in the air change, the detector can immediately sense it and display the indoor environmental indicators more comprehensively.

    TVOC sensor
    The air quality monitor usually uses a semiconductor sensor to provide real-time monitoring of indoor TVOC concentrations for 24 hours a day, and provides warning alerts if the value exceeds the standards. Then, it is very suitable for home, office, and car applications.

    Air Quality Monitor with Laser Sensor

    Matters needing attention for using an air quality monitor

    • Any sensor will be affected by some external substance when working, so please keep it away from alcohol, perfume, chemical volatile gas, smoke and so on.
    • Indoor air is circulating, so the air that enters the monitor vent is different at different time, thus the formaldehyde content in the air may also be different. Therefore, it is normal that the detection value floats up and down.
    • When using the air quality monitor, avoid the fan, heater and other strong winds blowing directly the monitor vent hole, which will interferes with the accuracy of the test results. The product should be placed in a relatively stable air circulation area, so as to make sure the accuracy of the detection.
    • Before you use the device to monitor the HCHO and TVOC in the bedroom, living room, cloakroom and other rooms, it is better to seal the windows, doors for 24 hours. In addition, the average content of air is based on the average of multi-point test data in the room.

    Why do our air quality monitors only need to calibrate HCHO and TVOC and not PM2.5 and AQI?

    Our products are based on outdoor formaldehyde-free air sampling, and then taking the formaldehyde concentration in the indoor air as the comparison. Therefore, the new machine which is not used for a long time and the detection of ambient temperature changes requires calibration before testing. This calibration value has a great correlation with the subsequent detection accuracy. Calibration environment must avoid fragrances, perfumes, paints, cigarettes, air fresheners, alcohol and other chemical pollutants, so as not to damage the sensor.

    Why is PM2.5 value different from the value posted online?

    The location and conditions of the test are difficult to coordinate with the weather station, the weather station has several sampling points in the city, and the measurement data of each sampling point are also very different. The sampling points at this location are strictly required: 3 to 30 meters in height, good air circulation, not close to the chimney, furnace and other obvious sources of pollution. There are no tall buildings, trees or other obstacles that can hinder the flow of ambient air around the instrument.

    Types and hazards of indoor air pollutants

    Indoor air pollutants mainly come from decoration, decoration materials widely used in decoration, plate, paint, wall paint, glue, new furniture, adhesives and other easy to produce harmful to human health pollutants.

    Formaldehyde (HCHO)

    Formaldehyde is the main pollution from the decoration of new house. It is a kind of gas with irritating odor with release period as long as 3-15 years.


    What is TVOC? It stands for Total Volatile Organic Compounds. It contains hydrocarbon, halogenated hydrocarbon, oxygenated hydrocarbon and nitrogen hydrocarbon, and includes benzene series, organic chlorides, Freon series, organic ketone, amines, alcohols, ethesr, esters, acids and petroleum hydrazine compounds. The TVOC indoor mainly comes from the combustion of gas and natural gas, and the emission of construction and decoration materials, especially paints, coatings and adhesives=


    In PM2.5, PM refers to particulate matter, namely the solid or liquid granular material in the atmosphere; 2.5 refers to particulate matter with an aerodynamic equivalent diameter of 2.5 microns or less in ambient air. Such matters can be suspended in the air for a long time, so the higher the concentration of PM2.5 in the air, the more serious the air pollution.

    Indoor air detector is a great choice to quickly detect formaldehyde, benzene, ammonia, TVOC and other harmful pollutants in indoor air, so as to safeguard our health.