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12 Best Rated Air Quality Monitors – In-Depth Reviews

37

Models Considered

94

Hours of Research

3

Experts Interviewed

496

Consumer Reviews Analyzed

T he air you breathe is not always the cleanest, nor the safest, especially if you live in an agglomerated city, with lots of cars and other pollutants around. It can be even more disturbing if you suffer from allergies and have to be on a constant lookout for anything harmful present in the air. An air quality monitor will quickly inform you about the air you have in your home, or the outside environment, measuring possible harmful substances and letting you know if it’s safe to leave your house or not. So, to help you decide upon the piece of equipment that is exactly what you’re looking for, we offer you our best recommendations.

Start working on fixing issues with air quality by using an air purifier and humidifier combo that removes airborne particles while stabilizing air moisture levels.

Top 12 Air Quality Monitors Compared

Photo Product Name Range Type Sensor for Color-coded Warranty Price
uHoo 9-in-1 Indoor Air Quality Sensor Image
Best Overall
1. uHoo 9-in-1 Indoor Air Quality Sensor
500 sq. ft. Indoor Temperature, humidity, air pressure, CO2, TVOC, PM2.5, CO, NO2, ozone 1 year
Check Price
Airthings Wave Plus 2930 Image
2. Airthings Wave Plus 2930
N/A Indoor Radon, TVOCs, CO2, humidity, temperature and air pressure 1 year
Check Price
IQAir AirVisual Pro Image
Editor’s Choice
3. IQAir AirVisual Pro
1076 sq. ft Indoor / Outdoor PM2.5 and CO2, temperature, humidity. N/A
Check Price
Temtop M2000 Image
4. Temtop M2000
N/A Indoor / Outdoor Formaldehyde, PM2.5 and PM10, CO2 and HCHO particles, TVOC, AQI, temperature, and humidity 7 days return
Check Price
Kaiterra Laser Egg+ Chemical Image
Best for the Money
5. Kaiterra Laser Egg+ Chemical
1,000 sq. ft. Indoor PM2.5, VOCs, temperature, humidity 1 year
Check Price
Awair Element Image
Best for Office
6. Awair Element
1,000 sq. ft. Indoor Temperature, humidity, CO2, VOCs, PM2.5 1 year
Check Price
 Dylos DC1100 Pro Image
Best for Allergies
7. Dylos DC1100 Pro
N/A Indoor Small particles from 0.5 to 2.5 microns, large particles greater than 2.5 microns 90 days
Check Price
EG Air EGVOC-100 Image
8. EG Air EGVOC-100
N/A Indoor / Outdoor Temperature, humidity, concentrations of formaldehyde, TVOC or fine particles of dust PM2.5/PM1.0/PM10. 1 year
Check Price
Eve Room 10EAM9901 Image
9. Eve Room 10EAM9901
Small range Indoors Temperature, humidity and VOCs 1 year
Check Price
ECOWITT WH0290 Image
10. ECOWITT WH0290
300 sq. ft. Indoor / Outdoor PM2.5, temperature, weather, and relative humidity N/A
Check Price
Yvelines Air Quality Tester Image
11. Yvelines Air Quality Tester
N/A Indoor CO2, PM2.5, PM10, HCHO, TVOC Satisfaction guarantee
Check Price
GAIN EXPRESS CO22 Image
12. GAIN EXPRESS CO22
Mid-range Indoor CO2, Humidity and Temperature 3 years
Check Price

1. uHoo 9-in-1 Indoor Air Quality Sensor

Check Price at Amazon


Specifications:
  • Type: Indoor
  • Sensor for: Temperature, humidity, air pressure, CO2, TVOC, PM2.5, CO, NO2, ozone
  • Color coded:
  • Range: 500 sq. ft.
  • Smartphone app:
  • Warranty: 1 year


Regardless of how high your expectations are when it comes to this purchase, the uHoo won’t fall short. It might be a heftier investment as opposed to the other products we review here, but it’s worth every cent once you understand fully how much of a difference it can make for air quality improvement.

9 Air Quality Sensors and an Intuitive App

It’s our top pick for a good reason – it integrates 9 sensors to detect various air quality stats. These include temperature, air quality, CO, CO2, NO2, PM2.5, ozone, and air pressure.

The companion app that you install to check the monitored stats is as user-friendly as they get. Thus, even if it’s your first time with a unit of the sort, you won’t have trouble figuring out how to read the data insights. Moreover, you are provided with personalized tips regarding air quality improvement.

Each data gets a color code so that you figure out at a glance whether or not that specific metric is within decent parameters. The color codes are red – for poor, amber – for fair, and green – for excellent. It computes hourly, daily, and monthly so that you keep track of stats more easily and compare progress in regards to how the actions that you take to reduce indoor pollution function.

Veritable IoT Device

This unit is IFTTT compatible. However, its biggest highlight is the fact that it’s compatible with other smart home devices, counting Ecobee, Nest, Google Home, Philips Hue, and Amazon Echo. Sync the sensor with the right smart device, and you can better control the environment and create pleasant conditions.

uHoo Virus Index

We live in challenging times because of the coronavirus outbreak, and people are now conscious when it comes to the air they breathe and what lingers in it more than ever. Based on the air quality data it picks up, the uHoo monitor will provide helpful insights regarding the likelihood of viruses spreading in the air indoors. The metric is rated from 1 to 10 as follows:

  • From 1 to 3: Good air quality; low chances for viruses to survive and spread
  • From 4 to 6: Moderate chances for virus survival and spreading; air quality does not pose a threat for people who are not sensitive to air pollution
  • From 7 to 8: Prolonged virus survival and increased chances of virus spreading; air quality can be detrimental for your health
  • From 9 to 10: High chances for prolonged virus survival and spreading; air quality is so poor that most people will be affected by it
Perfect for Traveling

You might want to check air quality at the office, or at the hotel where you stay during your vacation. This is all possible with the uHoo seeing how it doesn’t take up much space in the bags and doesn’t weigh a lot either (only 0.6 pounds). Beware that while the ABS material used in its manufacturing does make it durable, it is prone to cracking or breaking if mishandled. So, when you pack it in your luggage, make sure that you don’t put anything too heavy on top of the sensor.

PROS
  • Works with Alexa and other IFTTT devices
  • The 9 sensors make it capable of tracking several air quality aspects
  • Check out data insights and get personalized tips from the companion app
  • Small size and modern design make it an eye-catching addition to any home

CONS


VERDICT

As modern as they come yet easy to use due to the user-friendly app that accompanies it, the uHoo is the best product this market has to offer. Sleek, small, and integrating 9 sensors so that it checks as many air quality stats as possible, this reliable tool is a must for those who want to stay on top of the situation when it comes to pollution levels in their homes.



2. Airthings Wave Plus 2930

Check Price at Amazon


Specifications
  • Type: Indoor
  • Sensor for: Radon, TVOCs, CO2, humidity, temperature and air pressure
  • Color coded:
  • Range: N/A
  • Smartphone app:
  • Warranty: 1 year


It measures 4.72 inches in height, 1.41 inches in diameter, and it weighs 0.48 pounds. It is simple to install and use, and the app has you pretty much covered regarding everything you need to know. It keeps you updated with indoor air quality right from your phone or tablet, and you can even create a database with the previous evaluations the device has recorded.

It allows you to easily tell with a wave how the air inside your house fares due to the color-coded light ring that turns green when the air is good, yellow to warn you, and red when it’s dangerous. Just wave your hand in front of the device, and the light will turn on. Moreover, it can connect with any intelligent home devices like Alexa, Google Home, and IFTTT, so they will alert you when there’s a shift in air quality.

It can be placed on a wall, and you can secure it there with the mounting plate, as it will attach to the mount magnetically. It requires 2 AA batteries which will last you up to 16 months before they’ll need to be changed, and it needs an environmental temperature from 4 degrees C to 40 degrees C, to work out properly. It can detect up to 6 air factors:

  • radon ( up to 4 pCi/L);
  • airborne chemicals ( up to 500 ppb);
  • CO2 ( up to 1000 ppm);
  • humidity;
  • temperature( from 0°F to 77 °F);
  • air pressure (up to 0.15hPa).

It needs a 7-day period for sensor adjustment and 1 week to be able to create a template of your routine. It comes with a limited 1-year warranty from the moment of your purchase.

PROS
  • Can interact with Alexa and Google Assistant and IFTTT
  • Smartphone app for detailed air quality condition
  • Simple to use and install
  • Color-coded details for an easy read
  • Replaceable batteries

CONS
  • It doesn’t measure particulate matter
  • It needs time to calibrate to its surroundings


VERDICT

It is straightforward to install and use, as grants accurate readings right on your phone or tablet, allowing you to even create a history database to see how the quality of the air had changed. The color-coded light will quickly tell you how good or bad the air in your home is, but it will need a week to calibrate and adjust to its environment.



3. IQAir AirVisual Pro

Check Price at Amazon


Specifications
  • Type: Indoor / Outdoor
  • Sensor for: PM2.5 and CO2, temperature, humidity.
  • Color coded:
  • Range: 1076 sq. ft.
  • Smartphone app:
  • Warranty: N/A


This system provides you with an accurate and professional-like reading for both indoors and outdoors. It measures 7 inches by 4 inches by 3 inches and it can display, in real-time, indoor PM2.5 and CO2 readings, as well as 14 to 104 degrees Fahrenheit temperature and 0 to 95% humidity readings, thanks to its professional-grade laser sensors.

It features a smartphone app that allows you to connect with your unit, as it will provide you with all the details you need directly on your phone and a unique IFTTT System (If This, Then, That) which will make your device act based on certain parameters, sending you notifications when the normal parameters of your air had changed. Thus, you can use other HVAC devices from your home to correct the issues. It has color-coded images to allow you to quickly read the measurements, the colors ranging from green, yellow, red, and purple, allowing you to compare your indoor air with the outdoor one.

It allows you to foresee with 72 hours ahead, the level of pollution and weather forecasts, and it has a coverage area of 1076 sq. ft. It can be used outside as well, but since it’s not weatherproofed, you will have to keep it away from elements. It will even send you advice on what the most productive and cost-effective recommendations are. Moreover, it has a rechargeable Li-Ion battery with a micro USB charger for when the battery won’t last anymore and it has a power-saving mode.

PROS
  • Straightforward to use and install
  • Presents you with detailed air quality information
  • Can be used outdoors and indoors
  • Forecasts with 72 hours ahead
  • IFTTT System to allow you to act immediately

CONS
  • A bit expensive
  • The app for iPhone devices is buggy


VERDICT

It will immediately send you alerts when the air quality changes, allowing you to take action by using the corresponding HVAC unit in your house. It can be used both indoors and outdoors and will provide you with advice and tips regarding air quality improvement.



4. Temtop M2000

Check Price at Amazon


Specifications
  • Type: Indoor / Outdoor
  • Sensor for: Formaldehyde, PM2.5 and PM10, CO2 and HCHO particles, TVOC, AQI, temperature, and humidity
  • Color coded:
  • Range: N/A
  • Smartphone app:
  • Warranty: 7 days return


It measures 5.4 by 1.4 by 2.9 inches thus it is small and compact enough to be handheld, so you can take it anywhere with you. It has three types of sensors: electrochemical formaldehyde, a laser particle sensor, and a carbon dioxide base on NDIR. It can detect up to 9 air quality issues: PM2.5 and PM10, as well as CO2 and HCHO particles, can alert you about TVOC, AQI, and it can tell you the changes in temperature levels, 0-50 C, and humidity 0-90% RH.

It has a histogram function, an audio alarm, and a colorful TFT display, with color-coded information regarding the air status: green for good, yellow for moderate, orange for unhealthy for sensitive groups, red for unhealthy, blood read for very unhealthy, and brown for hazardous. Thus you can read the information you seek at a glance.

It has an internal 2200mAh rechargeable lithium battery, which makes it able to run for up to 6 hours continuously without charging. Moreover, it requires no calibration and has a return warranty of 7 days and an exchange warranty for 30 days.

PROS
  • TFT Display
  • Can detect up to 9 air pollutants
  • Color-coded
  • Sound alert
  • Can work 6 hours continuously
  • Requires no calibration

CONS
  • Short warranty period
  • Takes a long time for the temperature to stabilize


VERDICT

A great way to not only stay informed about the quality of the air you have in your house but also have it purified and cleaned. Able to function silently, you won’t notice it as it will work hard to keep your environment safe.



5. Kaiterra Laser Egg+ Chemical

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Specifications:
  • Type: Indoor
  • Sensor for: PM2.5, VOCs, temperature, humidity
  • Color coded:
  • Range: 1,000 sq. ft.
  • Smartphone app:
  • Warranty: 1 year


It might not come cheap, but the Laser Egg+ is worth every penny considering the flawless modern design and precise measurements. Moreover, it keeps track not only of air polluting factors but other aspects that affects environmental comfort, namely temperature, and humidity. Basically, you’ll know when the AC system or heater needs to be turned on to maintain thermal comfort, and you won’t be caught off-guard by the appearance of mold since you’ll know for sure when air moisture is too high and the dehumidifier must be turned on.

This indoor monitor is made all the more appealing by the fact that it works for spaces up to 1,000 square feet, so if you have a vast open space where you want to monitor conditions, like the basement, for example, if you repurposed it into a living quarter, then the Egg+ is your go-to. Since it can be connected to other services via IFTTT, you can set up some automated routines to keep conditions at their peak at all times. You can even integrate it with other home appliances via Apple HomeKit if this is the system running in your home.

When it comes to the pollutants it tracks, these comprise PM2.5 and VOCs. These comprise a multitude of pollutants, so you will be on top of the game when it comes to air purification demands – generally, a HEPA filter model should be more than enough to trap these impurities. The companion app (Kaiterra app) is the highlight of it all since it gives you alerts when air purity levels are lower than your set threshold so that you know when you must turn on the air purifier to fix the issue. It even gives you access to historical trends to analyze air quality thoroughly.

The accuracy of this monitor is granted by the performant optical sensors and cloud-based calibration. We must say a few words about what makes it run too. The battery of this model works for 8 hours without interruption on a full charge. Moreover, recharging takes only a few hours. To wrap it up, we mention that the warranty is valid for the first year after you make the purchase (repairs are free within this period).

PROS
  • Smart integration via IFTTT and Apple HomeKit
  • Accurate optical sensors ensure precise readings
  • Battery lasts for 8 hours tops on a full charge
  • Temperature and humidity display – stay on top of all crucial environmental conditions

CONS
  • Switch through screens to check each metric
  • Some reports mention that it reboots without reason fairly often


VERDICT

The modern yet simple design of the Laser Egg+ makes it an eye-catching piece that is welcomed in any household for the precision of the data it tracks. Aside from monitoring levels of PM2.5 and VOCs, it even keeps an eye on temperature and humidity so that you have a full understanding of indoor conditions.



6. Awair Element

Check Price at Amazon


Specifications:
  • Type: Indoor
  • Sensor for: Carbon dioxide, temperature, humidity, VOCs, PM2.5
  • Color coded:
  • Range: 1,000 sq. ft.
  • Smartphone app:
  • Warranty: 1 year


With a design that makes it easy on the eye and perfect even for office spaces since it looks as professional as it gets, the Awair Element is a monitor that sparks interest at a glance. On the front side, there’s a light indicator that shows whether air purity is within safe parameters or not. It shines red when air quality is poor, orange when there’s fair air quality, and green when the air is clean.

There’s even a set of LEDs matrix that shine through the panel holes to form bar graphs and numbers, indicating the tracked air conditions. There’s a scale from 1 to 5, and when there are 5 dots lighted up it shows that the specific tracked factor is unhealthy. From left to right, the factors it indicates stats for via the LED lights are temperature, humidity, CO2, VOCs, and PM2.5. Next to these bar graph-style stats, the LEDs form numbers that indicate the overall air quality score offered by the unit, the higher it is, the better.

This outstanding product is compatible with smart assistant devices like Google Assistant and Amazon Alexa. Therefore, it’s perfect for those who want to check on air quality using voice commands instead of having to enter the app or visually check the monitor every time. Speaking of apps, the one that accompanies this product might need a bit of improvement when it comes to the historical charts since there are folks who had issues understanding them, but it’s great overall. Since you even receive feedback that is based on current and past readings, you can more easily figure out where you did good or bad to make the needed tweaks and reestablish proper air purity indoors.

You even have the option to set specific goals inside the app and get feedback based on your choices. So, whether you want to sleep better, protect your health, create a better environment for the baby, or reduce allergy symptoms, the Element monitor has you covered. Best of all, it’s suited to provide air purity readings in spaces up to 1,000 square feet, significantly larger than what its competitors offer from this point of view.

PROS
  • Air quality status light lets you know at a glance whether the air indoors is clean or not
  • The app provides feedback based on current and prior air quality data
  • Receive customized feedback regarding conditions via the app
  • You can integrate it with Amazon Alexa or Google Assistant

CONS
  • It’s tricky to set up the Wi-Fi connection
  • The app user interface should be improved a bit because the historical charts are difficult to use for first-timers


VERDICT

Modern, compact, smart since you can integrate it with smart assistants, and able to track quite a few air quality and environmental factors, the Awair Element is a reliable source of information to aid you in your quest to improve air purity. It’s easy on the eyes too, which makes it all the more appealing in a modern home or office.



7. Dylos DC1100 Pro

Check Price at Amazon


Specifications:
  • Type: Indoor
  • Sensor for: Small particles from 0.5 to 2.5 microns, large particles greater than 2.5 microns
  • Color coded:
  • Range: N/A
  • Smartphone app:
  • Warranty: 90 days


This Dylos entry is basically a particle counter that provides results for two size ranges, namely particulate matter that measures from 0.5 to 2.5 microns, and PM that is larger than 2.5 microns. It uses laser particles counters that provide the rapid and precise measurement of particle concentrations in the air. Among the small particles it detects are included fine dust, mold, smog, and bacteria, while the larger particles include coarse dust, pet dander, dust mites, pollen, and larger bacteria, to name a few.

Rely on it to keep the data it tracks in its system for 30 days, which lets you compare air purity stats and see how your progress is going toward fixing lingering issues with it. There are two operating modes to pick from – Continuous (it samples the air without interruption) and Monitor (it samples the air for one minute every hour). A perk you are sure to enjoy is that it lets you view results in 3 different modes, namely:

  • View the last hour of recorded data, minute by minute;
  • View the last day of recorded data, hour by hour;
  • View the last month of recorded data, day by day.

It displays the particle counts numerically and graphically to help you better understand just how severe air pollution is at a simple glance. You can download the data it tracked on the PC so that you more easily analyze stats and take proper action to increase air purity. For this, you will need a 9-pin serial cable to link the unit to your laptop or PC.

Since it’s not weatherproof, outdoor use isn’t recommended. Instead, due to the lightweight and compact design, you won’t have trouble going with this monitor from room to room to detect pollution levels throughout your home. It measures only 7 inches by 4.5 inches by 3 inches and weighs a mere 1.6 pounds, so you can see why portability isn’t an issue. It doesn’t excel when it comes to backing though seeing how it’s only covered against defects for 90 days.

PROS
  • Use the Continuous mode to constantly monitor conditions
  • Keep separate track of pollution with both small and large particles
  • Three viewing options are available – per minute, hour, or day
  • Can store up to 30 days of data

CONS
  • Limited air quality readings as opposed to competitors
  • Doesn’t have a companion app


VERDICT

Although it might not track as many stats as the other products we reviewed, the DC1100 Pro is not to be taken lightly since it is among the most accurate products available. What impresses is that it even detects particles down to 0.5 microns, so it tracks air pollution issues that other models aren’t capable of detecting.



8. EG Air EGVOC-100

Check Price at Amazon


Specifications
  • Type: Indoor / Outdoor
  • Sensor for: Temperature, humidity, concentrations of formaldehyde, TVOC or fine particles of dust PM2.5/PM1.0/PM10.
  • Color coded:
  • Range: N/A
  • Smartphone app:
  • Warranty: 1 year


Small enough to be handheld, measuring 6.1 inches by 3.4 inches by 1.4 inches, it provides you with a portable testing unit. It has a built-in stand which allows the monitor to be placed unattended everywhere, and thanks to its two ways to keep it charged, a 2200mAH lithium battery or with a 5V micro USB charging cable, there will be no places you can’t take it with you.

It has a clear 2.8-inch 240×320 pixels color LCD which provides you with accurate readings of temperature, humidity, formaldehyde, TVOC, or fine dust – PM2.5/PM1.0/PM10. The fan it integrates quickly draws in ambient air for real-time measurements while thanks to its incorporated laser sensor it can accurately measure the dust levels. Moreover, it has color-coded information, ranging from green – good, yellow – slight, red – moderate, and purple – serious, thus alerting you when you should take action.

The second sensor is used to measure formaldehyde. It auto-calibrates in the fresh air, so you won’t have to reset it manually. So, be sure to keep it outdoors 10+ minutes before the 1st use to calibrate itself. It comes with an eBook where you can find interesting information regarding air quality hazards and their impact and with a 1-year warranty from the moment of your purchase.

PROS
  • Can measure both natural and synthetic organic compounds
  • Comes with an eBook
  • Small and portable design
  • Auto calibration

CONS
  • Poorly written use instructions
  • Some issues with accuracy after a few calibrations


VERDICT

Dependable when it comes to air quality readings, it will help you keep an eye on airborne particles and other possibly harmful substances present in the air. IT will calibrate itself as soon as you place it in clean fresh air for more than 10 minutes, so you don’t have to worry about manually resetting it.



9. Eve Room 10EAM9901

Check Price at Amazon


Specifications
  • Type: Indoor
  • Sensor for: VOCs, humidity and temperature
  • Color coded:
  • Range: Small range
  • Smartphone app:
  • Warranty: 1 year


Small and compact, it measures 2.5” in length, 2.5” in width, and 15.90” in height, and it can be used only indoors. It works with Apple HomeKit which ensures it connects with your phone, allowing you to supervise at any given moment how the quality of the air, present in your house. It shows your readings about VOCs, temperature, and humidity, allowing you to switch up the measurement layout according to your preferences.

Its operating range goes from 0C to 50C / 32F to 122F when the temperature is concerned while it detects humidity when it goes from 5% up to 95%. It works with Siri, and it features a built-in USB-rechargeable 5V battery to provide you with a hassle-free way of always keeping it up. Made from aluminum, it is sturdy, resistant, and won’t rust nor corrode with time.

PROS
  • Easy to use
  • Connects directly with your phone
  • Can track the history of the air quality
  • The battery doesn’t take long to charge

CONS
  • Can be used only indoors
  • Difficult to read the stats when there’s poor lighting


VERDICT

Small, compact, and easy to use, it will connect directly to your phone to provide you with all the necessary information and history of the air quality from your house. The battery is rechargeable, and it works with Siri so that you can ask the smart assistant about air purity.



10. ECOWITT WH0290

Check Price at Amazon


Specifications
  • Type: Indoor / Outdoor
  • Sensor for: PM2.5, temperature, weather, and relative humidity
  • Color coded:
  • Range: 300 sq. ft.
  • Smartphone app:
  • Warranty: N/A


It monitors PM2.5 concentrations, and it also has 6 grades of air quality levels indicator, based on a 24-hour PM2.5 concentration, with matching color scheme: good (green), moderate (yellow), mild (orange), unhealthy (red), severe (purple) and hazardous (brown). Furthermore, it uses a Honeywell HPM Series Particle sensor to detects dust levels, with a laser-based light scattering particle sensing for accurate information. Thus you can be sure it will precisely tell you the readings.

It measures 5 by 4.5 by 3.3 inches and it can be recharged either by replacing the 2 NI-MH batteries – they are included – or via USB cable. Additionally, it comes with a built-in solar panel as backup whenever it doesn’t have enough power. Moreover, it can measure the indoor temperature from 14 to 140 F and humidity from 1% to 99%.

It can cover a range of 300 feet inside and outside, with a frequency of 433 MHz and an update rate of 60 seconds. It can even calibrate with a weather station for more precise information regarding the weather, and relative humidity. However, it is not weatherproof, so you will have to shelter it from elements.

PROS
  • Good battery range
  • Accurate readings
  • Useful instruction manual
  • Color-coded information for easier reading
  • Replaceable batteries

CONS
  • There’s no companion app for this product
  • It is not as user-friendly as competitors


VERDICT

A quick and accurate device, it will alert you to the air quality inside and outside your room. With a large range, and color-coded readings you can easily turn your other HVAC units in your house to make your environment safe again.



11. Yvelines Air Quality Tester

Check Price at Amazon


Specifications:
  • Type: Indoor
  • Sensor for: Carbon dioxide, PM2.5, PM10, TVOC, HCHO
  • Color coded:
  • Range: N/A
  • Smartphone app:
  • Warranty: Satisfaction guarantee


Small (measures 5.83 inches by 2.76 inches by 1.18 inches) so that it sits perfectly on your nightstand or coffee table to track air quality and keep you updated with the changes and actions you need to follow through with so that you enjoy air purity, the Yvelines tester is quite a popular product. Needless to say, the cheap asking price also adds to the monitor’s appeal since a wider range of customers can afford it.

The stats that it tracks and displays include carbon dioxide, PM2.5, PM10, TVOCs, and formaldehyde. We like that all the stats are displayed simultaneously, so you don’t have to alternate between results by pushing any buttons as you do with other models.

The screen is brightly lit and it even shows a score for the environment that is color-coded, grading the purity of the air indoors so that you can more easily figure out where you’re standing from this point of view. Woefully, there’s one design issue that most people mind (and for a good reason, too) – you won’t be able to turn off the backlight of the display, so sleeping next to it might be a problem for most people.

This is a wireless model, so relocation is as easy as it comes and you don’t have any worries when it comes to placement either. For power, it relies on a 2,000 mAh polymer lithium battery that makes it capable of running uninterrupted for 8 to 12 hours. Charging it doesn’t take long either, approximately 4 hours to be precise. So, to wrap it all up, if the stats it monitors suffice and you’re looking for a product that you won’t spend a fortune on, this might just be your best option.

PROS
  • See results for all readings simultaneously
  • Monitors a range of air quality influencing factors, spanning from TVOCs to CO2
  • The polymer lithium battery works for 8 to 12 hours on a full charge
  • Accessible price – an investment for most people

CONS
  • You can’t turn off the backlight
  • Some users reported fluctuations in accuracy with time


VERDICT

With a full battery, you can count on this monitor to provide continuous tracking for up to 12 hours tops. It’s simple to use and it shows all the stats that interest you on the brightly colored display simultaneously, and the small size makes it just perfect for your nightstand (if you don’t mind the light coming from it).



12. GAIN EXPRESS CO22

Check Price at Amazon


Specifications
  • Type: Indoor
  • Sensor for: CO2, Humidity and Temperature
  • Color coded:
  • Range: Mid-range
  • Smartphone app:
  • Warranty: 3 years


It measures 7 inches in length, 5 inches in depth, and 3 inches in height, and it weighs 1.01 thus it is extremely light and compact. It comes with a wall mounting system, to allow you to place it on the wall if you don’t want to keep it on your desk. Additionally, since it doesn’t use batteries to work, it also comes with a 12V power adaptor, which can be used with 110V up to 240V outlets, to help you always keep the monitor on.

It will provide you with simultaneous aspects regarding CO2 levels, temperature, and humidity. For the CO2 levels, it uses a stable, non-dispersive infrared (NDIR) sensor, which has a range between 0 up to 2000 ppm. The temperature sensor allows you to select the degrees in either Celsius or Fahrenheit, depending on your preferences, and it has a range that goes from -10.0 ° C up to 60.0 °C, and from 14 °F up to 140 °F respectively. When humidity levels are involved, it has a range that goes from 0.0 up to 99.9%, thus you’ll always be able to tell how humid the air in your room is.

It needs 30 seconds to warm up, and a short-term exposure limit of 15 minutes to get accommodated to the environment, to provide you with readings. Moreover, it has a built-in relay that will be able to access and control the ventilation system in your house, to always maintain the CO2 level that you set or specified. Even more, it will alert you when it will do so, thus you don’t have to keep an eye on it at all times. It has a baseline calibration, which won’t require you to move it or change its position, as well as manual calibration, to provide you with the option of taking care of it if you want to.

Furthermore, thanks to its large triple-function LCD, you will be able to easily read the digital numbers, while it will provide you with continuous monitoring. It can transmit the data acquired to your computer, so you’ll be able to create your history of air reading and use the necessary appliances to rectify any possible anomalies in the parameters.

PROS
  • Easy to read display
  • Triple simultaneous readings
  • Can be connected to a computer
  • Can be wall mounted
  • Continuous monitoring

CONS
  • It gives false readings in regards to humidity levels at times
  • Requires recalibration every few days


VERDICT

Thanks to its large LCD, you’ll be able to read the levels even from across the room, and it requires no manual calibration as it will automatically do so. You can easily transfer the data to a computer, so you’ll be able to monitor the air quality easier, and it can be mounted on the wall or placed on the desk, according to your preferences.



Sensors and Pollutants


The air you have in your home or house might be even worse than the one outside if you’re not careful. While for the majority bad air ratings might only be a bit uncomfortable for the majority of people, leading to possible coughing fits that pass as soon as you open a window, for those who suffer from allergies or asthma it might be the difference between life and another fit. The ‘bad air’ appears when you cook – as the process involves steam and smoke when you paint or do DIY jobs, or, it can even come from closed windows and doors. Furniture, as well as other several building materials, might have certain volatile chemicals that are let free in the air, while even the process of breathing will set lose CO2.

If you’re wondering what you can do to prevent such poor air quality ratings, firstly, you have to be aware of them. An air quality monitor can help you become aware of your environment and of possible aspects that, if left unsupervised, might lead, in the future to health issues. There are two types of sensors already on the market: metal oxide electrochemical (MOS) and light scattering sensors.

While the first category will provide you with an inexpensive, widely available sensor, it is not specific to one element and its readings can be quickly influenced by other external factors, thus making its reliability questionable. The light scattering ones, however, provide you with a versatile gadget that can provide you with highly accurate readings. Varying in shapes and sizes, they can measure different types of particles, offering you instant readings, thus providing you with a sure way to detect certain levels of pollutants and their source.

How light-scattering sensors work

They have a light source, which often comes from a laser, which sends a ray of light into the environment. As soon as the light touches a dust particle, it shatters away, the process repeating itself for all dust particles it finds in its range. Some sensors are able to receive readings every second, or every minute, but others can be customized to their user’s needs. You might think that fewer updates mean a report lacking in quality, but it’s the contrary. If the laser doesn’t get readings as often, it will require less calibration, thus giving you fewer chances of inaccurate readings.

The typical pollutants

What you should pay attention to, especially if you want to have clear air are the following, common pollutants:

  • Ozone – formed from sunlight and pressure of other ley pollutants
  • Carbon monoxide, nitrogen dioxide, carbon dioxide, and sulfur dioxide – fuel combustion and mobile sources
  • Volatile organic compounds (VOCs) – fuel combustion, gasoline, evaporation and solvents
  • (Fine) particulate matter(PM2.5/PM10) – fuel, dust, agriculture, fires
  • Black carbon (BC) – biomass burning, diesel engines
Sensor Important Features
  • Weather – if you plan on purchasing a sensor that measures the outside environment as well, be sure to pick one that is designed to do so. Moreover, keep in mind that most of them are not weatherproof, so you will have to place them somewhere safe, away from the elements.
  • Battery life – depending on your choice, it has different ranges
  • Orientation – some units require specific orientation for them to accurately read
  • Data storage – some may come with the ability to connect to WiFi, phones, and tablets via apps, thus creating a data history for you to be able to see the changes
  • Sensitivity levels – if they can accurately measure ambient levels
  • Interferences – some may respond to ‘other’ pollutants and the readings might be influenced, thus not accurate.

When you plan on investing in a sensor, you should pay attention to how often you plan on using it and for what, how repeatable is the measurement, what detection limit or range it has, how long it will take to measure and how accurate and reliable it is. To simply put it, depending on what type of sensor and monitor you are looking for, for education and information, for hotspot identification, for supplemental monitoring, or for personal use, there are several options to choose from. Simply pick one that fits your needs best.


Frequently Asked Questions



Do air quality monitors work?
The answer depends on the specific model in the discussion. Any of the products presented here do indeed give accurate readings in regards to air quality, and many other monitors are reliable from this point of view. However, don’t expect a consumer-grade air quality monitor to provide the same quality results that a laboratory detector does, these specialty products being significantly more accurate.

Is air quality better in the morning or evening?
You will find a lot of sources that suggest a specific time of the day as being the best when it comes to outdoor air quality. These sources generally highlight morning or nighttime as the best period of the day in terms of air purity. However, studies that cover different cities and areas show that air pollution levels aren’t at their lowest everywhere at the same time. So, while in your city air quality might be at its best in the morning, the same won’t apply to other regions where it might peak in the afternoon, evening, or night. The only way to sort this out for sure is to either check daily reports regarding air quality in your area and compare results over a few days, or use an air quality monitor to track these stats yourself.

What are the symptoms of bad air quality in the home?
With time, issues with poor air quality indoors will inevitably lead to a series of unwanted symptoms and even health problems for the individuals living in these unsafe environments. Some of the symptoms and problems include:

  • Asthma symptoms: If you or another member of your household suffer from this health issue, bad air quality can really take a toll since it triggers the symptoms that are specific for it – chest tightness, coughing, wheezing, and difficult breathing. If you don’t take action regarding fixing air quality, the symptoms can worsen and lead to an asthma attack.
  • Common cold symptoms: When indoor air pollution is high, you will likely start to feel just as bad as you do when you have a cold since the symptoms are quite similar. Some of them include fatigue, dizziness, itchy eyes, sneezing, coughing, and a runny nose. Generally, exposure to pollutants like pollen, viruses, mites, dust, and pollen is what leads to these flu-like symptoms.
  • COPD: This is a common long-term condition that comes as an inevitable result of air pollutant inhalation over prolonged periods. Chronic obstructive pulmonary disease is similar to asthma in the sense that it has a few common symptoms, namely shortness of breath, chest tightness, and wheezing. However, there are some unpleasant traits of its own that it sports, specifically fatigue, respiratory infections, sudden weight loss, chronic coughing, and swelling of the feet and legs. Beware that if you already suffer from COPD there are some pollutants that you should make sure don’t linger in the air indoors because they will worsen your condition, namely mites, radon, tobacco smoke, pollen, and asbestos.
  • Cardiovascular disease: Some pollutants can cause the blood vessels to clot and thus lead to cardiovascular system issues and diseases. These impurities include sulfur dioxide, dust, ozone, carbon monoxide, and nitrogen dioxide.
  • Lung cancer: Hands down, the most tragic of all issues related to poor air quality exposure is lung cancer risk increase. VOCs, secondhand smoke, and radon are the pollutants that bring the highest contribution in this direction, so you’d better install air purifiers that tackle eliminating the pollutants ASAP if the monitor’s readings show worrying levels of either contaminant.


What are the major indoor air pollutants?
While the list is long and can contain or lack certain polluting particles depending on the specific area you live in, your habits, and more, there are a few indoor air pollutants that are prevalent and have a huge negative impact on life quality, namely:

  • Radon;
  • Asbestos;
  • Pesticides;
  • Indoor particulate matter;
  • Environmental tobacco smoke;
  • Lead;
  • VOCs;
  • Nitrogen dioxide;
  • Formaldehyde;
  • Carbon monoxide.


How do you fix bad air quality in your home?
While it’s almost impossible to ensure 100% clean air inside at all times, there are things that you can do to fix the issue of poor air quality as much as possible. These tested and proven methods include:

  • Vacuum all the areas with rugs and carpets at least twice per week since they harbor dust and pet dander;
  • Regularly clean items that attract allergens, like bedding and drapes;
  • If it’s possible, keep all the plants outdoors since they can foster mold in the humid soil;
  • Don’t leave any clutter behind – cleat it because it is perfect for trapping and holding dust;
  • Install an air purifier, preferably one with a HEPA filter – this unit is specialized in eliminating airborne particles, and model with HEPA media have the highest efficiency in terms of trapping small-size pollutants from the air;
  • Leave the windows open for at least 30 minutes per day for proper air circulation, even during the cold months of the year;
  • Change the filters of your forced-air heating system regularly to prevent the pollutants trapped by them from being recirculated throughout your home.


What are the health effects of bad air quality?
We will classify these health effects in two categories, depending on the exposure length you have undergone. First, we have the immediate effects of poor air quality that include, among others, damaged respiratory system cells, the heart and lungs will have to work harder to provide proper oxygen supply to the body, and aggravated respiratory and cardio illnesses. On the other hand, we have long-term exposure effects that include health issues like decreased lung function, asthma, emphysema, cancer, shorter lifespan, lung capacity loss.

What does VOC include?
VOCs include compounds with low water solubility and high vapor pressure. They are emitted by a wide range of products, thousands actually, and some of these include craft materials, furnishings, pesticides, cleaning supplies, paint strippers, paints, lacquers, and building materials.

Is it safe to exercise indoors when outdoor air quality is bad?
If air quality outdoors is at worryingly low levels, you ought to avoid exercising outside your home or an enclosed space like the gym, for example. Ideally, you should tailor a workout routine to the environment in your home, the equipment, and the space that you have available. While you exercise, keep the windows closed so that the polluted air won’t make its way inside, and keep the fan on for it to circulate the air.

Where is the cleanest air on Earth?
The region with the cleanest air on the planet is Puerto Rico, one of the most beautiful destinations for tourism as well. When it comes to cities, Hamburg (Germany) scores the highest.



Conclusion

Keeping an eye on your home environment is essential if you want to be able to lead a healthy life. To be able to track the nocive elements from the air present in your house, you require a reliable air quality monitor. While all the above-mentioned units can keep you updated on how the property of the air changes, some are better in some areas:

Best Air Quality Monitor for Sale: uHoo 9-in-1 Indoor Air Quality Sensor

If you really want to create an environment that is safe to breathe in, an air purifier won’t suffice – you’ll need the assistance of the uHoo too. This 9-in-1 monitor tracks a variety of stats to keep you on top of the air purity game, namely: carbon monoxide, CO2, PM2.5, air pressure, TVOCs, temperature, humidity, ozone, and nitrogen dioxide. Just plug it in, connect to the Wi-Fi network, and you will receive immediate feedback over the app regarding indoor conditions. Speaking of, you receive alerts, tips, and insights over the app, all with the end goal to provide the needed assistance to make a difference for the better when it comes to environmental conditions.

Editor’s Choice: IQAir AirVisual Pro

With data storage capabilities to parallel trends when it comes to air quality, smart home integration so that you receive alerts when air quality changes and action is needed ASAP on your part and a user-friendly app that helps with analysis, it’s a product that was bound to catch our eye. Moreover, it’s suited for indoor and outdoor monitoring, a feat that few monitors can brag with. This means that you can count on it to see how pollution levels are fluctuating outside too. Thus, you can set up a schedule for running and other activities when the air is pure and there’s nothing harmful impacting your health.

Best Air Quality Monitor for Allergies: Dylos DC1100 Pro

Particulate matter is one of the main culprits for allergy symptoms going haywire. If you suffer from allergies too, consider the DC1100 Pro since this is the monitor that focuses all of its effort on particulate matter detection. It might be a hefty investment, but it makes a big difference since it shows you exactly how severe PM0.5 and PM2.5 pollution is. This means that you are kept aware of when action is necessary in regards to the air purifier’s functioning to keep the indoor environment healthy and safe.

Best Air Quality Monitor for Office: Awair Element

Since it is suited for spaces up to 1,000 square feet, and it is designed in a modern manner that makes it seamlessly integrate with any space, the Element monitor is a preferred option for offices. The air quality and environmental conditions factors it keeps track of include carbon dioxide, particulate matter 2.5, VOCs, temperature, and humidity. If you’re in the middle of a call or conference and you want to quickly check on air quality, you just look at the monitor and the colored LED indicator lets you know on the spot where you stand (green for good, orange for fair, and red for poor). Best of all, there’s a free companion app that you can install on your phone and that stores readings for air quality analysis over prolonged periods.

Best Air Quality Monitor for the Money: Kaiterra Laser Egg+ Chemical

What makes this modern gadget the best when it comes to value is the reasonable asking price combined with accurate monitoring. You can count on it to keep track of indoor pollution with PM2.5 and VOCs, and it also shows the temperature and humidity to keep you aware of environmental comfort conditions too. If you install the Kaiterra app on your phone, you’ll benefit from even more perks since you will receive alerts if air purity exceeds your preset thresholds.

Markus Mackay
Markus Mackay
Our resident expert in all things AC-related, Markus is a never-ending source of knowledge regarding how these systems work. What makes him so savvy in this field is his direct experience that he acquired while working in sales. The connections he made during that period also came in handy here as Markus knows a lot of experts in this field. With each article uploaded, he makes sure to gather the expertise of his more experienced ex-peers as well, making sure to provide readers with reliable reviews and articles.

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