Air Quality Monitors – Comparison List 2022 Q2

The famous list with all the available indoor air quality monitors is finally updated. In this version there are two tabs. Air quality monitors for consumers (B2C) and for businesses (B2B). As always, I stay away from knockoffs and cheap products. An air quality monitor needs to function properly for 5 to 10 years depending the sensors − gas sensors tend to have a shorter lifespan.

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OPEN Ambient Air Quality DATA

There is some serious competition in the market of environmental monitoring and particularly in air quality. There are a lot of ambient air quality monitors available with great features and great sensors, the problem is that society doesn’t benefit from the variability of monitors because AQ data are scattered in different platforms/maps. It is hard for end-users and citizens to find which monitor is active and where (especially if you move). Someone needs to gather low-cost AQ data from everywhere and offer it to users in easy service.

Last year, on my trip across Europe, I monitored air quality with a portable monitor, but I wanted to compare the data I got against the official or other low-cost monitors out there. It was impossible!

The openaq team is doing just that. They are gathering data from official and low-cost sensors (stationary and mobile). Unfortunately, even today I cannot access data from specific low-cost monitors that take advantage of the API and their open map.

This are the brands that collaborate and they provide data to openaq:

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Review: View Plus by Airthings

View Plus is the flagship air quality monitor from Airthings which was designed to address as many indoor parameters as possible and it complies with Green Building Certification.

The philosophy behind Airthings air quality monitors is simple. They try to make B2C and B2B clients’ life easy. One clear example is that all monitors, including the View Plus, work on simple AA batteries in order to avoid installation fees (from construction workers) and ugly cables running all over the walls.

Specifications

  • Particulate Matter (PM2.5) Laser OPC Sensor 0-500 μg/m3
  • Carbon Dioxide (CO2) NDIR Sensor 400–5000 ppm
  • Volatile Organic Compound (VOCs) Metal-oxide Sensor 0-10000 ppb
  • Temperature Sensor
  • Humidity Sensor
  • Air Pressure Sensor 500-1100 mBar
  • Light Sensor
  • Hand Gesture Sensor
  • Noise Sensor 35 – 120 dBA SPL
  • E-Ink 2.9″
  • RGB LED Indicator
  • 6 AA batteries or USB-C
  • Mesh SmartLink and Bluetooth LE
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Spring Is Around the Corner & Allergies too

I love spring as it marks the return of warm weather, outdoor activities, the blossom of flowers, and life in general. However, pollen becomes abundant everywhere there are plants and trees, as a result, the flare of allergy-related health issues too. I am allergic to some kind of pollen and although I can manage it without medication, some people are suffering to a greater extend and they need better ways to mitigate pollen out of their immediate environment.

Unfortunately, on earth, there are only a few special Air Quality monitors that can measure and classify pollen. Satellites also track the progress of pollen but do you know where to find this kind of information? I bet no, for this reason, I will tell you in a bit.

Remember, the first step is always quantifying the pollutants/allergens (pollen in this case) before mitigating them from indoor spaces. The reason is simple, once we have the proper information, we can take better decisions. For example, should I exercise outdoors today or go outside for some errands or is this the right moment to ventilate my house?

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Review: Senstate Urban Air Quality Station

I was given the chance to review an air quality monitor from a European company that is located in one of the most contaminated countries with the highest concentrations of particulate matter − the notorious pollutant which causes premature deaths and many illnesses.

Each year during the cold winter months, Bulgaria has the highest PM2.5 concentrations of all EU-28 member states in urban areas (I have the chance to experience it in person in Sofia). The reason is wood and coal burning. Senstate Technologies SC is a Bulgarian company with experience in the field of environmental issues.

The Senstate Urban Air Quality Station is a versatile and configurable air quality monitor with cutting-edge technologies on board, I will give you more information about it in a hot minute.

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Office Study – Tapping Into The Real World Air Quality Data

Nowadays, it is a privilege to have access to a real indoor environment where you can measure and quantify indoor environmental quality (IEQ). It is not an easy task because most companies keep AQ data private, and we totally respect that. However, sometimes tapping into the real world data is fundamental in order to understand the conditions white color employees and employers work in an effort to improve work conditions and productivity.

The owner of the building and the office granted me access to installing the Atmocube IAQ monitor for two months, in order to figure out what improvements shall apply in their effort to mitigate covid19, improve working conditions and boost productivity. The office is located in Almeria, Spain which is a coastal city.

They don’t have any mechanical ventilation systems, so the indoor conditions were subject to their human actions and whether they opened the windows/doors or not.

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CO2 Trio Side by Side: Single Beam NDIR vs Dual Beam NDIR vs Photoacoustic

So many different types of sensors have become available in the market. For years we have seen and used Single (mainly) and Dual-Beam NDIR sensors for CO2 detection, but now another technology has surfaced, the Photoacoustic.

I decided to do a quick comparison of the different technologies in order to determine which one is the best and what are the differences if there is one. Price always affects the Bill of Material BOM, so we need to make a wise choice depending on the application of the sensor (commercial, real estate, industrial, scientific, etc).

Single and Dual Beam NDIR

CO2 is a gas with an asymmetric molecular structure that has strong absorption of infrared. This is the reason we use a Non-Dispersive Infrared NDIR sensor which is based on tunable diode laser spectroscopy.

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Review: SODAQ AIR – An Air Quality Monitor for Your Bike/Your Lungs

More and more people choose to ride a bike for their daily commutes and although SODAQ AIR is not the first air quality monitor for a bike, it is the first to have collected over 20M data points. This is particularly import for the development of an IoT air quality monitor as the developers have enough information to debug and develop a super stable product that needs very little troubleshooting from its users.

SODAQ is not a new company as it was founded back in 2013, and they have been working on this particular project (SODAQ AIR) alone since 2015. It seems that consumer satisfaction is always their priority, which is very important nowadays as we need sustainable products that will last for a long time.

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High-End Professional vs Low-Cost Professional Ambient Air Quality Monitors

In the space of ambient air quality monitoring, there are two basic and distinctive categories of professional air quality monitors; the High-End Professional and Low-Cost Professional monitors. I have been asked multiple times to recommend monitors for scientific studies and the deployment of them in cities.

It is very important to understand the strengths and weaknesses of both categories. It is also mandatory to recognize the fact that we will never get the exact same measurement from either category of sensors.

High-End Professional AQA

High-End Professional ambient air quality analyzers are used mostly by governments inside the air quality stations we have in most cities. Their strength is that they meet international standards for accuracy and they are certified by the EU (and similar bodies) to meet minimum performance requirements, in order to ensure that the measurement methods comply with the Data Quality Objectives set down in the Ambient Air Quality Directive (2008/50/EC) and in the amending Directive (EU) 2015/1480. Their weakness is that they require lots of energy to operate. In most cases, they are inside a fixed container with a refrigeration system to keep conditions stable. They are big and boxy in size and very expensive to purchase and operate. Additionally, they need constant maintenance by a technician. Another weakness is that in most cases these analyzers are not smart enough to broadcast measurement in real-time to the Cloud and they require other pieces of equipment to do that job, as a result, the cost of operation increases.

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Review: AIRINUM URABN AIR MASK 2.0

Last year, I reviewed the AIRINUM Lite Air Mask and I was really pleased with the comfortability and efficiency during my daily commutes. The same company has developed a higher-end model called URABN AIR MASK 2.0. In my opinion, this mask has been given much more attention to the details. From the packaging to the mask itself.

The AIRINUM URABN AIR MASK 2.0 offers great protection from particulate matter. I have been wearing the Onyx Black for four weeks already.

Filtration

It employs the same technology as the Lite Air Mask with a multi-layer filter which is tested at the Research Institutes of Sweden (RISE) with results showing 98% filtering efficiency against particles down to 0.3μm in size. The size of the filter is bigger though. You will find the full lab results here. The five-layer filter can last up to a month of usage, but as always keep it away from very humid environments and procure to disinfect the inner filter layer with sprayed alcohol to prevent bacteria growth. The mask is washable and treated with Polygiene®.

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