Here are all the available IAQ Monitors on the market 2019 Q4. There are so many devices out there but they all lack innovation and they all offer exactly the same technologies. Companies had better hear users feedback!
- Prices may vary during time.
- Some Companies don’t specify on their data sheet if their devices are capable to measure PM2.5 or PM10 and they just mention the word dust.
- Some other companies say: Our product goes beyond CO₂ by analyzing substances that directly affect your well-being by measuring VOCs. They aren’t clear if their devices have CO₂ sensor.
- Some of the devices are IAQ Monitors and Air Purifiers Combo. On this list you can only read the features as an IAQ monitor.
See The Air 
Invaluable consumer information, many thanks.
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In the spreadsheet you have WP3690S. Is this a typo for the WP6930S that is on Amazon? Specs look the same.
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Hi Paul, WP6930s is the correct model number. Thats for spotting it out. I will fix it.
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Ok, cool. I’m new to air quality and I’ve been testing that unit. You have reviewed the PM2.5 and HCHO sensor readings from it but not TVOC. I took a variety of readings and found you can calculate the TVOC reading from the HCHO implying they are not separate sensors, is that normal? Here’s the formula which works on your screenshots also: TVOC = -0.00991 + 4.37716 * HCHO + 1.63941 * HCHO ^ 3
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In my device they are two separate sensors but in another device that a friend has there is only one sensor for both pollutants. So your formula may actually be real. Thanks Paul.
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airbeam2 is a great pm2.5/pm10 monitor for indoor/outdoor/mobile(used while driving) sensing at $250 and it competes with high grade equipment, here’s an epa study. I use it in Jakarta and it works.
https://www.epa.gov/air-sensor-toolbox/evaluation-emerging-air-sensor-performance
https://www.habitatmap.org/
https://www.habitatmap.org/airbeam/buy-it-now
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Thank you Andrew
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