More and new devices on the market. From wearables to home AQI monitors are here to assist people’s needs. Remember air pollution is everywhere.
- 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 AQI Monitors and Air Purifiers Combo. On this list you can only read the features as an AQI monitor.
- The classification of the design between Bad, Good and Very Good is based on the materials (plastic, wood, glass and metal) that they use and the aesthetic on my personal opinion.
See The Air 
I wonder if someday you could include the type of sensor that is used. The technology behind the sensor (metal oxide, electrochemical, particle sensor…) would be an interesting category to help our understanding of these devices. You have touched on this in your comments and I agree that some devices may not clearly state what sensors they are using.
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Yes, but unfortunately sometimes manufacturers don’t want to reveal them. I have tried in the past by asking them.
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Thanks for including Speck! A couple minor corrections for Speck:
* We offer 2 models, one with a humidity sensor ($199), and one without ($149). Your chart says “No” for humidity, which is fine if that’s the model you tested, but then the price should be listed as $149 and not $200. Alternatively, change “Humidity” to “Yes” and list the price as $199.
* If by “Map/Share” you mean some sort of map showing all (public) Specks, then it should be listed as “Yes”. Our public data map is here: https://www.specksensor.com/public-data
Finally, in response to Cheryl’s question about sensor used, we provide full tech specs here: https://www.specksensor.com/support/tech-specs
thanks!
Chris Bartley
Principal Research Programmer
Airviz / CMU CREATE Lab
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Hello Chris, thank you for the feedback and the links. Very useful.
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Hello,
first of all, thanks for your work.
In my case all comes down to accuracy. By accuracy I don’t mean the exact absolute number of particles or CO2, but at least an high correlation with the real data ( the values can be higher or lower but the error remains constant and with same trend of real data ). The drift of the sensors over time is also a concern for me.
¿What’s the point if they don’t measure the real data?
In the end the only way to be sure about this is to buy another reliable particle meter like Dylos and compare values… If you could measure the accuracy somewhat it could be awesome.
For example Laser Egg and AirVisual were tested by smartair and they were very accurate.
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Hi Asier, thank you for your message. Indeed accuracy is important and durability as well. AirVisual has a great CO2 sensor I use it myself and I have compared it with others too. Now about PM sensors, they are vulnerable to dust and they are hard to maintain. You have mentioned Dylos. It isn’t the best and it isn’t the most accurate device. Although the company has been on the market for quite some time now but they haven’t update their product recently. Some companies have used cheap PM sensors but believe me they have learnt their lesson.
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I’m not an expert by any means, but you can check this blog entry regarding to dylos accuracy:
https://smartairfilters.com/en/blog/accurate-1-micron-dylos-official-pm2-5-comparison-test/
Another tests were performed here:
https://smartairfilters.com/en/blog/how-accurate-are-common-particle-counters-comparison-test/
For me it’s hard to pick a winner by just usability/features because I don’t know if it’s going to be accurate or not. But thanks for your efforts comparing all of them.
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I forgot, but you can check this study of EPA:
https://cfpub.epa.gov/si/si_public_file_download.cfm?p_download_id=521154
where the dylos is compared against a lot more costly solutions doing pretty well.
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Check this site http://www.aqmd.gov/aq-spec/evaluations/summary
Some new devices are coming with a correlation higher that R2>.90
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Oh thanks!
It seems that Air Purple and AirBeam and doing pretty nice!
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Thanks for this very useful chart! If you get a chance, it would be nice to see which ones have an API.
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Speck has an API. We don’t actively publish it yet, but it’s not secret, either. Happy to share details if interested.
Chris Bartley
Principal Research Programmer
Airviz / CMU CREATE Lab
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A new list is out 2017Q4. API is included now
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Thank you!
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Thank you for the great information. It helped a lot with my final decision to purchase the Awair.
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