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forum threadslickception posted Dec 01, 2025 03:05 AM
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forum threadslickception posted Dec 01, 2025 03:05 AM

CIS 7-in-1 Air Quality Monitor $27 @ Amazon

$27

$45

40% off
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Amazon has CIS 7-in-1 Air Quality Monitor for $26.91. Shipping is free w/ Prime or on $35+.

CIS 7-in-1 Air Quality Monitor, Indoor Humidity Monitor, Temperature, CO2, TVOC, HCHO, Time, Date Display

https://www.amazon.com/dp/B0CWS5317P
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Amazon has CIS 7-in-1 Air Quality Monitor for $26.91. Shipping is free w/ Prime or on $35+.

CIS 7-in-1 Air Quality Monitor, Indoor Humidity Monitor, Temperature, CO2, TVOC, HCHO, Time, Date Display

https://www.amazon.com/dp/B0CWS5317P

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Model: CIS 7-in-1 Air Quality Monitor, Indoor Humidity Monitor, Temperature, CO2, TVOC, HCHO, Time, Date Display Desktop Air Quality Tester, Air Quality Meters for Home Office Hotel Restaurant School

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Dec 01, 2025 06:17 AM
306 Posts
Joined Oct 2015
medgomelDec 01, 2025 06:17 AM
306 Posts
Got it a few days ago from Amazon Resale for $17. It is going back. Had absolutely wrong sensor data on CO2, temperature and humidity. IDK, if my specific unit was a lemon.
1
Dec 01, 2025 08:33 PM
100 Posts
Joined Feb 2012
Ross1987Dec 01, 2025 08:33 PM
100 Posts
Quote from medgomel :
Got it a few days ago from Amazon Resale for $17. It is going back. Had absolutely wrong sensor data on CO2, temperature and humidity. IDK, if my specific unit was a lemon.
The design of these (and all consumer VOC/CO2 measurement devices) is fundamentally flawed and there's not really an affordable way to do some of these measurements "correctly".
Dec 01, 2025 09:16 PM
306 Posts
Joined Oct 2015
medgomelDec 01, 2025 09:16 PM
306 Posts
Quote from Ross1987 :
The design of these (and all consumer VOC/CO2 measurement devices) is fundamentally flawed and there's not really an affordable way to do some of these measurements "correctly".
You are absolutely right
Pro
Dec 04, 2025 03:36 PM
632 Posts
Joined Sep 2020
q99
Pro
Dec 04, 2025 03:36 PM
632 Posts
It is called an "air quality monitor", but it doesn't appear to measure AQI (air quality index)? I don't see any measurements of ozone (automobile smog) or particulate matter (smoke and industrial air pollution).
1
Dec 05, 2025 04:15 PM
659 Posts
Joined Nov 2012
glenatufDec 05, 2025 04:15 PM
659 Posts
I'd love a cheap co2 meter. But by the sound of it , this ain't it

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