Air Quality Sensors
Users recommend and discuss indoor air quality monitors, focusing on CO2, PM2.5 sensors, and devices like Qingping, Airthings, AirGradient, including commercial options, DIY kits, and accuracy comparisons.
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My Qingping Monitor Lite with SenseAir S8 co2 sensor, pm2.5, wifi, and oled display seems to be accurate enough and was only $45.
I like the IQ air sensors https://www.iqair.com/us/air-quality-monitors/airvisual-pro
What air quality sensor are you using?
+1 for the air quality sensors question. I only found 1 for CO2 levels, and it is not connected. And even that one costed $120.
What PM2.5 Sensor are you using? I'm about to start a build to monitor indoor AQI/CO2.
How about the Qingping Air Quality Monitor on amazon. I have one and it does all of that.
I use the Airthings (the $300 one). It detects more than just CO2, has an e-ink display, and has a decent app.
The author seems to be using the uHoo in home monitor, which is what I have myself. They’re pricey but I’ve been happy with mine for 2 years.uHoo Smart Air Quality Sensor – 9 in 1 Indoor Air Monitor with Temperature and Humidity Gauge, CO2, Dust (PM2.5), VOC, NO2, Allergen Meter -to Breathe Easy and Boost Health with App https://www.amazon.com/dp&
fyi related info: https://www.jeffgeerling.com/blog/2021/airgradient-diy-air-q...
I've been very happy with my AirGradient [1]. It measures PM2.5, CO2, temperature, and humidity. I got the $67 kit and assembled it; it was a fun soldering project. I like that I can reflash it and get it to send data to VictoriaMetrics on my Raspberry Pi over WiFi. The biggest thing that I dislike is that the CO2 sensor loses calibration over time and (from what I understand) needs to be re-exposed to fresh outdoor air every ~2 weeks.I might buy this IKEA sensor too to see how they comp