Recent searches
Search options
Hello Fedi,
Do you know anything about *indoors air quality measurement*? 
A few questions here:
- is the "Air Gradient One" truly one of the most exhaustive + affordable option (respectful of people's computing freedom? https://www.airgradient.com/indoor/ Or is there something better?
- is that precise enough that you could move in a space and identify sources of particles? (stashes of devices, windows, carpets, etc?)
- how about mold? is there any DIY solution for those?
@jz Same questions 
@jz Hi :) I have a couple of AG Ones, and while any product that comes with a built-in prometheus /metrics endpoint gets my approval pretty quick, I have to say I am very happy with them.
Brought one to congress to show the astoundingly high co2 levels in hall H (pic day2 ~18 CET).
The co2 sensor is sensitive enough that I can tell if the cat is in the room with me.
The pm2.5 sensor is also extremely sensitive
Moving the device to identify the source might be fiddly. Air tends to mix a lot.
@jz if you have a rad1o it can do air quality measurements, i can provide you with an app, that dumps this on the serial port over usb, but i'm sure it's easy to also show it on the display.
@stf nice, but what type of sensors? (i could RTFM this...)
As you can see on https://www.airgradient.com/shop/#!/AirGradient-ONE-Indoor-Monitor-Pre-Soldered-Kit-Version-9/p/594725501/category=155176011
the AirGradient One has a
Sensirion SGP41 TVOC/NOx Sensor, a Plantower PMS5003 PM sensor, etc. ... and those are a bit pricey, and chunky. I am pretty sure i would have noticed similar beasts on the Rad10.
If by "air quality" we mean just CO2 and humidity, yeah there are tons of cheap things for that.
I am wondering about thin particles and specific pollutants, and also molds...
@jz ah, sorry, yeah dust measurements are not included on the rad1o, for that we have additional https://sensor.community/en/sensors/ devices, but for mold? i have no idea. specific particles and gases to measure is also very expensive in my experience.
@jz i've been told for mold there is a probability indicator, from 55% humidity with very low chances of mold to 80% humidity with very high chances of mold. this one is easy to measure, but should be long-term. however if you do suspect mold, then you place a petri dish for 24 hours into the open air of the space to be tested, and using a microscope you look at what develops. but my expert says, if you are more specific, she can give you much better advice probably...