ahaucnx

24 ms·

1. 241.▲
   by ahaucnx 3y ago

   I am curious, how do you do real-time calibration in the cloud?
2. 242.▲
   by ahaucnx 3y ago

   Yes it works good.
3. 243.▲
   by ahaucnx 3y ago

   Comparable products are typically 3x or more the price. A lot of costs are not BOM related, e.g. costs for tooling (e.g. plastic mold), certifications, testing & calibration etc.
4. 244.▲
   by ahaucnx 3y ago

   We currently don't do any paid advertising at all. But good point, we will look into this and it's definitely something we can improve.
5. 245.▲
   by ahaucnx 3y ago

   We currently sell only out of Thailand but most of our customers in the EU and the US do not get charged any custom fees.
6. 246.▲
   by ahaucnx 3y ago

   Thanks for the feedback. We are working on making the onboarding easier and also improve the UI in general. Please get in touch with us if you have more feedback (you can use the support form on our website).
7. 247.▲
   by ahaucnx 3y ago

   We are currently integrating our data with openAQ [1] and then people can opt in to share data with openAQ and many map applications use that data. [1] https://openaq.org/
8. 248.▲
   by ahaucnx 3y ago

   Without display and any kind of connectivity, how do you know the air quality data then?
9. 249.▲
   by ahaucnx 3y ago

   Thank you for sharing this. Are you using the AlphaSense OPC?
10. 250.▲
    by ahaucnx 3y ago

    We use the Plantower PMS5003 sensor for PM2.5. This sensor has been extensively tested and is one of the most accurate low cost sensors. All low cost sensors are using the laser scattering technique and thus do approximate the mass and not
11. 251.▲
    by ahaucnx 3y ago

    Achim from AirGradient here. Nice to see my blog post getting some attention. I think the underlying picture here really is that I and my co-founder are both heavily affected by air pollution in Northern Thailand and are seeing how it affec
12. 252.▲
    by ahaucnx 3y ago

    Achim from AirGradient here. The open source nature of our air quality monitor kits give you a number of choices for data transfer. You can use the monitor and send the data directly to your end point, e.g. through ESPHome or just change ou
13. 253.▲
    by ahaucnx 3y ago

    Yes I agree. The SenseAir S8 is probably the best of the three. The SCD41 gives similar values indoors but at lower concentrations outdoors it seems to become less accurate. The MH-Z-19 is also pretty good but I think the S8 has a better bu
14. 254.▲
    by ahaucnx 3y ago

    Achim from AirGradient. Please contact our support. We will make it available soon.
15. 255.▲
    The hidden cost of air quality monitoring(airgradient.com)

    606 points by ahaucnx 3y ago|299 comments
16. 256.▲
    by ahaucnx 3y ago

    We do use the ESP-32-C3-MINI module in our open source / open hardware air quality monitor [1]. We used the ESP8266 before and the C3 is a great replacement and big improvement. The direct programming through the USB works great and ou
17. 257.▲
    by ahaucnx 3y ago

    We maintain popular open source air quality monitor projects. You can source the components yourself or get a kit from us [1]. The indoor kits include a high quality NDIR CO2 Sensor from senseair. [1] https://www.airgradient.com&
18. 258.▲
    by ahaucnx 3y ago

    Outdoors we see quite different lifetimes with the Plantower. Sometimes insects are getting into it and reduce the lifetime. No experience with pollen.
19. 259.▲
    by ahaucnx 3y ago

    Fixed
20. 260.▲
    by ahaucnx 3y ago

    Thanks for spotting this. I will change it later today.
21. 261.▲
    by ahaucnx 3y ago

    We use CC BY-SA 4.0, see for example here [1] which is open-source 'compatible'. We used -for a short time NC- but not anymore. Where did you see the NC license? Maybe we forgot to update it somewhere? We also wrote a blog post ab
22. 262.▲
    by ahaucnx 3y ago

    Yes possibly. Please send us a message through our support form.
23. 263.▲
    by ahaucnx 3y ago

    Yes to some extent but the correction factors will be influenced by absolute temperature levels, airflow in the room etc.
24. 264.▲
    by ahaucnx 3y ago

    The outdoor kit focuses on PM measurements with dual PM modules for enhanced accuracy. The indoor kit has in addition CO2 and an optional TVOC sensor. I think for a pottery studio to measure PM and VOCs is a good start (and CO2 to see how w
25. 265.▲
    by ahaucnx 3y ago

    We originally designed a smaller monitor but it makes it very difficult to get an accurate temperature reading because the enclosure heats up and you cannot have a good distance from the active components to the temperature sensor.
26. 266.▲
    by ahaucnx 3y ago

    Yes, we are looking at the SEN55. The reason we currently still use the Plantowers is that there is a lot more research out there on the Plantower and how it behaves in different environments.
27. 267.▲
    by ahaucnx 3y ago

    Thanks! Fixed.
28. 268.▲
    by ahaucnx 3y ago

    Thanks. Fixed.
29. 269.▲
    by ahaucnx 3y ago

    Fully agree. All our PRO kits have USB C and we also now use the D1 mini with USB C plug.
30. 270.▲
    by ahaucnx 3y ago

    This has been analysed extensively on our forum and the root cause was a bug in the software serial Arduino library as well as a slightly wrong command send from our library. Details [1] [1] https://forum.airgradient.com/t&#