ahaucnx

26 ms·

331.
by ahaucnx 4y ago
The PM sensor will easily pick up the dust from the construction site and you will probably notice changes in wind direction as well.
332.
by ahaucnx 4y ago
Yes very much. We are in touch with OpenAQ on this matter.
333.
by ahaucnx 4y ago
Thank you for your feedback. With the new version (3.7) that is also now sold as the updated kit we have addressed most of these issues. - we now supply stainless steel torx screws including screw driver - we have now the SGP41 AirGradient
334.
by ahaucnx 4y ago
Customer support will be in office tomorrow and we are sending a free replacement to all customers that have been impacted by a non working D1. The "Mimi" version should not have the problem and we found it to be very stable and i
335.
by ahaucnx 4y ago
PM, CO2, temperature and humidity can be fairly accurately measured with consumer monitors provided they use good sensors. You can check if the monitor is RESET AIR certified which is an independent and 3rd party test against reference devi
336.
by ahaucnx 4y ago
No specific reasons other than that we are pretty happy with the quality from Sensirion and thus like to use their sensors.
337.
by ahaucnx 4y ago
We also used the A003 in the past and were not happy with accuracy and quality. We had quite a number of them failing early. The 5003 is a lot better in my opinion.
338.
by ahaucnx 4y ago
Yes I think they should be suitable for that.
339.
by ahaucnx 4y ago
It should give very similar results. As far as I know the Aranet also uses a CO2 Sensor from Senseair.
340.
by ahaucnx 4y ago
Here is the working link: https://www.airgradient.com/open-airgradient/blog/positive-p...
341.
by ahaucnx 4y ago
We are based in Nortern Thailand. In March / April every year the air quality is very poor, often beyond 100 ug/m3. I will check the link.
342.
by ahaucnx 4y ago
The presoldered kit also comes already pre-flashed and you can literally build it in 5-10 minutes. Just need to plug in the sensors, one cable and screw it together.
343.
by ahaucnx 4y ago
Yes unfortuntately we see a clear trend among other companies towards walled gardens, closed data and forcing people into subscriptions. We at AirGradient do not support this development and made very clear statements on our website.
344.
by ahaucnx 4y ago
Most people find it easier to solder through holes than SMD. We use SMD in our commercial product. We are testing the SCD4x and like it so far. It might be a future option.
345.
by ahaucnx 4y ago
We have made very good experience with the Plantower PMS5003 PM sensor and thousands of them went through our test chamber. The plantower has also shown one of the best accuracies for low-cost sensors compared to reference stations in vario
346.
by ahaucnx 4y ago
Compared to CO2 and PM measurements, TVOCs are the most difficult to measure because they encompass a wide range of chemicals that trigger the sensor. Some are very harmful, e.g. aggressive paint and others (hopefully) harmless like sunscre
347.
by ahaucnx 4y ago
We also offer a fully certified commercial product (AirGradient ONE) focusing on B2B (Offices, Schools). Then you have monitors from other companies e.g. Awair, AirThings, Kaiterra, Air Visual etc measuring similar air quality parameters. W
348.
by ahaucnx 4y ago
This is an updated version of our DIY air quality monitor that now includes a configuration button and some other PCB improvements around the I2C bus. It has also pin breakouts so you can easily add additional sensors if required. Hardware
349.
by ahaucnx 4y ago
Yes but so far we did not find suitable radon sensor modules available in the market that we could easily integrate into our monitor.
350.
AirGradient Open Source Air Quality Monitor for CO2 and PM2.5 Measurements(airgradient.com)
557 points by ahaucnx 4y ago|159 comments
351.
by ahaucnx 4y ago
At AirGradient we are specialized in measuring indoor air quality in schools and monitor thousands of classrooms in real-time for CO2, PM2.5, temperature, humidity and TVOCs. We do see very similar CO2 ranges in our data as presented in thi
352.
by ahaucnx 4y ago
We put an air quality monitor on a tethered weather ballon which sends real time data with LoRa to a base station. To keep things simple the base station receiver connects through usb and we log the incoming data directly into Chrome with w
353.
by ahaucnx 4y ago
Underlying study can be read here: https://pubs.acs.org/doi/pdf/10.1021/acs.estlett.2c00807
354.
UV lamps used for disinfection may impair indoor air quality(phys.org)
2 points by ahaucnx 4y ago|1 comments
355.
by ahaucnx 4y ago
Yes but keep in mind that the colored LED is still showing green when the air is very polluted. I wrote about it. https://www.airgradient.com/open-airgradient/blog/ikea-vindr...
356.
by ahaucnx 4y ago
Interesting that the EPA proposes going from 10 μg/m³ to 8 - 11 μg/m³ for the annual PM2.5 exposure and proposing to leave the 24h limit at 35 μg/m³ whereas the WHO air quality guideline that came out last year set much lower
357.
EPA proposes to strengthen air quality standards(epa.gov)
158 points by ahaucnx 4y ago|225 comments
358.
by ahaucnx 4y ago
We at AirGradient market both, a commercial (closed-source) air quality monitor as well as a commercial open software / open hardware one (monetized through selling kits [1]). Unlike the article might indirectly imply, I see little dif
359.
by ahaucnx 4y ago
Very interesting read. Based on our experience developing and manufactoring air quality monitors, making a customized PCB should be done as early as possible in the developing process. With easy to use editors (e.g. easyEDA) and cheap and f
360.
by ahaucnx 4y ago
This articles is very misleading and makes conclusions based on a low cost sensor that in most cases will give you very wrong absolute readings. I would not trust the results at all. Unfortuntaley all too often, people do air quality measur

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