ahaucnx

8 ms·

61.
by ahaucnx 2y ago
Achim, founder of AirGradient here. Just want to clarify that this submit was not done by me or our team.
62.
by ahaucnx 2y ago
The MH-Z19 is similar from the performance of the S8 but we do see more noise in the readings and the MH-Z19 also seem to have less life time. We see some of them dying after around 5 years whereas the S8 has a ten year warranty and so far
63.
by ahaucnx 2y ago
If you take the time and actually read the blog post I linked to, you will see that mostly it is about indoor CO2. However, to understand the performance of these different sensor technologies it is important to point out that they fail und
64.
by ahaucnx 2y ago
There are definitely elements in the voice that totally sound like Jeff.
65.
by ahaucnx 2y ago
Not sure what you mean with calibration here. Above is not so much about calibration but correlation. Basically comparing the monitors to the reference data.
66.
by ahaucnx 2y ago
Outdoor CO2 levels can go up to 700-800ppm in rural areas due to plants creating CO2 [1]. I was initially surprised it's that high but it was verified with reference instruments. Why measure CO2 outdoors? We are able to detect emission
67.
by ahaucnx 2y ago
Great project, lovely design and super cool that it's also open source hardware. We at AirGradient open sourced our monitors around 2 years ago and this has been the best decision for our company.
68.
by ahaucnx 2y ago
We did some extensive testing of photo-acoustic and optical NDIR CO2 sensors indoors as well as outdoors and also in comparison to scientific reference instruments. I just updated the blog post that I wrote last year [1] with the specs of t
69.
by ahaucnx 2y ago
I'm a strong proponent of open data but I think it needs to go beyond science. Companies should also be incentivized or even required for keeping designs, data, interfaces etc. open. Because often scientists are reliant on devices and
70.
by ahaucnx 2y ago
I agree 100%. I would really underline the ability of the founder to have this pretty unique ability to see and set the strategic direction of the startup which requires a lot of abstract thinking with the tactical and operational skills to
71.
by ahaucnx 2y ago
We were working on this blog post for a few months to make sure it's really detailed. Happy to answer any questions.
72.
Is Your Air Quality Monitor Trustworthy? How to Test and Find Out(airgradient.com)
2 points by ahaucnx 2y ago|1 comments
73.
Satellite watches as hazardous wildfire particles drift into the air(space.com)
3 points by ahaucnx 2y ago|0 comments
74.
by ahaucnx 2y ago
This -among climate change in general- is one of the reasons we launched the largest crowd sourced real time CO2 map. [1] The main idea behind is to create more awareness on local and regional emissions like the wildfires in Canada as well
75.
by ahaucnx 2y ago
I wrote that article. This is something that I'm quite serious about and finally managed to write about it. I would be very interested to hear some thoughts on it from the hn community because I wonder if there is an important aspect t
76.
We Don't Have Any Sales People(airgradient.com)
3 points by ahaucnx 2y ago|1 comments
77.
Air Quality Stripes(airqualitystripes.info)
1 points by ahaucnx 2y ago|0 comments
78.
BYD surges past Honda and Nissan's sales targets Ford with low-cost EVs(electrek.co)
1 points by ahaucnx 2y ago|0 comments
79.
by ahaucnx 2y ago
I second that. Originally we were targeting schools as our main customers but found it incredible difficult to sell too. The main reason probably that the beneficiaries (the students) are not the decision makers (the school admin) and that
80.
by ahaucnx 2y ago
Interesting. I have two questions: 1) What parameters are you measuring ? Did you think about also measuring gases? 2) What's your business model?
81.
by ahaucnx 2y ago
One issue could be that many of these startups are venture funded. So they don't need to quickly find a solution that works and then scale up. As a result they might spends too many resources on something that just doesn't bring a
82.
by ahaucnx 2y ago
I think the scary thing is that we can measure these health outcomes and probably connect to a source like a chemical plant but we still don't understand what exactly is causing the cancer. For example there are more than 10.000 VOCs i
83.
by ahaucnx 2y ago
Be careful with hosted services like Amazon CloudWatch. They can get quite expensive if you log too many details. I think you can really save a lot of money with your own solution, eg using Prometheus / Grafana.
84.
by ahaucnx 2y ago
With more affordable sensor technology, citizen science has a huge potential to become a strong force just by being able to deploy a large number of people in a short time span. However some of the problems is that it's not really reco
85.
by ahaucnx 2y ago
The clarity also uses the Plantower sensor. A high price does not necessarily mean better sensor modules.
86.
by ahaucnx 2y ago
You raise some good points. I will reflect on them. Thanks!
87.
by ahaucnx 2y ago
I had a look but it's unclear that it is an NDIR CO2 sensor. There are cheap Chinese CO2 sensors that actually do not measure CO2 but estimate it from VOCs. You can test this easily. Spray some Ethanol around your sensor and see if th
88.
by ahaucnx 2y ago
Achim Founder of AirGradient here. Yes, I'm curious about this too. Could you clarify what exactly in this post you think is spammy? We do try to write interesting and informative blog posts and also highlight important aspects that ar
89.
by ahaucnx 2y ago
Achim from AirGradient here. I'm often personally going on Zoom call with customers to make sure they get 100% out of the monitor and address these types of questions. Please send me a note through our support form and I'm happy t
90.
by ahaucnx 2y ago
I am not ruling it out in the long term. I actually also would love to have a wired Ethernet connection and if we grow further we might very well come to the point where the 5% really matter and we have more resources available to develop i

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