I opened a discussion with one of the NDIR sensor manufacturers, explaining these requirements to them. In short, they said the high temperature is problematic.

Your idea with the buffer tube is good, and we did something similar in the past, when several A3s were installed on buses and wanted to have some protection from the high pressure jets used to wash them.

But on PM2.5/PM10 readings there were two issues: 1) a decrease in amplitude, compared to units running at the outside. 2) a delay in registering the elevated readings, as the air had to slowly travel the tube.

2) is not a problem for you. With enough time, 1) should reach the real value too. So if you can have this run for let’s say, half an hour, you should get close to the real value found in the hot area. You’ll need a tube + a fan, to force the air from the sauna all the way through.

Planning on doing this anywhere soon? Let me know if we can help.

Hola,

Also see https://www.youtube.com/watch?v=6P6reXvc5UE for a quick example on how you can convert the timestamps yourself.

Nothing fancy there, really, these were some 3.3V (5V is good too) active buzzers . They are controlled with a NPN transistor so you can use pretty much anything. You can also connect a LED instead. Here is another link: https://www.aliexpress.com/item/33059794164.html and a picture attached.

Welcome Rob and thank you.

There are a few implementations using the code for upload. You need to do the HTTP call, having all those parameters added to the url. Can you post your work so far?

Uhm… that’s a bit complicated as that file is encrypted. Data that is not being sent to the server will be stored there, to allow sync later on.

I would stick to the standard CSV files. If WIFI is connected, the CSV files will be generated.

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