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PM sensor reporting bad values when air hummidity is high

Posted: Wed Jan 08, 2020 1:09 pm
by rokkres
Hi,

I have similar problem to the one described in this thread: https://www.libelium.com/forum/viewtopi ... 26&t=23261. If air hummidity gets high, PM sensor starts to report unusually high values for PM1, PM2.5 and PM10 (up to few million ug/m3). Did you manage to solve the issue?

I can also send you excel spreedsheat with the reported values if it helps.

Thank you in advance.

Best regads,
Rok

Re: PM sensor reporting bad values when air hummidity is high

Posted: Thu Jan 09, 2020 6:57 am
by rokkres
Please move this post to plug & sense board since that's the configuratioj we are using. I'm sorry for the inconvenience.

Re: PM sensor reporting bad values when air hummidity is high

Posted: Fri Jan 10, 2020 8:54 am
by libelium-dev
Hi,

What is the humidity level when the PM report incorrect values? Is it an OPC-N2 or OPC-N3?

The PM sensor is a digital sensor and the P&S reads the reported values. We can't fix the behaviour of the PM sensor since the P&S only reads the returned values, it doesn't configure anything to the sensor. Let us know when the sensors start to report incorrect values and we will contact the manufacturer to try to solve the issue.

Regards