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Forum Index : Microcontroller and PC projects : Question: humidity sensor for tropical forest habitat

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TassyJim

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Joined: 07/08/2011
Location: Australia
Posts: 6269
Posted: 07:40am 15 May 2023
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The Bunnings wicks are a bit bulky. I might try re-lacing one with a bit less cotton.

I did use a vacuum cleaner to suck a bit of air movement and the wet bulb dropped enough to reduce the Rh by 10% as expected.

To measure soil moisture, the resistance of plaster-of-paris between a couple of metal plates 1cm apart is not bad.

Jim
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Volhout
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Joined: 05/03/2018
Location: Netherlands
Posts: 5050
Posted: 08:17am 15 May 2023
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Not sure how accurate it is to measure the air humidity through measuring the soil humidity. But maybe that can be done also. Thanks for the suggestion.
For the time being I will focus on repeating Jim's test (I found similar wick, we use it to light fireworks newyears eve).

Volhout
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aFox
Senior Member

Joined: 28/02/2023
Location: Germany
Posts: 103
Posted: 12:34pm 15 May 2023
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  Andrew_G said  Gregor et al,
Or one of these.  Capacitive but fully enclosed (Au$31.45 + postage).
I bought one to monitor moisture content under our new house (we have a soil lens that may bring water to the surface).

Cheers,

Andrew


That looks more professional.

Gregor
 
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