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Topic: How to weatherproof sensors (Read 1 time) previous topic - next topic


I'm working on a project to measure soil dryness in multiple outdoor potted plants, and I'm looking for a moisture sensor that can withstand the elements. I'm found several stores selling sensors like this, but I can't imagine that thing lasting more than a couple weeks outside before sun and rain destroy all the exposed contacts.

Is anyone aware of other cheap but robust moisture sensors? How would I weather proof the sensor?


You can make it waterproof by using kit you also use in the bathroom or with sugru - http://sugru.com/about -
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)


The way you have it in your schematic isn't the same as how you have it wired up!


Industrial sensors use a conformal coating. http://en.wikipedia.org/wiki/Conformal_coating  MGChemicals sell this (among others). It is a thin epoxy type of coating which I use for exterior sensors in a marine environment. It is extremely durable and moderately flexible.
Don't breath in the magic smoke!


If you seal the sensor , so that it is waterproof,   then the soil moisture and humidity won't be able
to get into it.   
I suspect that a completely waterproof solution is not what you actually want, for your stated application.

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