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Topic: how do i prevent moist and rain damage (Read 1 time) previous topic - next topic

BoinQ

Hey, i'm planning on building my own little weather station with my arduino, but my main concern is how i can make it survive rain and moist in the rain, because we all know electronics and water don't mix ;P

i'm planning to equip the weatherstation with a atmospheric pressure sensor, and if that is gonna work i can't put it in a water proof container, because then it wouldn't be able to messure the correct atmospheric pressure :S
And the temprature sensor is a small circuit board, and again that can't be mixed with water or air moist :S

What do i do guys?

PS: I'm not sure if this is in the right forum ;P

AWOL

Well, an important thing to remember is that rain usually falls downwards, and pressure sensors often have a tube coupler that allows them to be mounted in a dry place, but have the measuring part exposed to ambient pressure.
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

BoinQ

but when it rains, the air is very moist, won't that give some trouble to the electronics?

here's the temprature sensor:
http://www.electrozone.dk/digital-temperature-sensor-breakout-tmp102.html

and here the atmospheric pressure sensor:
http://www.electrozone.dk/sensors/temperatur/barometric-pressure-sensor-bmp085-breakout.html

Most of it is in danish, but you can read about both on sparkfun

AWOL

Quote
but when it rains, the air is very moist

Quote
pressure sensors often have a tube coupler that allows them to be mounted in a dry place
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

BoinQ

but won't the moist get into that tube and ruin the sensor?

sonicj

http://www.corrosionx.com/

probably want to avoid getting it on your humidity sensor.

BenF

Quote
And the temprature sensor is a small circuit board, and again that can't be mixed with water or air moist :S

Choosing sensors more apt for the purpose is probably a good start. Here's a good alternative for a weatherproof digital temperature sensor (3.0 to 5V).

http://www.sureelectronics.net/goods.php?id=1020

BoinQ

those are hard to come by in Denmark :S

Grumpy_Mike

You want to look for a 'conformal coating', these are materials like lacquer that you paint on or spry to stop condensing humidity causing you problems.
They are not cheap, a selection can be seen here:-
http://uk.farnell.com/jsp/search/browse.jsp?N=500006+1000416&Ntk=gensearch_001&Ntt=conformal+coating&Ntx=mode+matchallpartial

AWOL

If you're worried about moisture reaching the sensing element, isolate it with a U-tube, with a non-hygroscopic oil in the bend.
This will prevent any airborne contaminents (except those present when you connected the tube!) from reaching the sensor.
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

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