[chbot] Wanting real data - How best to mount sensors outside in the elements?

[Richard Jones]

Some of the best weather proof enclosures leak eventually as they age. I
have seen drain holes drilled to release the water trapped inside IP68
certified weatherproof enclosures.

For infra red investigations a mobile phone camera sees infra red from IR
remote controls quite well, so you may be able to use this feature as a
crude test for infra red transmission through different filter / enclosure
materials.

Richard Jones

On Fri, May 29, 2020 at 4:47 PM Quentin McDonald <dqmcdonald at gmail.com>
wrote:

> I would second the waterproofed one-wire sensors, they seem pretty robust.
> Have been measuring ground temperature for a while now. I've also had
> reasonable luck with Sistema food storage containers as a cheaper solution
> compared to true weatherproof enclosures. They do eventually pick up some
> UV damage but are so cheap it hardly matters.
>
> I do have a question of my own. I want to augment my weather station with
> a UV sensor and an infrared thermometer module to measure sky temperature.
> But how to weatherproof them? From what I gather some types of acrylic are
> UV transparent but how does one know which? And for IR  - can you even have
> something between the sensor and the object you are trying to measure? I
> did wonder if perhaps just a long thin tube to collimate it (since I only
> want to measure a small section of the "sky" anyway). Then just hope for
> the best with rain getting in...
>
>
> Quentin
>
> On Fri, May 29, 2020 at 2:17 PM Robin Gilks <robin at gilks.org> wrote:
>
>>
>> > Hey all list dwellers,
>> >
>> > I'm looking for advise, suggestions and general pointers to what other
>> > have done in order to get various types of sensors working out in the
>> real
>> > world - that is beyond the bench.
>> >
>> > What sensors perform better / marginal, what methods provide the best
>> > mechanical / environmental protection.
>> >
>> > Where should I position say an outdoors temperature sensor?
>> >
>> > Mostly I'm after less of the theory and more of the I tried this but it
>> > mutated a spider which ate my cat kind of thing. So don't do that.
>> >
>> > Thanks for reading, stay safe. Wash your hands.
>> >
>> > Regards,
>> > Andrew
>>
>> I've been using 1-wire ds18b20 for some 15 years and the ones that are in
>> a sealed stainless tube seem very reliable outside - I have one on the
>> roof of the pump shed in full sun to get the sky temperature and one in a
>> hedge for the shade temperature on my irrigation controller. They is used
>> for frost detection. Hadley down at Nicegear has them in stock, in fact
>> the ones I'm using at present I got from him some 5 years ago.
>>
>> The BME280 I use in my weather station does temperature, humidity and
>> pressure and is fine so long as it is kept out of direct influence with a
>> Stevenson screen (its a bit delicate). I made mine from upturned flowerpot
>> saucers, threaded studding with spacers between like this:
>> http://gilks.ath.cx/gallery3/Building-a-PJ-inverter/IMG_5661
>>
>> Other sensors, I would go for automotive types are they are going to be
>> very robust to start with!
>>
>> --
>> Robin Gilks zl3rob/g8ecj
>> Internet: g8ecj at gilks.org    http://www.gilks.org
>>
>>
>>
>>
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