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<p><font face="Candara">The thermal cycling is a big issue.</font></p>
<p><font face="Candara">We used to have antennas that had triple O
ring and sealant and they sucked water in.</font></p>
<p><font face="Candara">Cure was to drill a hole and add a long tube
to stop the spiders ... no more water.</font></p>
<p><br>
</p>
<p><font face="Candara">Mark B</font><br>
</p>
<div class="moz-cite-prefix">On 21/07/23 16:50, Charles Manning
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAE21AQoTLxLs-TvX8Ze8ZtN6dS_zfJfk0=0P+60QyFuQu57G-w@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="auto">Jasper, I am curious as to the pressure you
subjected it to.
<div dir="auto">Put it 20 meters deep in the ocean and I would
not be surprised if it leaks. </div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, 21 Jul 2023, 16:46
Jasper Mackenzie, <<a
href="mailto:jasper.mackenzie@gmail.com"
moz-do-not-send="true" class="moz-txt-link-freetext">jasper.mackenzie@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>I tried and tried with these and the I2C chips and
water always found a way in.</div>
<div>All the readily available options failed.<br>
<div>I suspect that potting material is the best bet.</div>
<div><br>
</div>
</div>
<div>Recent experience from some friends suggests that it is
also the heating and cooling pulling moisture down the
wires.</div>
<div><br>
</div>
<div>My need is long gone, but I am interested to hear of
your success please!</div>
<br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, 21 Jul 2023 at
16:35, Charles Manning <<a
href="mailto:cdhmanning@gmail.com" target="_blank"
rel="noreferrer" moz-do-not-send="true"
class="moz-txt-link-freetext">cdhmanning@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div dir="auto">I have used epoxy and wax before. A lot
depends on how waterproof and how durable you want to
achieve. You could also use that liquid electrical tape
stuff.
<div dir="auto">Not all epoxies are waterproof for a
long period underwater. Also consider that some
materials are insulating and slow down the readings. </div>
<div dir="auto"><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, 21 Jul 2023,
14:04 Volker Kuhlmann, <<a
href="mailto:list57@top.geek.nz" target="_blank"
rel="noreferrer" moz-do-not-send="true"
class="moz-txt-link-freetext">list57@top.geek.nz</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px
0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">I have a bunch of
these capped metal tubes and a bunch of temperature<br>
sensors in TO-92 case. What is a good material to fill
the tube with<br>
before pushing in the sensor, that is thermally
conductive? Epoxy glue?<br>
<br>
Yes they are available ready-made on Ali (waterproof
DS18B20) but I<br>
don't trust the sensor they use.<br>
<br>
Thanks,<br>
<br>
Volker<br>
<br>
-- <br>
Volker Kuhlmann<br>
<a href="http://volker.top.geek.nz/" rel="noreferrer
noreferrer noreferrer" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">http://volker.top.geek.nz/</a>
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