Have you tried to use the gore membrane? they are created to isolate
electronics from moisture and water up to immersion!
but greater the isolation level and higher the cut on high frequencies
Here some info:
http://www.gore.com/en_xx/products/venting/portable/cell-phone-product-comp=
arison.html
http://www.gore.com/en_xx/products/venting/portable/2-way-radios.html
Cheers
Ivano
Dodotronic
Il giorno lun 27 lug 2015 alle ore 18:38 'Gene W5DOR'
[naturerecordists] <> ha scritto:
>
>
> The pvc tube is used for the body of the mic with the EM172 inside
> cushioned with a set of foam and rubber grommets. It can be made easily =
by
> anyone. I'll find my eng dwg and post it. I will also find my pics and
> description of the mic unit that made it through hurricane Ike. I still
> have that assembly right here in front of me. I'll try to explain how th=
is
> assembly is protected from the rain and include some suggestions for
> outdoor mounting. I will also include a pic of my cable strain relief
> EM172 mounting and the simplest EM172 outdoor mounting.
>
>
>
> Gene
>
>
>
> *From:* [mailto:
>
> *Sent:* Sunday, July 26, 2015 7:59 PM
>
>
> *To:*
> *Subject:* RE: [Nature Recordists] Weatherproofing Mics?
>
>
>
>
>
> Well, you probably couldn't organise a better test than that - 7 years in
> a tree is impressive even without the hurricane.
>
>
>
> I don't understand about the PVC tube, etc. Was the box inside the tube,
> which was inside the bottle? Why so many layers? I assume both ends of th=
e
> bottle were cut off? It sounds like it would affect the acoustics.
>
> Peter Shute
>
> > -----Original Message-----
> > From:
>
> >
> <>]
> > Sent: Monday, 27 July 2015 9:58 AM
> > To:
> > Subject: RE: [Nature Recordists] Weatherproofing Mics?
> >
> >
> >
> > Actually the strain reliefs are a part of the seal. I epoxy
> > the EM172 inside the strain relief and then when you mount it
> > in the wall of your enclosure you use a sealant on the
> > mounting threads and o-ring. This method relies on the
> > moisture-proof seal on the capsule. While I don't recommend
> > it for use as a hydrophone our experience shows it is good
> > protection from the weather.
> >
> >
> >
> > I used it with a froglogger years ago mounting it in a pvc
> > tube and then in a 2-liter coke bottle for additional
> > protection. We then glued foam rubber on top of the 2-liter
> > plastic bottle to dampen the noise from the raindrops. Then
> > it was mounted in a tree in the Spring of 2008. A few months
> > later we suffered a direct hit from hurricane Ike. It was
> > mounted in a tree near a stock pond on my son's horse farm.
> > He lost 42 large trees due to the hurricane but the tree the
> > mic was in was spared. I just retrieved that mic a couple of
> > months ago because they we enlarging the stock pond and had
> > to cut down the tree the mic was mounted in. It's a little
> > discolored but still works all these years later. I haven't
> > run any tests in the lab but it sounds good just like the day
> > it was installed.
> >
> >
> >
> > Gene
> >
> >
> >
> >
> >
> > From: [nae
> >
> > Sent: Sunday, July 26, 2015 6:38 PM
> > To:
> > Subject: RE: [Nature Recordists] Weatherproofing Mics?
> >
> >
> >
> >
> >
> > So you're saying EM-172s are already moisture proof, Gene? We
> > just need to seal the edges of the holes they're mounted in?
> > Did you also provide any kind of shelter to avoid rain
> > hitting the capsules directly?
> >
> > I assume the strain reliefs are just a convenient method of
> > mounting them, not an essential part of the seal?
> >
> > Peter Shute
> >
> > > -----Original Message-----
> > > From:
>
> > >
> <>]
> > > Sent: Saturday, 25 July 2015 1:13 AM
> > > To:
> > > Subject: RE: [Nature Recordists] Weatherproofing Mics?
> > >
> > >
> > >
> > > A few years ago I was shipping a froglogger that used a LS-7 and it
> > > had weather-proof EM-172 mounted in the sides of a pelican case. I
> > > haven't been able to do much with frogloggers lately
> > because of health
> > > issues. Just got out of hospital again a few days ago.
> > >
> > >
> > >
> > > I have some cable strain reliefs that I mount the EM172
> > > inside of with a generous amount of epoxy. The only part of
> > > the EM172 exposed is the face of the capsule with the
> > > moisture-proof seal. I'll see if I can find a few and send
> > > them to ya. Email me off list and give me an address. You
> > > also need some sealer around the hole where it mounts in the
> > > side of the case.
>
>
>
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