condensation in CCTV camera

I have an SD dome camera, a Night Devil, a good product in its day, it's
about five years old and has never been used. It's been in its box in
the stockroom all that time. Well, I thought I'd make use of it, but
after about three hours a patch of moisture developed on the surface of
the sensor. This could be dispersed by the application of warmth but it
would soon re-form. On examination it turns out that that the sensor is
enclosed in a very small box with a transparent front. The box is
presumably intended to be hermetically sealed, but in fact isn't, quite.
Other than wait a week to see what happens I am at a loss. Suggestions?

"Bill Wright" wrote in message
...
I have an SD dome camera, a Night Devil, a good product in its day, it's
about five years old and has never been used. It's been in its box in the
stockroom all that time. Well, I thought I'd make use of it, but after
about three hours a patch of moisture developed on the surface of the
sensor. This could be dispersed by the application of warmth but it would
soon re-form. On examination it turns out that that the sensor is enclosed
in a very small box with a transparent front. The box is presumably
intended to be hermetically sealed, but in fact isn't, quite. Other than
wait a week to see what happens I am at a loss. Suggestions?



It sounds as though there is moisture trapped within the hermetic sealed
box, that would require breaking the the hermetic seal and drying it out and
re-sealing it.

Silica Gell?
Brian

"Bill Wright" wrote in message
...
I have an SD dome camera, a Night Devil, a good product in its day, it's
about five years old and has never been used. It's been in its box in the
stockroom all that time. Well, I thought I'd make use of it, but after
about three hours a patch of moisture developed on the surface of the
sensor. This could be dispersed by the application of warmth but it would
soon re-form. On examination it turns out that that the sensor is enclosed
in a very small box with a transparent front. The box is presumably
intended to be hermetically sealed, but in fact isn't, quite. Other than
wait a week to see what happens I am at a loss. Suggestions?

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On 01/02/2016 09:54, Kinnell wrote:

"Bill Wright" wrote in message
...
I have an SD dome camera, a Night Devil, a good product in its day,
it's about five years old and has never been used. It's been in its
box in the stockroom all that time. Well, I thought I'd make use of
it, but after about three hours a patch of moisture developed on the
surface of the sensor. This could be dispersed by the application of
warmth but it would soon re-form. On examination it turns out that
that the sensor is enclosed in a very small box with a transparent
front. The box is presumably intended to be hermetically sealed, but
in fact isn't, quite. Other than wait a week to see what happens I am
at a loss. Suggestions?



It sounds as though there is moisture trapped within the hermetic sealed
box, that would require breaking the the hermetic seal and drying it out
and re-sealing it.
I would approach such a task will very little confidence in a successful
outcome. But I guess there's no alternative.

Bill

On 01/02/2016 10:35, Brian Gaff wrote:
Silica Gell?

It might draw it out I suppose.

Bill

On Monday, 1 February 2016 08:04:04 UTC, wrote:
I have an SD dome camera, a Night Devil, a good product in its day, it's
about five years old and has never been used. It's been in its box in
the stockroom all that time. Well, I thought I'd make use of it, but
after about three hours a patch of moisture developed on the surface of
the sensor. This could be dispersed by the application of warmth but it
would soon re-form. On examination it turns out that that the sensor is
enclosed in a very small box with a transparent front. The box is
presumably intended to be hermetically sealed, but in fact isn't, quite.
Other than wait a week to see what happens I am at a loss. Suggestions?

Well put it in the airing cupboard for a week, ideally in a sealed box with a load of water absorbent silica gel packs. If it still mists the water is sealed in, so you will have to open it to dry it.

Every few years I have to open, dry and reseal my C120 LNB. Now I put a sheet of plastic between the feed horn (which leaks) and LNB (which doesn't).

Bill Wright wrote:

I have an SD dome camera, a Night Devil, a good product in its day, it's
about five years old and has never been used. It's been in its box in
the stockroom all that time. Well, I thought I'd make use of it, but
after about three hours a patch of moisture developed on the surface of
the sensor. This could be dispersed by the application of warmth but it
would soon re-form.

A customer had HD IP cameras installed as replacements for PTZ analogue
ones, the new ones sat up the poles for months before the switchover
happened, for the first few weeks they fogged-up, eventually the heat
from the circuitry drive the moisture out of most of them, a couple did
need opening to clean out by hand ... I'd leave it on for a while and
see how it gets on.

On Mon, 1 Feb 2016 09:54:34 -0000, "Kinnell"
wrote:


"Bill Wright" wrote in message
...
I have an SD dome camera, a Night Devil, a good product in its day, it's
about five years old and has never been used. It's been in its box in the
stockroom all that time. Well, I thought I'd make use of it, but after
about three hours a patch of moisture developed on the surface of the
sensor. This could be dispersed by the application of warmth but it would
soon re-form. On examination it turns out that that the sensor is enclosed
in a very small box with a transparent front. The box is presumably
intended to be hermetically sealed, but in fact isn't, quite. Other than
wait a week to see what happens I am at a loss. Suggestions?



It sounds as though there is moisture trapped within the hermetic sealed
box, that would require breaking the the hermetic seal and drying it out and
re-sealing it.

I would leave it unsealed if it's for indoor use.


--

Graham.

%Profound_observation%

In article ,
says...

Bill Wright wrote:

I have an SD dome camera, a Night Devil, a good product in its day, it's
about five years old and has never been used. It's been in its box in
the stockroom all that time. Well, I thought I'd make use of it, but
after about three hours a patch of moisture developed on the surface of
the sensor. This could be dispersed by the application of warmth but it
would soon re-form.

A customer had HD IP cameras installed as replacements for PTZ analogue
ones, the new ones sat up the poles for months before the switchover
happened, for the first few weeks they fogged-up, eventually the heat
from the circuitry drive the moisture out of most of them, a couple did
need opening to clean out by hand ... I'd leave it on for a while and
see how it gets on.

If it is not all one enclosure - I can't tell from on-line pictures - and the
power source isn't a problem, consider a wire-wound resistor in the
outer/upper enclosure of a suitable value and rating to heat the air and
hence the camera, possibly controlled by a thermostat.

If there is any metal in there, clamp the resistor to it.

--

Terry

On 01/02/16 11:03, Bill Wright wrote:
On 01/02/2016 10:35, Brian Gaff wrote:
Silica Gell?

It might draw it out I suppose.

Bill

If you haven't got any dry silica gel it would be worth covering it with
dry rice and leaving it in a well-sealed box for several days. It's a
well-known method of drying out mobile phones which have been immersed
in water.

--

Jeff