Another approach to the multiple sensor setup is to use a hub and have
each sensor, or group of sensors on a different channel. You could do
this with a Raspberry Pi and Sheepwalk RPI3 + RPI3a adapter to give you
8 separate channels.
http://www.raspberrypi.org/
http://www.sheepwalkelectronics.
this case, if the wiring shorts, it will kill all sensors. u will have to
find out which is the bad one, unconnect it, and then you can continue.
also to notethat likely they will fail in proportion if time, so if all
are same, they will fail about the same time.
Vajk
On Mon, Dec 9, 2013 at 4:
I think you may have a misunderstaning of the way these sensors work.
One adapter can cover many sensors. As I said, you only need to the long
run to a connection box near the water, then connect the sensors
serially inside the box.
jerry
On 12/09/2013 01:35 AM, Håkan Elmqvist wrote:
Thanks
Thanks all for your tips.
I will try some of them. Multiple sensors is a good solution but
requires multiple adapters and cables.
H
2013-12-09 00:15, Michael Markstaller skrev:
> On 08.12.2013 21:31, Håkan Elmqvist wrote:
>> I have for some years monitored sea water temperature with DS1820s and
see my sollution at the bottom of the page. http://fstab.nl/en/parts
My experience is that water always finds a way along the wire. With a u
shap tube and the tube watertight at the bottom it will eliminate that.
Nico
Håkan Elmqvist wrote:
I have for some years monitored sea water tempera
On 08.12.2013 21:31, Håkan Elmqvist wrote:
> I have for some years monitored sea water temperature with DS1820s and
> OWFS.
I have some in saltwater for about 4y now without failure.
But to be able to give any meaningful answer: it is very important to
know the salinity and temperature of the water
Hi,
A few thoughts on this.
First, I agree with the post that the wire is suspect. Standard
telephone wire is not rated for salt water submersion and will probably
fail in the time frames you see. They make cables with specific jackets
and gel filling that are designed to go in these conditio
Being the sea, I assume the rate of change is very slow so speed of
conductance of the enclosure should not be an issue. Why not pot it in
something like a substantial diameter PVC pipe instead of a corrosive
metal? That said, my guess is it might be your wires and not the sensor
enclosure that is
I put them in copper tubing with heat transfer compound and crimp and fold the
end. You could apply solder as well, but I don't because I use them in boiling
wort. I have not yet had a failure.
Colin
> On Dec 8, 2013, at 12:31, Håkan Elmqvist wrote:
>
> I have for some years monitored sea w
I have for some years monitored sea water temperature with DS1820s and
OWFS.
I have soldered the sensors to a twisted pair telephone wire and put
them into a short piece, ca 50 mm, of 12 mm of copper tubing. The tubes
have a 3 mm hole in the middle where I have injected normal RTV one
component ac
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