DIYbanter - View Single Post - Remote sensing of water holding tank levels (measuring contraption)

dpb

On 8/21/2011 8:12 AM, wrote:
On Aug 21, 5:25 am, G. wrote:
SF Man wrote:

Hmmmm... that would be bad news. I 'thought' each sensor would be a
different 'zone' so that the warning light would be a ladder of sorts.

For example, zone 1 triggers at, say, 1/6th the tank, zone 2 triggers at
2/6th, zone 3 at 3/6ths, etc., until zone 6 triggers at full.

Yes, you can do it like that. Waterbugs are submersible, that's why
they say can "detect ABSENCE of water". I've been in the business a
while, and they are reliable (first hand experience). The other
Winland environmental sensors are great too.

Yes, he can do it like that. ...

....[discussion on connections/display/etc elided for brevity]...

And if he goes the wireless route, instead of a bunch
of sensors he could use one transducer that measures
water pressure in the bottom of the tank and
know exactly how much
water he has. He just has to interface that to an
ethernet I/O device that is compatible.

As well, I'd question how well the waterbug will work as a level sensor
rather than a dampness detector as it is intended. In a tank the wall
will still be wet after the level has dropped past it for a (probably
considerable) length of time and I'd wonder what the sensitivity will be
to detect that film surface...it might work satisfactorily but reading
the doc's online doesn't give me a warm fuzzy that they're at all
designed for the purpose. Perhaps the sensitivity is adjustable or they
require more water than the damp surface but I'd surely go w/ a trial
run or talk w/ manufacturer on the proposed application before I'd spend
much money on the idea.

--