Re: Tank Depth


"Jim Thompson" <To-Email-Use-The-Envelope-Icon@xxxxxxxxxxxxxxx> wrote in
message news:r50ma2dsib6tk887j2p8r5522bq279j411@xxxxxxxxxx
On Tue, 04 Jul 2006 15:50:22 -0700, "Paul Hovnanian P.E."
<paul@xxxxxxxxxxxxx> wrote:

"James F. Mayer" wrote:

I believe that a short time ago there was a discussion about this. but
depending on the head of the tank one could use an MPX5000 series
pressure
sensor with a dip tube or am I too late?

I have a number of 55 gal drums of water that I would like to know
the
depth of in my rain water gathering system so that I don't pump it dry
and
ruin a sprinkler pump. I am going to use one of them per drum to
monitor
the levels. I believe that the pressure of one foot of head is .43 PSI
and
that a drum is about 3 feet deep, giving a pressure of 1.29 PSI. Does
this
sound correct?

That sounds about right. However ...

This technique of measuring tank depth (quantity) may not work well over
a long period of time. In a washing machine, for example, the dip tube
only needs to maintain a reading for the duration of the fill cycle. I
suspect that slow leakage or air in the dip tube dissolving into the
water over longer periods (days, weeks) may reduce its accuracy.


That's the scenario I've been pondering. I'm trying to figure a way
to measure (salt) aquarium level, for top off, that's reliable.

I'm pondering a combination of washing-machine-style dip tube plus a
(electro-mechanical) timer, to ensure that the tube clears before
refill.

Hopefully that would prevent false overfills due to air seepage from
the dip tube.


Running some of the aerator air through the dip tube would solve that
problem, I'd think.


.

Relevant Pages

  • Re: Tank Depth
    ... depending on the head of the tank one could use an MPX5000 series pressure ... This technique of measuring tank depth may not work well over ... In a washing machine, for example, the dip tube ...
    (sci.electronics.design)
  • Re: Tank Depth
    ... This technique of measuring tank depth may not work well over ... In a washing machine, for example, the dip tube ... Hopefully that would prevent false overfills due to air seepage from ... no. Continuous purge air would give erroneous readings. ...
    (sci.electronics.design)
  • Re: Tank Depth
    ... depending on the head of the tank one could use an MPX5000 series pressure ... I have a number of 55 gal drums of water that I would like to know the ... This technique of measuring tank depth may not work well over ... In a washing machine, for example, the dip tube ...
    (sci.electronics.design)
  • Re: Tank Depth
    ... I believe that the pressure of one foot of head is .43 PSI ... This technique of measuring tank depth may not work well over ... In a washing machine, for example, the dip tube ... Running some of the aerator air through the dip tube would solve that ...
    (sci.electronics.design)
  • Re: Tank Depth
    ... sensor with a dip tube or am I too late? ... I believe that the pressure of one foot of head is .43 PSI ... that a drum is about 3 feet deep, giving a pressure of 1.29 PSI. ...
    (sci.electronics.design)