foggywaters wrote:
Hi

I would like to install / build a meter that would display the amount
of water I have taken from my water tank(s). There is no access to the
tank(s), installing level senders would be difficult.

I am aware of the WaterWatch. It would suffice but the literature says
the minimum water flow required is ~ 1.6 Gallons Per Minute. I don't
think it would record small demands i.e. brushing one's teeth.
Although it would be good for measuring the amount of water added to
the tanks.

I would prefer a system with a small in-line sensor sending pulses? to
a meter (LED ? LCD?) 10' away.

Any suggestions

foggywaters



If you want to build one, two solutions.
1.
Put a small propeller in a piece of glass or
transparent tube, a LED lichtsource on one side,
a phototransistor on the other side.
Clean up the phototransistor signal, and add a counter.
Then calibrate your counter by withdrawing a
known amount of water.
2.
Put a small propeller with magnet attached in the tube.
On the outside place a reed relay close by.
use switch to produce pulses, for the rest see solution 1.

Both are 10 dollar solutions.