Re: Measuring liquid level with bubbles using an ultrasonic transducer

[overgeo@xxxxxxxxx]

Sorry for my late answer, i have been doing other projects. The liquid
is oil and is viscous, the accuracy is not a lot, the height of the
tank is 5 meter and an error of 10 cm is perfectly asumible.

So i can use a differential pressure transducer, with one transducer
that measures the pressure in the head of the tank and another one
that measures the pressure in the bottom of the tank, and with the
difference of both pressures i get the heigh of the liquid with this
formule h = differential pressure/(specific gravity * g)  where g =
acceleration due to gravity.

I have been looking for some sensors, and in this page there are some
of them. http://www.sensotec.com/pdf_catalog06/fp2000.pdf, the fp2000
wet/wet differential, i think will be suitable, what do you think?

To calculate the pressure range, i can use the formule.

max differential pressure =    h_max * (specific gravity * g),  is
this correct?

In addition the idea of the pipe was good, but i think that it will be
easier the differential pressure.

Finally thanks so much for all your answers, and sorry for my late
answer.