level sensor

hi !

anyone of you has already deal with a sonic (or IR) level sensor ?, can someone suggest something nice ? I would like to know the beer level of a tank, so stainless is a must, i also need something that will not touch the liquid and is able to withstand some pressure

thanks for your answer

This has been asked before.
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I think someone tried a strip of temp sensors on the side of a tank.
Weight of the tank (load cell) could also be used.
Leo..

A load cell, as Wawa mentioned, seems to fit your requirements.