Liquid level indicator

For my home brewery I need to know if a container has liquid past a
certain level, and if it is, turn on a pump.

Can anybody suggest a way of doing this? I don't really want to use
anything which floats in the liquid, I just need to know if the liquid
is past a certain point/level.

If there's anything "off the shelf" which I can screw in to the
container, then that would be fantastic.

Regards,
Mark

.

Relevant Pages

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