Re: Liquid level indicator

MarkMc wrote:
> 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.

Get one of those "touch to on" lamps.

Take two insulated copper wires, say 18 SWG and attach them to your
vessel in such a way that when your liquid reaches the desired level,
the two copper wires touch the liquid.

Connect the other end of one of the copper wire to earth
Connect the other end of the second copper wire to the touch lamp's
body

Connect your pump to the AC output of the touch lamp (where you're
supposed to fix a light bulb)

Connect a relay to the AC output of the touch lamp, in such a manner
that when energised, it shorts the lamp's body to earth.

Mike

.

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