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Fantastic value water or holding tank indicator

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hmmm, as you say, a simple idea.

Just ten LEDs connected to 10 bare ended wires immersed into the tank at 10% increments.

In this day and age I thought it was going to be some sort of echo sounder or something !

I suppose the tricky bit is using some sort of skin fitting to pierce the tank and hold the DIY vertical "rod" in place. :)

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I reckon even that would be easy to achieve with a length of plastic conduit and a waterproof deck gland, poke the prepared cable down the tube and seal the top with some silicone or liquid latex. A couple of holes drilled near the top of the tube and at interval down it’s length , that would ensure the liquid could rise and fall easily inside the tube.

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