'POT' issues with long cable

[Archangel]

Some years ago, I had come across a page that advertised a plastic coated tape one could buy in any length; when immersed vertically, the pressure applied on the tape would change its resistance, depending on how much of it was submerged.

Unfortunately, I hadnt saved the URL, and cant seem to locate it now, however much I googled.

You can "roll your own" 2 wires, some conductive foam, some heat shrink tubing, seal the end which is immersed . . . HOW DEEP is the water ?

[aratti]

10 stainless still screws (M3) with 20 nuts and 20 washers will cost no more than 1 $. they will be in AISI 304 not 316 but since we are dealing with water, they are ok.

Than he can use a resistive or capacitive solution as he prefer, having the resistors or caps perfectly sealed into a plastic tube.

Where is the problem?

Al.

[Archangel]

10 stainless still screws (M3) with 20 nuts and 20 washers will cost no more than 1 $. they will be in AISI 304 not 316 but since we are dealing with water, they are ok.

Than he can use a resistive or capacitive solution as he prefer, having the resistors or caps perfectly sealed into a plastic tube.

Where is the problem?

Al.

I like that better than submerged rods, and it will not require a machine shop, wires are in the pipe (encapsulated) great! See, that's some of that great engineering and design found in Ferrari, Alfa Romeo, I like it.