Looking for resistive sheet material

Hello,

I'm looking for electrically resistive sheet material from which to make custom potentiometers. These will be slider type pots, not rotary, with track width varying along the length to give particular resistance versus position characteristic.

Can anyone suggest a source of suitable material, something along the lines of carbon loaded plastic sheet?

I'm aware of the Adafruit pressure sensitive conductive sheet (Velostat/Linqstat), but this is rather high resistance at about 30 kohm/sq, and I think might have limited life with a slider contact dragging across it. I also know about Teledeltos conductive paper, but that has same drawbacks.

Ideally I'm looking for hard sheet material with 100 to 1000 ohm/sq sheet resistivity. And it would need to be available for a hobbyist in the UK in sensibly small quantity.

Many thanks for any help or suggestions.

 

Hi Gryd3,
Well, I guess I'd want it to last for many slider operations, at least hundreds.
AS for ordering existing slides, I assume you mean off-the-shelf slide pots. These all seem to be small, and I was hoping to
achieve better precision and finer control by making my own large slides.

 

Hi Gryd3,
Well, I guess I'd want it to last for many slider operations, at least hundreds.
AS for ordering existing slides, I assume you mean off-the-shelf slide pots. These all seem to be small, and I was hoping to
achieve better precision and finer control by making my own large slides.

 

Hi Again,
Yes, you are right, on looking at the RS website I now find that slide pots by Alps are available with
length of about 130mm, and with log characteristic, which will be close enough, and they are not too expensive.
So I will purchase a couple of these to try out, and so might not need to make my own.
Many thanks for your advice.
Ken.

 

Many thanks.
I think I should close this thread now, but am not sure how to do so.
Can you advise, or close it for me?
Thanks again, Ken.