I'm sorry if I was unclear, I'll try to explain more detailed.
Stock sensor is variable resistor and I don't have stock sensor anymore.
I was planning to build custom capacitive level sender because it seems impossible to find suitable for my needs as I don't wan't one with flange.
you highlighted the wire labeled as green.
so, what we know.
you have a green wire.
what we do not know,
everything else about the device.
Yes, green wire goes to level sender unit and it should be 0-100ohm or 0-510ohm.
your question is rather interesting.
Read capacitance from sensor ADC 0-1023 and control TTL transistor with PWM?
what does TTL do in your application ?
I thought I'd use logic level transistor but is it needed just with MOSFETs?
I was playing with high amp logic level MOSFET and led strips while ago and I was told that "normal" MOSFET would not be suitable.
what does your device do with PWM as an input ?
I want to simulate stock level sender by kind of "dimming" with PWM. Can this even work?
I think the sensor is just sensing the level using a capacitance sensor, rather than reading capacitance. So the sensor does all the processing to give out a voltage (or maybe a resistance?) proportional to fuel level.
So I dont think you need to convert between capacitance and resistance, you just need to scale from empty to full.
As I said above, I'd need to build custom sensor because of limitations of space,
it's motorcycle tank and it should be without flange but with small thread.
Most of sensors give 0-5V output and I don't think I can use these with my meter can I?