I would like to pay your attention, that i have to measure the liquid electrical conductivity via one wire.
If you can resolve this, please reply to me.
Please how can i manage this with Shooting a laser in, measure light degradation,or have a magnetic float and measure inductive coupling..

Thank you .

 

You can't measure anything with one wire.

 

Measure current flow.

This will correlate to the resistance or conductivity of the liquid.

You supply 10 volts and measure .000001 amp of current. Using ohms law what is the resistance?

 

Assuming the probe doesn't have a battery inside or a mini chem lab and assuming no other equipment is used beyond said wire, probe and circuit. Then use the probe as a monopole antennae and measure how the supplied power to the probe varies with changing liquid conductivity..

 

Are you able to have a battery or other power source at the tank?

 

It would be dangerous to suggest a solution, without know the liquid and the environment.

Is it water, gasoline or H2O2?

 

You can't measure anything with one wire.

Sure you can. Cut a wire to a 1 meter length and measure the distance of something, one meter at a time.

 

There usually is a spare conductor. Ground.

 

You can't measure anything with one wire.

Sure you can. Pump some RF into it, and the SWR will change as it goes from immersed to free space.

ak