How can i measure AC and DC microampere current with low noise. Is there any method for this?

I need to measure the amps in the water. How can i do that? Please give me information about that. I can't find anything :(

Is the result we get ac or dc?

@Nca78 Where do i attach the probes? How can i measure?

@Nca78 Thank you for your answer. I'm looking forward.

@mfalkvidd If you have something related to this project, can you share it? (circuit schema or something)

I am trying to do the project in this link (https://www.openhardware.io/view/380/Micro-nano-ampere-meter-double) but I could not understand the connection parts. If anyone has information, can you help me? My goal is to measure between 0-50 microamps.