Voltmeter/data logger

[Andrew Moffat]

I need a data logger that has a resolution of 0.1 microvolts, is there such
a thing that doesn't cost the earth?

 

[Robert Baer]

I need a data logger that has a resolution of 0.1 microvolts, is there such
a thing that doesn't cost the earth?

Use a preamp as close to the source as possible, shield it well, use
same alloy contacts to minimise thermelectric generation, and pray.