Electrical – how to make a kelvin probe

probe

Simple question, I have to make a Kelvin probe. We need to find how to make one on the internet.

However, I don't know if there are other terminology, or if I'm searching in a wrong way, but I can't seem to find how to make one.

What would be a proper way to find models for this?

Best Answer

If you are talking about a Kelvin test lead- they work like a pair of clamps where each side of each clamp is brought out independently, sometimes back through four coaxial cables to four BNC connectors, sometimes just to banana plugs.

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The two sides of the clamp shown above are not connected together like they would be in an alligator clip- they are brought out to separate leads. The idea is that having separate force and sense connections allows the effects of contact resistance to be minimized.

A "Kelvin Probe" used in a Kelvin Force Probe Microscope is completely different. If this is what you are interested in you might want to look at the design of cantilever probes for Atomic Force Microscopy. I believe there are some DIY projects along this line.