I just received these very diminutive mercury switches and thought they might be useful for some of you. I can't say I have ever seen them this small. The seller does not provide specifications so I don't know what the current handling capacity is, but since these are probably destined to pull a GPIO up or down that's not really a concern.
A four wire measurement says they are about 40mΩ closed and the Fluke 287 reads about 0.05nS open. They should find a use where normal microswitch limit switches won't work.
[EDIT: fixed the conductance measurement which was off by an order of magnitude]
A four wire measurement says they are about 40mΩ closed and the Fluke 287 reads about 0.05nS open. They should find a use where normal microswitch limit switches won't work.
[EDIT: fixed the conductance measurement which was off by an order of magnitude]
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