Well, I was curious and tried to do the calculation myself, when it occurred to me: uS/m? Why is it siemens per meter? The conductance should decrease with distance, so shouldn't it be ohms per meter or siemens*meters? What am I missing here?
Consider a cube of side
L, with electrical contacts on two opposite faces. The conductance increases with the cross-sectional area and decreases with the distance between faces. Thus:
(conductance) = (conductivity) x
L2 /
LSubstituting units of measure, we have:
S = S/m x m
2 / m