Hi, I'd like to measure the length of a rod (made of iron; diameter: a few millimetres; length: 5 cm) is extending into a field coil. So I can imagine there is an exploring coil which detects the signal from the field coil. The signal in the measuring coil is changed depending on the length of the…

iron rod penetrating field coil

jremington December 8, 2015, 6:19pm 2

Only an AC excitation signal will work. The response would probably be rather nonlinear.

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