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Basic principle of magnetostrictive linear? displacement sensor

The magnetostrictive linear displacement (liquid level) transmitter is mainly composed of a measure rod, an electronic silo plus a non-contact magnetic ring (floating ball) for the measuring rod. The measuring rod provides you with magnetostriction wire (waveguide wire).

Through operation, an initial pulse is generated because of the electronic circuit in the electron chamber. The initial pulse is transmitted within the waveguide wire and any rotating magnetic field is generated over the direction of the waveguide cable.

When this magnetic discipline meets the permanent magnetic field within the magnetic ring (floating ball), the magnetostriction effect causes this waveguide wire to wiggle, making a wiggle pulse (or "return" pulse).
This wiggle pulse will be sensed and converted to the corresponding current pulse because of the energy pickup device installed inside the electronic chamber. The time difference between the beginning and return of both pulses can be calculated with the electronic circuit, and the measured position and displacement could be accurately measured.
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