The basic principle of measurement is the movement of a magnet through the bobbin, changing the current circulating through it. It does not require an electrical contact between the mobile part and the bobbin, It is based on the electromagnetic coupling which makes it a very robust mechanically and prevents any influence of wear on the accuracy or measurement.
Depending on the distribution, it can be LVDT (linear variable displacement transformer) or LVD by a half-bridge meter. This distinction only affects the connection and measurement system.
We have many shapes and accessories for coupling and mechanical movement. Fasteners, various electrical connections etc.
Regarding the measuring ranges, they go between 2 mm and 400 mm.