The mechanical sensing of linear motion is provided by a front guided or loose push rod. LVDT linear sensor versions are available as spring-suspended probe tip (RACT) with internal spring return, with a guided push rod (RACC) on which ball joints can be mounted and with a loose push rod (RACL). All types are supplied with an AC voltage and provide an AC voltage output that is corresponding to the displacement of the core. The inductive measuring principle of the RAC is configured in LVDT coil. The non-contact measurement principle provides a long life and allows high dynamic applications, especially where small oscillating movements need to be detected.