LVDT (Linear Variable Differential Transformer) sensor has very stable output signal due to its differential transformer design. The LVDTs are designed for a wide range of industrial and scientific position feedback or measurement applications. Their most advantage is high repeatability once configured. LVDT shows the exact same measurement on restarting after power outage, therefore, no positional information will be lost. Furthermore, apart from the uni-axial linear motion of the magnetic core, any other movements such as the rotation of the core around the axis will not affect its measurements as the moving core does not contact the inside of the stainless steel housing tube and it moves without friction, thus, making the LVDT a highly reliable target contact-type sensor. The absence of any sliding or rotating friction allows the coil windings to be sealed against the hostile environments.