Turck's LI-Q17 is the first miniature linear displacement sensor, measuring around 50 and 200 mm, which unifies all positive qualities of traditional measuring systems without any incoveniences. It functions with the resonant circuits measuring principle wherein the object's location is observed through an inductive oscillating system, including a coil and a condenser. It is the only sensor of its kind enabling it to work where functionality of a magnetic position instrument is immensely affected by welding plants and large motors resulting to electromagnetic fields.