In 1680, Dutch scientist Hoynes was inspired by the principle of cannons and invented rodless guided cylinder. At first, he only hoped to use the pressure generated by the explosion to drive the machine. As people improved the use of rodless piston, a magnetic ring was added to the rodless pneumatic cylinder price piston, and the position of the magnetic ring was detected by a magnetic switch attached to the small rodless cylinder cylinder wall, thereby detecting the relative position of the piston rod movement; it plays the role of positioning, limit control, automatic protection, counting, etc. Today, magnetic switches and stainless steel rodless cylinder are matched and widely used in hundreds of fields such as robots, automation equipment, medical equipment, transportation, etc.