IFM Efector MK5208Product Attribute Attribute Value Connection 0. 3 m PUR Cable; M8 Connector IP Rating IP79 Output NO Type MK5208 Overview Cylinder sensors are used to detect the open and closed position of pneumatic cylinders. They are attached to the cylinder and sense the internal ring magnet attached to the cylinders piston. The housing wall of the cylinder must be constructed of a non ferrous material (e. g. aluminum, brass or stainless steel). ifms cylinder