For lever arms, the actuator head ZCE01 (item number 447-3698) is also required. Universal Osiconcept. Osiswitch limit switches are available with fully interchangeable metal or plastic housings and fully interchangeable actuator heads. They are equipped with a normally closed and a normally open contact. Protection against ingress of liquids and dust up to IP66/IP67, and the switches meet the requirements according to EN50047. A variety of wiring options are available, and these switches typically save 40% of the time required to make electrical connections. The cable gland material must match the housing material. The housing dimensions correspond to the compact and miniature types in this series.