Actuator head for position switch 3SE51 roller lever Metal lever with plastic roller 22 mm functional at -40 °C Actuator head for position switch SIRIUS 3SE5 for position and location detection of machine parts and position monitoring of protective devices for extreme environmental conditions down to -40 °C, e.g. in wind turbines, in the food industry or for railway applications. Due to their high degree of protection, the devices are suitable for use in extreme environmental conditions. They have increased corrosion protection, are shock and vibration tested and approved worldwide (IEC, UL). With the appropriate switch configuration, the highest safety requirements according to PL e or SIL 3 can be met. Various housing sizes in plastic or metal are available. Versions with a separate actuator or with guard locking are also available. Depending on the version, various drives and separate actuators are available as accessories. Safety is a SIRIUS business.