Safety light-beam sensors, L41, L41S-11MA1A, System part: Sender, Safety level: PL e, SIL 3, Type 4, Scanning range: 7 m, Diameter: M18, Light source: LED, Type of light: Visible red light, Optical axis: Radial, Housing material: Nickel-plated brass, Connection type: Male connector M12, 4-pin