SICK 6034871
SICK Safety single-beam sensors, L21, L21E-33MA2A, System part: Receiver, Safety level: Type 2, PL c, SIL1SILCL1, Scanning range: 60 m, Diameter: M30, Optical axis: Axial, Housing material: Nickel-plated brass, Connection type: Male connector M12, 4-pin