The Stacker Crane Shock Absorbers are self-contained and maintenance free and are designed for emergency deceleration of equipment such as automated storage and retrieval systems. During normal operation they provide only minimal resistance but under a higher speed emergency impact they provide smooth controlled deceleration thus preventing equipment damage. The SCS Series units are available with operating strokes up to 1200mm and are specially orificed to provide a smooth constant deceleration through-out their complete stroke length. The internal hydraulic pressure and thus the braking force, is maintained at a constant safe level to bring the fast moving load gently to rest in an emergency. Optional rod sensor available for indicating the complete extension of the piston rod.