TER has acquired decades of experience in designing and manufacturing rotary limit switches, providing now four series of rotary limit switches, used to control the movement of industrial machinery when in need of measuring the movement on the basis of the rotation angle and/or of the number of shaft revolutions. rotary limit switches are used in particular in industrial and construction lifting plants to control gantry cranes, track cranes, jib cranes, wall-mounted jib cranes, tower cranes and winches for construction sites; in the automation industry to command and control systems to manage machines and processes, thus reducing the need for human intervention; in stage technology to control the equipment used to move stage sets, curtains etc.; on wind turbines for managing and controlling the pitch angle of the blades (pitch control) and the position of the nacelle (yaw control).