The new range of electromagnetic T50 rotary encoders has been designed for heavy duty engineering applications. They are already in operation for pitch control of rotor blades of wind turbines. The diameter of the housing is 50mm and the shaft is 12mm to withstand axial and radial loads up to 250 N. The units are available both as single-turn and multi-turn versions and with incremental, absolute or analogue output signals. The resolution is up to 13 Bits per revolution. SSI-serial, CANopen and Profibus interfaces can be supplied. Special items in stainless steel can be made available for use under aggressive ambient conditions, for example in maritime climates.