The Sendix Heavy Duty H120 encoders with the special HD-Safety-Lock structure have been designed for the accurate determination of the rotary speed of wind turbine generators and for large AC motors, e.g. on cranes and in the steel industry. Kübler's Heavy Duty family is now available for a wide variety of applications. Resistant materials, incl. seawater resistant housing, wide temperature ranges from -40°C to +100°C and a high protection level (IP 66 + IP 67) as well as a high shock (2000 m/s2, 6 ms) and vibration resistance (150 m/s2, 10 ...2000 Hz) ensure they remain unaffected by the harshest environmental conditions. The connection technology enables simple quick installation. There are three shaft attachment solutions: 1. Tapered hollow shaft 1:10 with central fixing - for highly accurate direct connection to the application shaft. 2. Cylindrical blind hollow shaft Ø 12 mm or 16 mm with central fixing - the standard mounting solution for generators. 3. Through hollow shaft from Ø 16 mm to 28 mm.