Another sensor from TWK joins the now long list of SIL2/PLd certified sensors: The newly developed NBT-D/S3 rotor hub sensor with PROFINET interface. The sensor, which was primarily developed for wind turbines, measures the speed of the rotor so that the user knows the operating status of his turbine at all times. Due to the functionally safe design of the sensor, he can trust the output signal of the NBT at any time and design his control concept accordingly. Installation in the rotor is extremely simple and cost-effective: no connection to a drive shaft is required. Instead, it can be placed anywhere near the axis of rotation.