Sensor device for a wind turbine

A sensor device (200) for use on a wind turbine (100) is described. The sensor arrangement (200) comprises rotor blade related sensors (202, 204, 206, 208, 210) and non-rotor blade related sensors (212, 214, 216) arranged in/on the rotor blade, wherein sensor signals associated with the rotor blade related sensors are processed by fusion of sensor signals associated with the non-rotor blade related sensors. The invention relates to a method (400) for operating a wind turbine (100).