Gas turbine and method for operating the gas turbine

The turbine has an air intake (14), and a compressor (1) comprising a compressor flow channel (4). The compressor has a pre-conducting blade row (3) with pre-conducting blades. A freezing-up sensor unit (17) has a sensor e.g. temperature sensor (8) and pressure sensor (7), arranged a compressor moving blade row (5) and a compressor guide vane row (6). The moving blade row is arranged in the flow channel directly downstream of the pre-conducting blade row, and the guide vane row is arranged directly downstream of the moving blade row. An independent claim is also included for a method for operating a gas turbine.