A method for determining the thermal state point of the steam in steam turbines and measuring arrangement for carrying out the method

The invention relates to a method for determining the thermal state point of the steam in steam turbines and a measuring arrangement for carrying out the method. According to the invention, a spectroscopic measurement and evaluation by transmission of infrared light through a sample chamber acted on by steam (5) is carried out of the steam turbine, at the same time be determined vapor mass fraction and steam temperature. The method enables a continuous, locally resolved determination of the state variables and thus of the thermal state of point without flow restriction or Dampfabzapfung.