Checking turbine cavitation erosion in an overhaul assesses a total effect. In order to find out which turbine operating conditions contribute most, vibro-acoustical diagnostic tests or monitoring are necessary. Simple tachniques for these tasks yiled unreliable and even false results. Korto uses an advanced multidimensional technique which yields reliable estimates of the running cavitation intensity (for operation optimization), the accumulated erosion (for maintenance optimization), and details of cavitation (turbine improvement). We make prototype tests and deliver cavitation monitoring systems. See more at: www.korto.com. Contact me at korto@korto.com or Skype korto.cavitation.