Patent ID: 8224588

Claim:
A method for determining the water conductivity of a multi-component mixture of gas and at least one liquid containing water in a pipe, the method comprising the following steps: a. performing electromagnetic phase or loss measurements at at least two measurement frequencies within the range of 1 MHz to 10000 MHz in said pipe near the pipe wall at a first location where said mixture predominantly contains gas and at a second location where said mixture predominantly contains liquid, b. determining the temperature of the multi-component mixture, c. calculating using a computer and a mathematical program the ratio between at least one of the loss or phase measurements from said first location and the corresponding one of the loss or phase measurements from said second location, and d. determining the conductivity of the water contained in the multi-component mixture based on the temperature determined in step b, an empirically determined relationship between the ratio calculated in step c and the conductivity of water.