The dynamics of a microsecond electric explosion of a tungsten wire in water is studied. A theoretical search for conditions of liquid wire radial uniformity is given. A new optical methods of temperature and radius measurements has been worked out. Mathematical modelling has been carried out to confirm the existence of radial uniformity and to compare the results with experimental and theoretical data. Conditions for the radial uniformity existence of liquid wire heating are presented; as tungsten uniform heating takes place at , one can use these regimes for investigation of the properties of liquid matter. The temperature dependence of liquid tungsten conductivity is given and compared with literature values. It is shown that vaporization begins with surface layers at chosen regimes of electric wire explosion.