This work presents a wide revision of basic concepts associated to the multiphase flow (simultaneous flow of two or more fluids) in porous media as well as techniques of test and equipment s used in the determination of effective and absolute permeability in saturated and not saturated soils with water.With basis in this revision, and locking for the measure of saturated soils permeability submitted to flow of mixtures gasoline-alcohol, it was projected, built and placed in operation a system of flexible wall permeameters with suction control; a control software was developed and implementing an automatic system of monitoring of the electronic instrumentation used for measures of change volume, pressures and axial displacements of the soil samples; a flow pump system was implemented for application of constant rate in the permeability test, and systems of measurement of the volume of the liquids and gases were developed going by the sample under different pressure gradients.All the projected developments and implemented are described in detail. Characteristics of the used equipment s and calibration aspects of the electronic instrumentation and other accessories are discussed, trying to define workability limits, eventual deficiencies and techniques alternatives of testing involving the use of alcohol gasoline mixtures. Look in for evaluate the performance of equipment s and developed accessories, are presented and it is discussed results of an experimental program involving a) the use of samples of a inert soil, incompressible between levels of applied effective tensions,prepared in labortory using special techniques in way obtaining a repetitive structure, weakly cemented, simulating the residual soils of gnaisse; b) execution of constant rate test looking for the absolute permeability determination of saturated samples using as percolate fluids water, air, gasoline and alcohol; c) execution of constant rate test looking for the determination of the effective permeability to the water and the air of non saturated samples, submitted to constant suctions varying about 10 to 60 kPa.The obtained results indicate that the developed equipment and the implemented experimental techniques constitute versatile tools that make possible the direct determination of the absolute and effective permeabilities in way relatively simple and you trusted.