In order to understand the countless variables governing Municipal Solid Waste (MSW) stress-strain-strength behavior, much has been done in laboratory in the attempt of modeling what in fact happens inside the waste cells, with several levels of successes and failures. However, difficulties in obtaining undeformed samples or in preparing samples that represent real field conditions, given the high rank of heterogeneity in MSW landfills, could be limiting factors. On the other hand, direct field investigation techniques bring along great potential in obtaining in situ real information about an environment that is highly heterogeneous and time dependent. Unfortunately, operational and interpretation difficulties are limiting factors to a more common use of such techniques. One of these techniques is the Pressuremeter, which, despite of being already successfully applied in soils, has not been fairly used in MSW, particularly in Brazil which it has not been tested yet. Considering this gap, this research deals with the construction of a new full displacement pressuremeter and its application in MSW investigations. Unlike the prebored and self-boring techniques, the pressuremeter developed here can be directly pushed in the underground. During its construction and assembly stages a system to measure radial displacements was conceived, which makes use of Hall effect sensor in order to measure higher cavity strains. These systems are mounted along the probes` length in orthogonal directions in order to evaluate the membrane behavior during expansion, therefore accounting heterogeneity and anisotropy in MSW landfills. The application of such pressuremeter was carried out in the Muribeca (PE) landfill, where 16 pressuremeter tests were carried out along with standard penetration test, cone penetrometer tests and laboratory analyses, whose results were interpreted with conventional methodologies providing mechanical waste properties.