Total pressure cells are designed for the measurement of total pressures in soils and at the soil–structure interface, enabling direct monitoring of the stress state in geotechnical and infrastructure works. Total pressure measurement includes both the soil effective stress component and pore water pressure, providing a fundamental parameter for evaluating the geomechanical behavior of the soil–structure system. The cells consist of two steel plates welded along the perimeter and separated by a cavity filled with degassed hydraulic fluid: pressures applied to the cell surface generate a change in internal pressure, which is detected by a transducer and converted into an electrical signal. Thanks to robust construction, high sensitivity, and long-term stability, total pressure cells represent a reliable solution for continuous monitoring of embankments, foundations, and retaining or containment structures, even under harsh environmental conditions.