Abstract: A geotechnical or geophysical probe (50) of the type including a central probe body (1) for supplying one or more fluids (G, L) using one or more fluid (G, L) supply ducts (40, 41), at least one probe member (21, 22, 23) adjacent to the probe body (1), characterized in that it includes a substantially non-deformable tank (53) for containing additional volumes (Vg, Vl) of a first fluid (L) and a second fluid (G), the volume (Vl) of the first fluid of the tank (53) communicating with at least one first supply duct (40) and the volume of the second fluid (Vg) of the tank (53) being at least connected to a second supply duct (41), wherein the ducts (40, 41) are provided in a solid area of the probe body (1).

Abstract: A device (1) for protecting a geotechnical or geophysical probe (13) having an elongated shape and capable of undergoing radial deformation, includes: a plurality of flexible members (2) having an elongated shape and capable of undergoing radial deformation in a functional configuration of the device (1); elements for the longitudinal compensation of the radial deformation of the flexible members (2) in a functional configuration of the device (1); two flexible member bearings (301, 302) each receiving an end of the flexible members (2), the bearings (301, 302) being capable of longitudinal movement on the probe (13) so that the flexible members (2) longitudinally protect the outer portion of the probe (13) between the bearings (301, 302) in a functional configuration of the device (1).

Abstract: The invention relates to a probe intended to be fitted to a pressure meter and including a fluid dispenser (1), a central measuring cell (21) suitable for being inflated by a pressurized liquid, and two boundary cells (22, 23) arranged on either side of the measuring cell and suitable for being inflated by a pressurized gas. According to the invention, the cells (21-23) are made from a single resilient sleeve (2) sheathing a hollow cylindrical mandrel (3) removably and sealingly fitted onto the dispenser (1), which dispenser has to this end an external surface in the shape a cylinder.

Abstract: A pressure meter includes a probe (1) and a piece of surface equipment (2), an inflatable sleeve (11), a non-deformable reservoir (4) containing a gas (G) and a liquid (L), a pressurized-gas source (21), various ducts (31, 32), gas-flow control elements (220-222), a pressure sensor (5), and a volume sensor. According to the invention, the reservoir (4) is supported by the probe, the gas flow is controlled by a nozzle (221) and a valve (222), and this pressure meter additionally includes pressure control members (7, 8) designed to open the valve (222), when establishing each new pressure level at a setpoint pressure (Kpi), for a time period (Tpi) corresponding to this setpoint.