Pressure sensor for fluids, having: - a cavity for receiving a fluid, the cavity being defined by a body and a diaphragm that can be deformed by the fluid pressure, - a pair of switches, each of said switches comprising a respective movable portion that can be switched between a first position and a second position, wherein the deformation of the diaphragm causes each movable portion to be positioned into the first position or into the second position, - an elastic means interposed between the diaphragm and the movable portions and configured for acting upon the diaphragm and the movable portions in order to influence the switching of the movable portions between the first position and the second position; wherein the elastic means is an elastically deformable leaf or plate; characterized in that said movable portions are capable of sliding parallel to each other; in that said sensor further comprises a support element interposed between the diaphragm and said leaf or plate for distributing the force exerted by said leaf or plate on a surface of the diaphragm; said support element supporting said leaf or plate; and in that said deformable leaf or plate has: - a central portion which rests on a central portion of the support element, and - two lateral portions adapted to abut or act against the two movable portions. - a cavity for receiving a fluid, the cavity being defined by a body and a diaphragm that can be deformed by the fluid pressure, - a pair of switches, each of said switches comprising a respective movable portion that can be switched between a first position and a second position, wherein the deformation of the diaphragm causes each movable portion to be positioned into the first position or into the second position, - an elastic means interposed between the diaphragm and the movable portions and configured for acting upon the diaphragm and the movable portions in order to influence the switching of the movable portions between the first position and the second position; wherein the elastic means is an elastically deformable leaf or plate; characterized in that said movable portions are capable of sliding parallel to each other; in that said sensor further comprises a support element interposed between the diaphragm and said leaf or plate for distributing the force exerted by said leaf or plate on a surface of the diaphragm; said support element supporting said leaf or plate; and in that said deformable leaf or plate has: - a central portion which rests on a central portion of the support element, and - two lateral portions adapted to abut or act against the two movable portions. wherein the elastic means is an elastically deformable leaf or plate; characterized in that said movable portions are capable of sliding parallel to each other; in that said sensor further comprises a support element interposed between the diaphragm and said leaf or plate for distributing the force exerted by said leaf or plate on a surface of the diaphragm; said support element supporting said leaf or plate; and in that said deformable leaf or plate has: - a central portion which rests on a central portion of the support element, and - two lateral portions adapted to abut or act against the two movable portions. - a central portion which rests on a central portion of the support element, and - two lateral portions adapted to abut or act against the two movable portions.