A pressure sensor comprising a sensor body made at least in part of electrically insulating material, having a first face and a second face opposite to each other and an axial cavity, the axial cavity being closed at the first face by a corresponding diaphragm portion and having an opening at the second face, the cavity being designed to receive, through the opening thereof, a fluid the pressure of which is to be detected, the pressure sensor also comprising a circuit arrangement supported by the sensor body and including: - a first electrical-circuit pattern, there being connected to the first electrical-circuit pattern a plurality of first circuit components, amongst which detection means for detecting bending or deformation of the diaphragm portion; - a second electrical-circuit pattern, there being connected to the second electrical-circuit pattern at least one second circuit component (8; 8') having an active part, designed to be exposed to the fluid, and at least one first and one second connection terminal; - connection means (12a-13a, 12b-13b), which electrically connect the first electrical-circuit pattern to the second electrical-circuit pattern and that extend at least in an axial direction of the sensor body, characterized in that: the first electrical-circuit pattern comprises a plurality of respective tracks of an electrically conductive material (6a, 6b) deposited on the first face, on its side external to the cavity, and the second electrical-circuit pattern comprises a plurality of respective tracks made of electrically conductive material (10, 11) deposited on a region of the second face that surrounds at least partially the opening of the cavity, the tracks (10, 11) of the second electrical-circuit pattern comprise at least one first track defining a plurality of first pads and at least one second track defining a plurality of second pads, for connection of the first terminal and of the second terminal of the second circuit component (8; 8'), respectively, the first and the second tracks (10, 11) are prearranged in such a way that the first terminal and the second terminal of the second circuit component (8; 8') are connectable to any of the first pads and to any of the second pads, respectively, and/or to the first pad and to the second pad, respectively, of any of a plurality of pairs of first and second pads (10a, 11a). - a first electrical-circuit pattern, there being connected to the first electrical-circuit pattern a plurality of first circuit components, amongst which detection means for detecting bending or deformation of the diaphragm portion; - a second electrical-circuit pattern, there being connected to the second electrical-circuit pattern at least one second circuit component (8; 8') having an active part, designed to be exposed to the fluid, and at least one first and one second connection terminal; - connection means (12a-13a, 12b-13b), which electrically connect the first electrical-circuit pattern to the second electrical-circuit pattern and that extend at least in an axial direction of the sensor body, the first electrical-circuit pattern comprises a plurality of respective tracks of an electrically conductive material (6a, 6b) deposited on the first face, on its side external to the cavity, and the second electrical-circuit pattern comprises a plurality of respective tracks made of electrically conductive material (10, 11) deposited on a region of the second face that surrounds at least partially the opening of the cavity, the tracks (10, 11) of the second electrical-circuit pattern comprise at least one first track defining a plurality of first pads and at least one second track defining a plurality of second pads, for connection of the first terminal and of the second terminal of the second circuit component (8; 8'), respectively, the first and the second tracks (10, 11) are prearranged in such a way that the first terminal and the second terminal of the second circuit component (8; 8') are connectable to any of the first pads and to any of the second pads, respectively, and/or to the first pad and to the second pad, respectively, of any of a plurality of pairs of first and second pads (10a, 11a).