A pressure sensor device comprising: a moulded device package arranged to define a cavity having an internal volume defined by an opening, a side wall and a base ; an elongate pressure sensor element having a proximal end and a distal end ; wherein the side wall is arranged to hold fixedly the proximal end of the pressure sensor element therein; the pressure sensor element comprises: a closed cavity therein; wherein the pressure sensor element further comprises: a substrate layer comprising a recessed portion formed therein, the recessed portion defining an open sensor element cavity portion; and a membrane layer disposed adjacent the substrate layer , the substrate layer and the membrane layer cooperating to close the open sensor element cavity portion and to define the closed cavity ; characterised in that the opening of the cavity is in fluid communication with the internal volume of the cavity ; the pressure sensor element comprising the closed cavity is held fixedly by the side wall so that the pressure sensor element is cantilever-suspended from the side wall within the cavity ; and the side wall and the base of the moulded device package are integrally formed. a moulded device package arranged to define a cavity having an internal volume defined by an opening, a side wall and a base ; an elongate pressure sensor element having a proximal end and a distal end ; wherein the side wall is arranged to hold fixedly the proximal end of the pressure sensor element therein; the pressure sensor element comprises: a closed cavity therein; wherein the pressure sensor element further comprises: a substrate layer comprising a recessed portion formed therein, the recessed portion defining an open sensor element cavity portion; and a membrane layer disposed adjacent the substrate layer , the substrate layer and the membrane layer cooperating to close the open sensor element cavity portion and to define the closed cavity ; characterised in that the opening of the cavity is in fluid communication with the internal volume of the cavity ; the pressure sensor element comprising the closed cavity is held fixedly by the side wall so that the pressure sensor element is cantilever-suspended from the side wall within the cavity ; and the side wall and the base of the moulded device package are integrally formed. a closed cavity therein; wherein the pressure sensor element further comprises: a substrate layer comprising a recessed portion formed therein, the recessed portion defining an open sensor element cavity portion; and a membrane layer disposed adjacent the substrate layer , the substrate layer and the membrane layer cooperating to close the open sensor element cavity portion and to define the closed cavity ; characterised in that a substrate layer comprising a recessed portion formed therein, the recessed portion defining an open sensor element cavity portion; and a membrane layer disposed adjacent the substrate layer , the substrate layer and the membrane layer cooperating to close the open sensor element cavity portion and to define the closed cavity ; characterised in that the opening of the cavity is in fluid communication with the internal volume of the cavity ; the pressure sensor element comprising the closed cavity is held fixedly by the side wall so that the pressure sensor element is cantilever-suspended from the side wall within the cavity ; and the side wall and the base of the moulded device package are integrally formed. <EOS>