Pressure sensor and pressure sensor device having such pressure sensor

The invention relates to a pressure sensor for sensing the pressure of a fluid medium, the pressure sensor comprising: a housing having a first pressure connection and a second pressure connection, the first pressure connection having a first pressure channel to which a first pressure is applied and the second pressure connection having a second pressure channel to which a second pressure is applied; a first pressure sensing device arranged in the housing, arranged for loading a first pressure and for outputting a first electrical signal representative of a pressure difference of the first pressure with respect to a reference pressure; and a second pressure sensing device which is used for loading a second pressure and outputting a second electric signal representing the pressure difference of the second pressure relative to the reference pressure. It is proposed that the pressure sensor has a third pressure sensing device arranged in the housing, which is provided for applying the first pressure and the seco