A pseudo differential pressure sensor comprising: a first absolute pressure sensor; and a second absolute pressure sensor (10"), wherein each of the first and the second absolute pressure sensors comprises: an elastically deformable membrane configured to deform in response to exposure to an environment having a pressure; a first piezoresistor located on the elastically deformable membrane at a first region where increasing the pressure of the environment produces an increasing tensile strain in the first piezoresistor; and a second piezoresistor located on the elastically deformable membrane at a second region where increasing the pressure of the environment produces an increasing compressive strain in the second piezoresistor, and wherein the first and the second piezoresistors of both the first and the second absolute pressure sensors are electrically connected as a Wheatstone bridge having a first voltage divider leg and a second voltage divider leg, and characterised in that, the first voltage divider leg consisting of the first piezoresistor of the first absolute pressure sensor series connected to the first piezoresistor of the second absolute pressure sensor at a first output node, the second voltage divider leg consisting of the second piezoresistor of the first absolute pressure sensor series connected to the second piezoresistor of the second absolute pressure sensor at a second output node. a first absolute pressure sensor; and a second absolute pressure sensor (10"), wherein each of the first and the second absolute pressure sensors comprises: an elastically deformable membrane configured to deform in response to exposure to an environment having a pressure; a first piezoresistor located on the elastically deformable membrane at a first region where increasing the pressure of the environment produces an increasing tensile strain in the first piezoresistor; and a second piezoresistor located on the elastically deformable membrane at a second region where increasing the pressure of the environment produces an increasing compressive strain in the second piezoresistor, and wherein an elastically deformable membrane configured to deform in response to exposure to an environment having a pressure; a first piezoresistor located on the elastically deformable membrane at a first region where increasing the pressure of the environment produces an increasing tensile strain in the first piezoresistor; and a second piezoresistor located on the elastically deformable membrane at a second region where increasing the pressure of the environment produces an increasing compressive strain in the second piezoresistor, and wherein the first and the second piezoresistors of both the first and the second absolute pressure sensors are electrically connected as a Wheatstone bridge having a first voltage divider leg and a second voltage divider leg, and characterised in that, the first voltage divider leg consisting of the first piezoresistor of the first absolute pressure sensor series connected to the first piezoresistor of the second absolute pressure sensor at a first output node, the second voltage divider leg consisting of the second piezoresistor of the first absolute pressure sensor series connected to the second piezoresistor of the second absolute pressure sensor at a second output node.