Patent ID: 10591375

Abstract:
A pressure sensor is provided, the sensor comprising an inlet for connecting to a body of gas; a diaphragm assembly comprising a first diaphragm and a second diaphragm, the first and second diaphragms defining a chamber therebetween, the chamber being connected to the inlet; a first transducer responsive to movement of the first diaphragm and operable to produce a first electrical signal in response to the same; and a second transducer responsive to movement of the second diaphragm and operable to produce a second electrical signal in response to the same; and an amplifier disposed in the chamber of the diaphragm assembly and connected to the first and second transducers to receive the first and second electrical signals therefrom. A movement sensor assembly for detecting movement of a person is also provided, the assembly comprising a flexible vessel containing a body of gas and a pressure sensor according to any preceding claim, the sensor being arranged to detect changes in the pressure of the gas within the flexible vessel.