Abstract: The invention is a device for representing changes in barometric pressure comprising an electronic barometric pressure sensor 2 and a digital differentiating circuit in which a differential quotient .DELTA.P/.DELTA.t is found which is connected to a display of the speed of the change in barometric pressure with mathematical sign and numerical figure. The electrical supply for said barometric pressure sensor 2 is obtained in cyclical intervals. The cyclically determined measured barometric pressure values are checked for plausibility, only the plausible measured barometric pressure values being used to find the differential quotient .DELTA.P/.DELTA.t.