{HEAD ~ The invention} is a device for representing changes in barometric pressure comprising an electronic barometric pressure sensor and a digital differentiating circuit in which a differential quotient ΔP/Δt is found which is connected to a display of {TAIL ~ the speed} of the change in barometric pressure with mathematical sign and numerical figure 
{ HEAD ~ The invention } is a device for representing changes in barometric pressure comprising an electronic barometric pressure sensor and a digital differentiating circuit in which a differential quotient ΔP / Δt is found which is connected to a display of { TAIL ~ the speed } of the change in barometric pressure with mathematical sign and numerical figure
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