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