FIELD: aerodynamic experiment. SUBSTANCE: pneumatic ducts of differential pressure sensor are connected in turn to pressure tapping points. Output signal of sensor is multiplied by function of change-over of pneumatic ducts; the result of multiplication is filtered or integrated. Method is realized by means of device which is provided with differential sensor having pneumatic ducts. Output of sensor is connected to electronic amplifier-converter unit. Device is provided with two-position pneumatic selectors, periodic control signal generator, multiplier and integrator. Circuit of device ensures modulation of pneumatic signal being measured and demodulation (with accumulation) of converted electric signal. EFFECT: reduced additive error and hysteresis error. 3 cl, 4 dwg
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