GAS METER Russian patent published in 2008 - IPC G01F1/20 

FIELD: measuring equipment.

SUBSTANCE: gas meter includes case with inlet and outlet pipes, as well as oscillator with discrete flow elements and first piezo converter connected in series and mounted inside the case, and second piezo converter mounted over the case, differential amplifier, comparator, computation unit, LCD indicator. Direct input of differential amplifier is connected to output of first piezo converter, inverse input of differential amplifier is connected to output of second piezo converter, and output of differential amplifier is connected to comparator input, out put of which, in its turn, is connected to input of computation unit. Computation unit output is connected to LCD indicator.

EFFECT: increased jamming resistance of gas meter and extended measurement range for gas flow.

1 dwg