FIELD: measuring equipment.
SUBSTANCE: invention relates to volumetric flow rate measuring devices, in particular, to electronic units of vane water meter. Invention consists in that electronic unit of vane water meter additionally comprises second Hall sensor located above path of impeller magnets diametrically opposite to first Hall sensor, wherein Hall sensors along power circuit are in-series connected to output of microcontroller and current-limiting resistor, first outputs of Hall sensors are connected to each other, second outputs are to inputs of instrument amplifier, feedback resistor of hysteresis circuit of comparator is connected to output of microcontroller, power circuits of Hall sensors and circuit elements are connected to outputs of microcontroller.
EFFECT: possibility to compensate for influence of external magnetic field on meter readings, reduction of current consumption of electronic unit.
1 cl, 1 dwg
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