VORTEX FLOWMETER ( VARIANTS ) Russian patent published in 2003 - IPC

FIELD: measurement f flow rate with use of Karman vortexes. SUBSTANCE: vortex flowmeter includes instrument converter of electric signals, case with circulation conduit for liquid medium which houses streamlined body and pick-off unit of electric signal with sensor, two electrodes and holder of both or one electrode alone. Sensor comes in the form of elastically deformed shell of dielectric material anchored on surface of electrode holder with formation of space filled with current-conducting liquid or in the form of ring made of material displaying conduction unequal to conduction of liquid medium, mounted on electrode holder for displacement relative to it. In compliance with second variant second electrode is located on case, outside of zone of vortex generation. Electrode holder and sensor are positioned either after streamlined body or in chamber made in it communicating with various zones of region of vortex generation. EFFECT: simplified design, increased noise immunity under operating conditions both in current-conducting medium and in medium that does not conduct current. 7 cl, 16 dwg