HEAT FLOWMETER Russian patent published in 1999 - IPC

FIELD: measurement technology. SUBSTANCE: heat flowmeter includes two identical converters placed in sockets of chambers of case. Temperature sensitive resistor of first converter is located in main conduit made in case and that of second converter is positioned in neck of narrowing member in the form of Venturi tube. Temperature sensitive resistors are fabricated from wire and are placed on surfaces of thin-walled metal tubes. Chamber that accommodates second converter is connected to main conduit through additional conduit and space of thin- walled metal tube. Electric current providing for constancy of temperature difference of converters is supplied to second converter in process of measurement. EFFECT: enhanced measurement accuracy in wide range of flow rates thanks to increase of output electric signal and simultaneous decrease of time needed to pass to operating condition. 1 cl, 2 dwg