Patent ID: 6564629
Filing Date: 2003-05-20
Classification: G01F

Abstract:
A device for measuring the flow of a fluid located in a fluid channel, the device comprising: a metallic tube of a predetermined thermoelectric potential, the metallic tube being connected to form a part of the fluid channel, the metallic tube including a partial section; an a.c. power source connected to the partial section of the tube heating the partial section as a resistor element to an increased working temperature compared with the temperature of the fluid; at least one thermocouple including junctions formed in an area of the partial section and wires, with another thermoelectric potential, connected to the tube; a measuring circuit for evaluating a thermocouple voltage of the thermocouple with a circuit for eliminating the a.c. voltage component superimposed to the thermocouple voltage as a consequence of the a.c. heating the thermocouple voltage providing a measured variable corresponding to the flow.