Thermal type flowmeter

Details Thermal type flowmeter Thermal type flowmeter

G - Physics

01

P

G01P 5/12 (2006.01) G01F 1/68 (2006.01) G01F 1/684 (2006.01)

Patent

CA 2044655

A heat-conductive stream pipe has an upstream side and a downstream side temperature-sensing element having resistance wires wound round the pipe at a certain distance there-between to assure that there will be no thermal affection with each other. A control means controls a bridge circuit including an earthen point at one end and a connecting point at the other end of each of the temperature-sensing elements so as to keep the temperature difference between the upstream side and the downstream side temperature-sensing elements at a constant level. An auxiliary heater adjustable in its temperature is placed on the stream pipe at the downstream side near the downstream side temperature-sensing element A mass flow of the fluid is determined by the voltage measured at the connecting point of the downstream side temperature-sensing element.

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