Deep-well thermal flowmeter

摘要

The flowmeter includes a planar wire grid immersed in the fluid flow perpendicular to the direction of fluid flow. Capacitors discharge an electrical current through the wire grid to heat the wire grid and thereby produce, by heat conduction, a thermopulse in the fluid. Temperature detectors are provided on both sides of the wire grid to detect the thermopulse. A timing device is provided for measuring the time interval between production of the thermopulse and detection thereof by the detectors. The time interval is representative of the flow rate of the fluid flow.