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This post was last edited by 18663069001 on 2017-8-23 at 15:55. Process and instrumentation are inseparable; to help everyone gain a better understanding of the basics of instrumentation, we have launched the \"One Question per Day\" campaign – just reply to view it. To encourage continued participation from everyone! Get a 3 Wealth reward just for participating! Higher rewards for correct answers! I hope everyone will participate actively, learn together, and make progress together! ! ! Multiple-choice question: 39. The greater the flow rate, the ( ) force acting on the target of a target flow meter will be. (A) Larger (B) Smaller (C) No effect (D) Cannot be determined. The answer to this question is A. Its working principle is as follows: when the medium flows through the measurement tube, its kinetic energy creates a pressure difference with the target plate, resulting in a force exerted on the target plate that causes it to move slightly. The magnitude of this force is proportional to the square of the medium’s flow velocity. The force acting on the target plate is transmitted through the target rod, causing a slight change in the elastomer of the sensor, thereby disrupting the balance of the bridge formed by the surface-mounted capacitors. A voltage signal corresponding to the force exerted by the flow rate on the target plate is generated: influenced by the characteristics of the fluid flow rate, the flow rate is proportional to the square of the voltage generated by the bridge.