This article provides an in-depth analysis of the accurate data acquisition principles of pulse output flow transmitters，covering the technical features of high-quality flow transmitters from Rosemount，Siemens and other brands。It compares in detail the performance differences of thermal，mass，explosion-proof and PTFE flow transmitters，and provides selection guidelines and typical application cases。Learn how to achieve ±0.5% high-precision measurement through pulse signals，avoid common usage misunderstandings，and master the development trends of intelligent flow transmitters in the IIoT era。