This article provides a detailed analysis of 5 common faults of the DLT200 pressure transmitter and diffused silicon HESMANN pressure sensor, including abnormal output signals, zero drift, medium crystallization, mechanical vibration, and lightning damage. It offers professional solutions and preventive measures to help technical personnel quickly diagnose and handle faults, ensuring the stable operation of flow control systems. It covers key technical points of models such as A-10, 501, and FDS-S, and is suitable for equipment maintenance personnel in petroleum, chemical, and other industries.