1. Working Principle of Vortex Flowmeters Vortex flowmeters operate based on the Kármán vortex street principle. The core mechanism involves detecting the frequency of vortices generated in the fluid to calculate the flow rate. Vortex Formation: In a pipeline, a non-streamlined body (such as a cylindrical or triangular pillar) is placed. As the fluid flows […]
A differential pressure transmitter is a widely used instrument in industrial processes. As part of the process control system, it converts the differential pressure (pressure), flow, level, and other process parameters of liquids, gases, or steam into standardized output signals (such as 4-20mA current). These signals are used as input for display instruments, controllers, and
Differential Pressure Transmitter: Dry and Wet Capillary Connections Read More »
Key Components of a Positive Displacement Flowmeter A positive displacement (PD) flowmeter is composed of several essential parts, each serving a distinct function: Measuring Section: This is the core of the flowmeter, consisting of a rotor, housing, and cover plate that form the measurement chamber. When fluid passes through, the rotor spins continuously, with the
Understanding Positive Displacement Flowmeters: From Structure to Installation Read More »
Manufacturing Execution Systems (MES) play a crucial role in bridging the gap between enterprise-level planning (ERP) and real-time shop-floor operations. By integrating with field instruments, PLCs, and automation devices, MES provides full visibility, traceability, and control across the entire production cycle. This article outlines the key functional modules of an MES system and explains how
MES System and Its Functional Modules: How MES Connects with Field Instruments Read More »
Ultrasonic flow meters are highly convenient instruments, particularly suitable for measuring flow rates in large-diameter water supply pipelines. Portable ultrasonic flow meters, in particular, offer the advantage of non-invasive measurement by attaching probes to the external surface of pipes, allowing flow rate measurement without interrupting or damaging the existing pipeline. This has made them increasingly
Common Issues to Avoid When Using Ultrasonic Flow Meters Read More »
The proper selection of instrument signal cables and explosion-proof flexible conduits is crucial in ensuring signal integrity, operational safety, and compliance with relevant standards, particularly in industrial and hazardous environments. This article provides a detailed guide on choosing the right components for your application. I. Instrument Signal Cable Selection Instrument signal cables are used to
Selection of Instrument Signal Cables and Explosion-Proof Flexible Conduits Read More »
RS-485 is one of the most widely used serial communication standards in industrial automation, building control, and security systems. It uses differential signaling, which provides excellent noise immunity and allows multiple devices to share the same bus in a half-duplex topology.Under ideal conditions, RS-485 communication can reach up to 1,200 meters, but actual distance is
Five Practical Methods to Prevent RS-485 Signal Attenuation Read More »
In daily process control operations, periodic oscillations act like an “invisible killer” to equipment health. Even attenuating oscillations subtly accelerate valve wear and other issues. Accurately identifying the type of oscillation, quickly pinpointing its source, and implementing effective solutions are key to improving automation levels and operational stability. This article delves into the identification patterns
Identifying and Eliminating Oscillations in Control Systems Read More »
A Practical Engineering Guide for Process Automation and Instrumentation Systems In industrial automation—especially in plants involving hazardous areas, field instrumentation, and PLC/DCS systems—two devices frequently appear in the same cabinet: intrinsically safe barriers (safety barriers) and signal isolators.Although their appearance and wiring layout may look similar, their engineering purposes, operating principles, and compliance requirements are
Safety Barriers vs. Signal Isolators: Do You Really Know the Difference? Read More »
Vortex flowmeters are widely used instruments for measuring flow in various industries, leveraging the principle of vortex shedding. The wiring methods for these flowmeters vary depending on the type of output signal (analog, digital, or pulse) and the operational environment. Below is a detailed discussion of the most common wiring methods. 1. Two-Wire Connection (4-20mA
Detailed Explanation of Common Wiring Methods for Vortex Flowmeters Read More »
