Orifice flow meters dominate the industrial steam flow measurement field due to their simple structure, high reliability, and wide applicability. However, the high temperature and phase-change characteristics of steam present significant challenges in the stable transmission of differential pressure signals. As a key component in the pressure pipe system, the proper setup of the condensate […]
In a Distributed Control System (DCS), deadband (also known as hysteresis) refers to a specific range configured around an alarm setpoint. Within this range, minor fluctuations of a process variable will not trigger an alarm, even as they approach the alarm limit. The deadband acts as a “no-alarm zone,” effectively preventing the frequent generation of
Understanding Deadband in DCS: A Practical Guide to Alarm Management Read More »
In modern industrial and home automation, relays play a crucial role by responding to electrical signals to open and close contacts, thus enabling the control of electrical circuits. Relays are essential components that ensure the smooth operation of complex systems, providing safety, efficiency, and reliability. For anyone working in automation systems, understanding the various types
Why Relays are Essential in Automation Systems Read More »
Radar level transmitters are widely used in various industrial applications, utilizing microwave-based distance measurements to assess the liquid level in tanks and containers. Among all the selection parameters, the dielectric constant (εr) of the medium is one of the most critical factors influencing radar performance. 1. What is Dielectric Constant and Why is it Important?
The Crucial Role of Dielectric Constant in Radar Level Measurement Read More »
Complete control systems are the core units in industrial production, with the PLC serving as their “brain.” The stable operation of equipment like compressors, pump sets, and sewage treatment plants depends on it. Choosing the wrong PLC, improper installation, or inadequate maintenance can lead to system failures. In this article, we’ll discuss the essential technical
Key Technical Points of PLC in Control Systems Read More »
The working principle of electromagnetic flow meters is based on Faraday’s Law of Induction: when a conductive fluid flows through a magnetic field, it cuts through the magnetic flux lines, generating an induced electromotive force (EMF). The magnitude of this EMF is proportional to the flow velocity, which is then used to calculate the flow
Effects of Scaling on the Measurement Parameters of Electromagnetic Flow Meters Read More »
1. Core Principle (Kármán Vortex Street) When fluid flows past a non-streamlined vortex generator, alternating vortices are formed on either side, arranged in a regular pattern (Kármán Vortex Street). Vortex shedding frequency: f=St×vdf = St times frac{v}{d} StSt : Strouhal number (approximately 0.16–0.22, stable within Reynolds number 2×1032 times 10^3 to 7×1067 times 10^6 )
Vortex Flowmeter Sensor Explained Read More »
Process engineers often compare the inlet and outlet flow rates of equipment, devices, or pipelines to ensure the stability, safety, and efficiency of production. The key reasons for this practice can be explained from the following perspectives: 1. Verifying Material Balance to Ensure Process Stability In industrial production, the input-output-accumulation of materials in equipment or
Why Process Engineers Frequently Check the Inlet and Outlet Flow Rates Read More »
A Common Field Troubleshooting Guide “The liquid level is dropping, but the pressure transmitter is showing an increase in pressure!” This seemingly paradoxical situation is a common issue encountered by process engineers and instrumentation maintenance personnel. It not only affects the accuracy of production data but can also mislead operational decisions and pose safety risks.
Why Does Pressure Increase When the Liquid Level Drops? Read More »
In industries such as chemicals, oil and gas, and powder processing, level measurement instruments are not just simple tools. They play a key role in control systems while ensuring safety in hazardous areas. Many accidents are not caused by equipment failure but occur because a critical issue was overlooked during the selection process — whether
Level Measurement Instruments for Explosion-Proof Environments: A Selection Guide Read More »
