1. Introduction Resistance Temperature Detectors (RTDs), such as the widely used Pt100, are temperature sensors that exploit the predictable change in electrical resistance of a metal (typically platinum) as temperature varies. By measuring the resistance of the RTD element, one can accurately determine temperature. A temperature transmitter supplies a known excitation current to the RTD […]
Temperature sensors are fundamental components in industrial instrumentation systems, especially in chemical plants where process control and safety heavily rely on precise temperature monitoring. These sensors convert thermal energy into electrical signals using various physical principles and are widely classified based on their construction, sensing material, and measurement method. This article explores four commonly used
Understanding Four Key Types of Temperature Sensors in Chemical Process Automation Read More »
1. Definition of Accuracy and Range Accuracy Class:Refers to the maximum permissible error as a percentage of the full-scale range.For example, a gauge with an accuracy of Class 1.0 means the measurement error is within ±1% of its full range. Measurement Range:Indicates the span between the minimum and maximum measurable pressure.E.g., a 0–10 MPa gauge
Understanding Pressure Gauge Accuracy and Range: A Practical Guide Read More »
Explosion-proof systems, especially in hazardous environments, demand a meticulous approach to ensure safety and compliance with regulations. This article outlines the essential principles for connecting explosion-proof distribution boxes with galvanized pipes, providing practical details and best practices for effective implementation. 1. Requirements for Explosion-Proof Piping Installation The installation of explosion-proof pipelines requires higher standards compared
Principles for Connecting Explosion-Proof Distribution Boxes and Galvanized Pipes Read More »
Instrument air (IA) is a critical utility in industrial environments, providing clean, dry, and stable compressed air to pneumatic instruments, control valves, and other automation devices. Proper management and maintenance of the instrument air system are essential for ensuring the reliability and longevity of your equipment. Basic Requirements for Instrument Air Pressure Range:Typically maintained at
Best Practices for Using Instrument Air Systems in Industrial Facilities Read More »
PID control is one of the most commonly used strategies in industrial automation for precise process control. A PID controller adjusts system output by computing the error between a desired setpoint and a measured process variable. This adjustment is governed by three core parameters: Proportional (P), Integral (I), and Derivative (D). Understanding the function of
Understanding the Roles of P, I, and D in PID Control Read More »
In the field of industrial automation, many engineers—including myself—often wonder: How should a control optimization project truly be executed? After years of hands-on experience, countless project iterations, and learning from industry veterans, I have developed a clearer understanding of the guiding principles. While this is not a definitive methodology, these insights have significantly improved both
Five Fundamental Principles for Control Optimization Projects Read More »
From the perspective of process operations, automatic control systems can significantly reduce manual intervention while enhancing safety and efficiency. Consequently, organizations generally strive to implement automatic control wherever possible. However, in practice, many installations fail to achieve the desired level of automation due to various constraints. Simply focusing on increasing the automation rate through performance
Realistic Considerations for Avoiding Automatic Control Read More »
Modern industrial automation has evolved significantly from basic single-loop control to advanced, multi-loop control systems. In practice, processes often require more sophisticated control methods due to dynamic interactions, non-linear behaviors, and varying disturbances. This article explores six widely used types of complex control loops, highlighting their principles, structures, benefits, and typical applications. 1. Cascade Control
Advanced Process Control Strategies: Six Types of Complex Control Loops Read More »
In industrial automation projects, Distributed Control Systems (DCS) serve as the backbone of plant operations. Proper planning for I/O (Input/Output) modules and controller spare capacity is critical for ensuring system scalability, reliability, and maintenance flexibility. Overlooking this aspect can result in serious challenges during plant expansion or system upgrades. This article provides a detailed guide
How Much Spare Capacity Should Be Reserved for DCS I/O Modules and Controllers? Read More »
