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Understanding Instrument Tag Numbers in Industrial Automation

Instrument tag numbers, often referred to simply as tag numbers, are unique identifiers assigned to instruments and devices used in industrial processes. They play a crucial role in system design, implementation, and maintenance by providing a consistent and logical means of identifying and referencing instruments in technical documentation, control systems, and field operations. Components of […]

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Differences Between Electric Contact Pressure Gauges and Remote Transmission Pressure Gauges

Pressure gauges are essential devices in industrial systems to monitor and manage pressure levels. Among the various types, electric contact pressure gauges and remote transmission pressure gauges stand out due to their unique features and functionalities. Despite their shared purpose of pressure measurement, they differ significantly in their principles, applications, and advantages. Below is a

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Key Considerations for Instrument Installation in Toxic, High-Temperature, and High-Pressure Oxygen-Enriched Environments

During instrument installation, engineers often face environments unsuitable for safe equipment setup, such as explosive, flammable, cold, dusty, high-humidity, and regions with strong electrical or magnetic fields. In these environments, specific precautions must be taken to ensure safety and compliance. Installation in Toxic Environments When installing instruments in environments with toxic media, careful attention to

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The Key Functions and Applications of Explosion-Proof Junction Box Breather Valves

Explosion-proof junction box breather valves play a critical role in industrial environments, especially in areas where flammable or explosive gases are present. Below are the key functions of breather valves in explosion-proof junction boxes: 1. Maintaining Pressure Balance During operation, the internal pressure of an explosion-proof junction box may fluctuate due to temperature changes, heat

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Understanding Limestone Wet Desulfurization Technology

Limestone wet desulfurization technology has long been the mainstream in various industries, not only because the equipment is “robust” and efficient but also because it can maintain relatively stable performance under varying loads, coal qualities, and operating conditions. Engineers who only focus on surface-level processes, such as “spraying, reaction, and gypsum output,” may often be

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Understanding Steam and Its Measurement

Steam, as a critical energy carrier, finds extensive application in industrial heating, power generation, and production processes. This article provides a comprehensive overview of steam types, quality, measurement methods, common challenges, and associated instruments. 1. Types of Steam Steam can be classified into several types based on its pressure, temperature, and state: Saturated Steam Produced

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Understanding the Working Principle of Thermocouples and Common Measurement Issues

1. Working Principle of Thermocouples A thermocouple operates based on the Seebeck effect (thermoelectric effect). The core principle is as follows: a closed loop is formed by two different conductors (or semiconductors), A and B. When the two junctions (the hot and cold ends) are at different temperatures, a thermoelectric potential (millivolt-level voltage) is generated

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Correct Application of Small Signal Cut-off in Flow Meters: Primary vs. Secondary Tables

Introduction: A common issue in flow measurement systems is the occurrence of small readings even when no flow is present. This phenomenon, caused by zero drift in the meter, can lead to inaccurate data, false alarms, and interference with control systems. The small signal cut-off feature is designed to address this issue by eliminating these

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Radar Level Transmitters: “How Much Temperature and Pressure Can They Withstand?”

In industries like chemical storage tanks, LNG storage and transportation, and heating systems, level measurement is crucial for ensuring both production safety and process stability. However, complex operating conditions, such as high temperatures, pressures, and strong corrosion, often cause traditional level transmitters, like float and differential pressure devices, to fail. Radar level transmitters, with their

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